Fermi Gamma-Ray Sky

Fermi LAT weekly report N.189

2012-01-31T04:39:00.000-08:00

Covered period: 2012.Jan.16 - 2012.Jan.22

LAT Mission week: 189.57 - 190.57

On Jan. 22 a new gamma ray source was detected with a daily flux about 0.5 X 10-6 near the FSRQ PKS 0646-306 . (ATel #3878). A Swift TOO confirmed an increase of the X-ray flux with respect to historical observation, confirming the identification with the blazar. (ATel #3894)

PKS 1510-08 was detected most of the week with daily flux in the range 1.0-2.1 X 10-6.

B2 1520+31 was detected most of the week with daily flux in the range 0.6-0.9 X 10-6.

4C +28.07 was detected early in the week with daily flux in the range 0.6-0.7 X 10-6.

Sporadic activity (fluxes below 1.0 X 10-6) observed from B2 2155+31, Mrk 421, PKS 1424-41,PKS 0402-362,3C 279,PKS 0537-441, 4C +38.41, PMN J2250-2806, S4 1749+70, Mrk 501, S5 0716+714, PKS 0521–36, Mrk 421, 1ES 2344+514 .

Fluxes are in the unit of photons/cm²/s above 100 MeV. All errors are statistical only.

Note. All the fluxes reported above are from the ASP analysis and should be considered preliminary and should not be used for publication, however they are indicative of the flux range and the current status of a source. Source association is done on the basis of source location, considering spatial coincidence only, and it is not indicative of an identification.
- Please acknowledge the LAT team if you use information from this report.

For questions and comments please contact:

- D. Gasparrini (gasparrini[at]asdc.asi.it) for generic information related to this week

- Contact persons on this page for individual sources cited above.

Fermi LAT weekly report N.188

2012-01-23T08:16:00.000-08:00

Covered period: 2012.Jan.09 - 2012.Jan.15

LAT Mission week: 188.57 - 189.57

After being observed last week, TXS 0059+58 was detected for a couple of days in the middle of this week, reaching 1.0 X 10-6 on Jan. 11 (ATel #3864 and GCN Event #1326489854).

4C +28.07 and PKS 0402-362 were detected through the week with daily flux in the range 0.5-0.8 X 10-6 and 0.5-0.6 X 10-6, respectively.

S5 0716+71 was detected in the half of the week with flux decreasing from 0.9 to 0.2 X 10-6.

PKS 1424-41 was detected with flux increasing from 0.4 X 10-6 early in the week and in the range 0.7-0.9 X 10-6 in the last days

PKS 1510-08 was detected all week with daily flux in the range 0.6-1.7 X 10-6.

PMN J2345-1555 was detected through the week with daily flux decreasing from 0.9 to 0.4 X 10-6.

Sporadic activity (fluxes below 1.0 X 10-6) observed from 3C 380 (0.1 on Jan. 10), PKS 0700-465 (0.3 on Jan. 12), PKS 0521-36 (0.5 on Jan. 14), B2 1520+31 (0.7 on Jan. 15), and 3C 279 (0.3 on Jan. 15).

Fluxes are in the unit of photons/cm²/s above 100 MeV. All errors are statistical only.

Note. All the fluxes reported above are from the ASP analysis and should be considered preliminary and should not be used for publication, however they are indicative of the flux range and the current status of a source. Source association is done on the basis of source location, considering spatial coincidence only, and it is not indicative of an identification.
- Please acknowledge the LAT team if you use information from this report.

For questions and comments please contact:

- D. Donato (donato[at]milkyway.gsfc.nasa.gov) for generic information related to this week

- Contact persons on this page for individual sources cited above.

Fermi LAT weekly report N. 187

2012-01-12T08:46:00.000-08:00

Covered period: 2011.Jan.02 - 2011.Jan.08

LAT Mission week: 187.57 - 188.57

PKS 1424-41 detected all week with daily fluxes below 1 X 10^-6.

B2 1520+31 continues to be detected with daily fluxes below 1 X 10^-6.

PMN J2345-1555 detected most of the week reaching a daily fluxes above 1 X 10^-6 on 8th of January.

ASP J174500-291500 (Galactic Center source) active all the week reaching a flux of 2.8 X 10^-6 on 5th of January.

4C +28.07, PKS 0402-362, Mrk 421, S5 0716+71, PKS 2326-502, Mrk 501 and 3C 279 detected in some days of the week (flux below 1 X 10^-6 ).

Fluxes are in the unit of photons/cm²/s above 100 MeV. All errors are statistical only.

Note. All the fluxes reported above are from the ASP analysis and should be considered preliminary and should not be used for publication, however they are indicative of the flux range and the current status of a source. Source association is done on the basis of source location, considering spatial coincidence only, and it is not indicative of an identification.
- Please acknowledge the LAT team if you use information from this report.

For questions and comments please contact:

- S. Cutini (sara.cutini[at]asdc.asi.it) for generic information related to this week

- Contact persons on this page for individual sources cited above.

Fermi LAT weekly report N. 186

2012-01-10T11:39:00.000-08:00

Covered period: 2011 Dec 26 - 2012 Jan 1

LAT Mission week: 186.57 - 187.57

Blazar 4C +71.07 (z=2.172) was the only extragalactic source above 1 X 10^-6 this week see See ATel#3831.

Blazar PKS 1424-41 bright on December 28 and January 1 with flux approaching 1 X 10^-6).

PMN J2345-1555, S5 1803+78, 4C +21.35 , S5 0716+71, 3C 66A, PKS 2326-502, BL Lac, B3 1343+451, 4C +28.07, PKS 0402-362 detected in one or two days of the week (flux below 1 X 10^-6 ).

Fluxes are in the unit of photons/cm²/s above 100 MeV. All errors are statistical only.

Note. All the fluxes reported above are from the ASP analysis and should be considered preliminary and should not be used for publication, however they are indicative of the flux range and the current status of a source. Source association is done on the basis of source location, considering spatial coincidence only, and it is not indicative of an identification.
- Please acknowledge the LAT team if you use information from this report.

For questions and comments please contact:

- M. Dutka (ditko86[at]gmail.com) for generic information related to this week

- Contact persons on this page for individual sources cited above.

Fermi LAT weekly report N. 185

2011-12-29T07:24:00.001-08:00

Fermi LAT weekly report N. 185

Covered period: 2011 December 19-25
LAT Mission week: 185.57 - 186.57

Renewed flaring activity from blazar 4C +71.07 (S5 0836+71). This MeV-peaked FSRQs reached a flux level of about 1.7E-6 (3E-6 in a 6h time bin) on December 25 with soft photon index (see ATel#3831). This source has been active in gamma-rays for several weeks.

BL Lac showed a flare on December 22 (flux about 1.6E-6, soft photon index).

Other bright blazars reaching the flux level of 1E-6 in some days of the week are: 4C +28.07, PKS 0454-234, PKS 1424-41, PKS 1510-08.

Other blazars detected most days of the week (below 1E-6) are: PKS 2345-16, PKS 2326-502, B2 1520+31, Mkn 421, Mkn 501.

Other blazars sporadically detected during the week (below 1E-6) are: NGC 1275, B3 1343+451, PKS 0402-362, PKS 0537-441, PKS 0524-485, 4C +55.17, PMN J0533-4632, S5 0716+714, PKS 2155-304, 3C 66A, 3C 279

Fluxes are in the unit of photons/cm^2/s above 100 MeV.

Note. All the flux reported above are by the ASP analysis and should be considered preliminary and should not be used for publication, however they are indicative of the flux range and the current status of a source. Source association is done on the basis of source location, considering spatial coincidence only, and it is not indicative of an identification. - Please acknowledge the LAT team if you use information from this report.

For questions and comments please contact:
- S. Ciprini (stefano.ciprini[at]asdc.asi.it) for generic information related to this week
- Contact persons on this page for individual sources cited above.

Fermi LAT weekly report N. 184

2011-12-22T03:05:00.000-08:00

Covered period: 2011.Dec.12 - 2011.Dec.18

LAT Mission week: 184.57 - 185.57

PKS 2123-463 detected in flaring activity on December 14, with a daily flux of (1.1+/-0.2)e-6 (Atel #3808). Swift follow-up observations of PKS 2123-463 confirmed the increase of activity also in UV and X-ray bands (Atel #3815).

PKS 0454-234 detected all week, with a daily flux between (0.5+/-0.1)e-6 and (1.1+/-0.2)e-6.

PKS 1510-08 detected in high state on December 18 with a daily flux of (1.9+/-0.5)e-6.

PKS 1343+451 detected all week, except December 13, with a daily flux between (0.4+/-0.2)e-6 and (0.8+/-0.2)e-6.

4C +28.07 detected on December 14, 16 and 17, with a daily flux between (0.6+/-0.2)e-6 and (0.9+/-0.3)e-6.

B2 1520+31 detected on December 12, 15, and 18, with a daily flux between (0.4+/-0.2)e-6 and (0.5+/-0.2)e-6.

Sporadic daily detections of blazars: S5 0716+714 (Dec 12 and 18), PKS 2326-502 (Dec 12 and 14), PKS 1424-41 (Dec 13 and 14), PMN J2250-2806 (Dec 14), TXS 0059+581 (Dec 16), PMN J2345-1555 (Dec 17), PKS 2345-16 (Dec 18).

Fluxes are in the unit of photons/cm²/s above 100 MeV. All errors are statistical only.

Note. All the fluxes reported above are from the ASP analysis and should be considered preliminary and should not be used for publication, however they are indicative of the flux range and the current status of a source. Source association is done on the basis of source location, considering spatial coincidence only, and it is not indicative of an identification.
- Please acknowledge the LAT team if you use information from this report.

For questions and comments please contact:

- M. Orienti (orienti[at]ira.inaf.it) for generic information related to this week

- Contact persons on this page for individual sources cited above.

2011-12-16T05:20:00.000-08:00

Covered period: 2011.Dec.5 - 2011.Dec.11

LAT Mission week: 183.57 - 184.57

PKS 0454-234 detected in a flaring activity with a high significance detection every day, with daily flux between (0.6+/-0.1)x10^-6 and (1.1+/-0.2)x10^-6.

B3 1343+451 detected every day in a high state, with daily flux between (0.6+/-0.2)x10^-6 and (1.0+/-0.2)x10^-6.

BL Lac detected every day except on Dec. 8 with a particularly
high flux of (1.3+/-0.2)x10^-6 on Dec. 11.

PKS 2326-502 detected on Dec. 5, 8 and 11 with daily flux
between (0.4+/-0.1)x10^-6 and (0.7+/-0.2)x10^-6.

4C +28.07 detected on Dec. 5, 6, 8 and 9 with daily flux
between (0.6+/-0.2)x10^-6 and (0.9+/-0.3)x10^-6.

PKS 1424-41 detected in a high state on Dec. 11 with daily
flux of (0.9+/-0.2)x10^-6.

PMN J2345-1555, almost detected on Dec. 5 with TS=24.4,
appeared as a significant detection on Dec. 7 and 9 with flux
below 0.5x10^-6.

4C +71.07 popped up at the very beginning of the week on Dec.
5 with a daily flux of (0.9+/-0.2)10^-6.

TXS 0059+581 detected on Dec. 6 with a daily flux of (0.7+/-0.2)x10^-6.

B2 1520+31 and PKS 0716+714 detected twice this week,
respectively on Dec. 8 and 11 (with daily flux of (0.8+/-0.2)x10^-6 and (0.5+/-0.2)x10^-6) and on Dec. 10 and 11 (with daily flux of (0.3+/-0.1)x10^-6 and (0.6+/-0.2)x10^-6).

Markarian 501 almost detected on Dec. 10 with TS=24.7 and a
daily flux of (0.4+/-0.2)x10^-6.

Sporadic detections of blazars : ASP J134421+451449 on Dec. 8
with daily flux of (0.6+/-0.2)x10^-6, ASP J133838+450232 on
Dec. 11 with daily flux of (0.8+/-0.2)x10^-6, S5 0836+71 on Dec. 5 with daily flux of (0.9+/-0.2)x10^-6.

Fluxes are in the unit of photons/cm²/s above 100 MeV. All errors are statistical only.

Note. All the fluxes reported above are from the ASP analysis and should be considered preliminary and should not be used for publication, however they are indicative of the flux range and the current status of a source. Source association is done on the basis of source location, considering spatial coincidence only, and it is not indicative of an identification.
- Please acknowledge the LAT team if you use information from this report.

For questions and comments please contact:

- L. Escande (escande[at]cenbg.in2p3.fr) for generic information related to this week

- Contact persons on this page for individual sources cited above.

Fermi LAT weekly report N.182

2011-12-14T09:56:00.000-08:00

Covered period: 2011.Nov.28 - 2011.Dec.04

LAT Mission week: 182.57 - 183.57

B3 1343+451 was detected every day. It flared up to a daily flux of (1.2 ± 0.2) x 10^-6 (on Nov 29th) before declining to (0.4 ± 0.2) x 10^-6. This was the highest gamma-ray flux level detected from this very high redshift (z=2.534) FSRQ and was reported in ATel #3793. This source has been intermittently detected since early October and had a steadily rising daily-averaged flux from the preceding week.

PKS0454-234 was detected every day except Nov 29th with daily-averaged fluxes between (0.4 ± 0.2) x 10^-6 and (1.7 ± 0.2) x 10^-6.

B2 1520+31 detected on Nov 28th, Nov 30th, Dec 1st through 3rd with daily flux declining from (1.2 ± 0.2) x 10^-6 to (0.4 ± 0.2) x 10^-6.

4C +28.07 was detected every day starting from Nov 28th reaching a peak daily-averaged flux of (1.0 ± 0.2) x 10^-6 on Dec 3rd.

PKS1244-255, PKS 0537-441, 4C71.07, Mrk 421, J2345-1555, BL Lac, PKS1424-41, PKS2320-005, TXS0059+581, NGC 1275 (3C84), OJ287 detected in one or two days of the week (flux below 1 x 10^-6 ).

Fluxes are in the unit of photons/cm²/s above 100 MeV. All errors are statistical only.

Note. All the fluxes reported above are from the ASP analysis and should be considered preliminary and should not be used for publication, however they are indicative of the flux range and the current status of a source. Source association is done on the basis of source location, considering spatial coincidence only, and it is not indicative of an identification.
- Please acknowledge the LAT team if you use information from this report.

For questions and comments please contact:

- R. Ojha (roopesh.ojha[at]gmail.com) for generic information related to this week

- Contact persons on this page for individual sources cited above.

Fermi LAT weekly report N. 181

2011-11-30T07:13:00.000-08:00

Covered period: 2011.Nov.21 - 2011.Nov.27

LAT Mission week: 181.57 - 182.57

ASPJ134924-113145 (FERMI J1350-1140) detected on November 25 with a daily flux (1.2+/-0.2)e-6. See also ATel #3788. The preliminary best-fit location of the gamma-ray source (R.A.= 207.51 deg, Dec.= -11.68 deg, J2000) has a 95% containment radius of 0.15 deg (statistical errors only) for observations from 20 to 26 November 2011. The source is not present in any Fermi LAT catalog released up to now and there is no previously reported EGRET gamma-ray detection at this location. The nearest flat spectrum radio source is PKS 1346-112.

4C +28.07 bright all week, with a daily flux between (0.9+/-0.2)e-6 and (1.5+/-0.3)e-6.

PKS 1424-41 detected on November 21-24 and 27 with a daily flux between (0.6+/-0.2)e-6 and (0.9+/-0.2)e-6.

PKS 1510-08 detected on November 21 and 22 with a daily flux of (2.0+/-0.3)e-6 and (1.5+/-0.3)e-6, respectively.

PKS 0454-234 detected on November 23-25 with a daily flux between (1.0+/-0.3)e-6 and (1.1+/-0.4)e-6.

B3 1343+451 regularly detected starting from November 23 with a daily flux between (0.6+/-0.2)e-6 and (0.9+/-0.2)e-6.

Sporadic daily detection of blazars: BL Lacertae (Nov 21), PKS 0537-441 (Nov 23 and 25), 4C +71.07 (Nov 23 and 24), B2 1846+32A (Nov 23 and 24), PKS 1244-255 (Nov 25), B2 1520+31 (Nov 25 and 26), S5 0716+714 (Nov 26), 3C 279 (Nov 27), PKS 1145-071 (Nov 27).

Fluxes are in the unit of photons/cm²/s above 100 MeV. All errors are statistical only.

Note. All the fluxes reported above are from the ASP analysis and should be considered preliminary and should not be used for publication, however they are indicative of the flux range and the current status of a source. Source association is done on the basis of source location, considering spatial coincidence only, and it is not indicative of an identification.
- Please acknowledge the LAT team if you use information from this report.

For questions and comments please contact:

- E. Torresi (torresi[at]iasfbo.inaf.it) for generic information related to this week

- Contact persons on this page for individual sources cited above.

Fermi LAT weekly report N. 180

2011-11-24T07:31:00.000-08:00

Covered period: 2011.Nov.14 - 2011.Nov.20

LAT Mission week: 180.57 - 181.57

PKS 1510-089 in high state starting from November 15, with a daily flux between (1.3+/-0.2)e-6 and (3.8+/-0.4)e-6.

4C +28.07 bright all the week, with a daily flux between (1.4+/-0.2)e-6 and (1.7+/-0.3)e-6.

S5 0836+71 (4C +71.07) detected on November 15, 19, and 20, with a daily flux between (0.8+/-0.2)e-6 and (1.5+/-0.2)e-6.

B3 1343+451 detected on November 16, 17, and 18, with a daily flux of (0.4+/-0.2)e-6, (0.9+/-0.3)e-6, and (0.3+/-0.1)e-6, respectively.

Sporadic daily detections of blazars: Mkn 421 (Nov 14 and 16), PKS 1124-186 (Nov 14 and 16), PKS 1424-41 (Nov 14), TXS 0059+581 (Nov 15), PKS 2326-502 (Nov 16 and 20), Mkn 501 (Nov 19), PKS 1244-255 (Nov 19).

Fluxes are in the unit of photons/cm²/s above 100 MeV. All errors are statistical only.

Note. All the fluxes reported above are from the ASP analysis and should be considered preliminary and should not be used for publication, however they are indicative of the flux range and the current status of a source. Source association is done on the basis of source location, considering spatial coincidence only, and it is not indicative of an identification.
- Please acknowledge the LAT team if you use information from this report.

For questions and comments please contact:

- F. D'Ammando (dammando[at]ira.inaf.it) for generic information related to this week

- Contact persons on this page for individual sources cited above.

Fermi LAT weekly report N. 179

2011-11-16T07:25:00.000-08:00

Covered period: 2011 November 7-13

LAT Mission week: 179.57 - 180.57

Gamma-ray flare of blazar OG 050 (TXS 0529+075, z=1.254) on Nov.7 (see ATel#3750). This FSRQ kept bright all the week (peak daily flux of 1.6E-6 on Nov.9).

PKS 1510-08 was in very high state (daily flux 8.2E-6 on Nov.7) fading slowly during the week.

S5 0836+71 (4C +71.07) still bright in the first part of the week (above 2E-6).

PKS 0454-234, BL Lac, and 4C +28.07 (B2 0234+28) are the blazars detected above 1E-6 in some days of the week.

The sun is detected on Nov. 7 and the Galactic center source is clearly detected above 2E-6 on Nov.9 and Nov.11.

HMXRB/MQ LS 5039 and LS I+61 303, SNR IC 443 and W44 detected in some days of the week.

Other blazars detected on daily time bins, below 1E-6 are: PKS 1124-186, PMN J2345-1555, PKS 2326-502, Mkn 501, Mkn 421, S5 0716+71, B2 0716+33, 3C 279, B2 1520+31, B3 1343+451, PKS 2320-035, Ton 599 (4C +29.45), TXS 0059+581, PKS 2155-304, OJ 287, PKS 1424-41.

Fluxes are in the unit of photons/cm^2/s above 100 MeV.

Note. All the flux reported above are by the ASP analysis and should be considered preliminary and should not be used for publication, however they are indicative of the flux range and the current status of a source. Source association is done on the basis of source location, considering spatial coincidence only, and it is not indicative of an identification. - Please acknowledge the LAT team if you use information from this report.

For questions and comments please contact:

- S. Ciprini (stefano.ciprini[at]asdc.asi.it) for generic information related to this week

- Contact persons on this page for individual sources cited above.

Fermi LAT weekly report N.178

2011-11-08T11:51:00.000-08:00

Covered period: 2011.Oct.31 - 2011.Nov.06

LAT Mission week: 178.57 - 179.57

4C +28.07 was very bright all week with daily flux above 0.9 X 10^-6 and reaching the highest value on Nov. 2 (1.5 X 10^-6).

PKS 0454-234 showed an increase of luminosity, with daily flux starting at 0.5 X 10^-6 and culminating on Nov. 4 at 1.3 X 10^-6.

B2 0716+33 was detected after Nov. 3 with flux decreasing from 0.8 to 0.3 X 10^-6.

4C +71.07 showed a flaring activity on Nov. 1 (daily flux 3.6 X 10^-6) and remained active for the rest of the week (flux in the range 1.1-1.5 X 10^-6).

OJ 287 was detected all week with daily flux in the range 0.8-1.6 X 10^-6.

Mkn 421 was detected on Nov. 1, 4, and 5 with daily flux of 0.2 X 10^-6.

B3 1343+451 was detected all week with daily flux in the range 0.4-0.9 X 10^-6.

PKS 1510-08 was extremely bright all week long, with daily flux above 2.6 X 10^-6 and reaching the maximum intensity on Nov. 2 and 3, with flux above 1.0 X 10^-5.

BL Lac was detected on Oct. 31, and Nov. 1 and 6 with daily flux in the range 1.2-1.9 X 10^-6.

PKS 2326-502 was detected all week with daily flux in the range 0.4-0.6 X 10^-6.

PMN J2345-1555 showed a rising daily flux from 0.4 on Oct. 31 to 1.5 X 10^-6 on Nov. 4. It faded afterwards reaching 0.6 X 10^-6 by the end of the week.

Sporadic activity (fluxes below 1.0 X 10^-6) observed from PKS 1124-186 (0.6 on Nov. 3 and 0.7 on Nov. 5), B2 1520+31 (0.5 on Nov. 4 and 0.2 on Nov. 5), PKS 0301-243 (0.2 on Nov. 2), PKS 0524-485 (0.4 on Oct. 31), OG 050 (0.6 on Nov. 5), AP Lib (0.8 on Nov. 4), and Mkn 501 (0.4 on Nov. 3)

Fluxes are in the units of photons/cm²/s above 100 MeV. All errors are statistical only.

Note. All the fluxes reported above are from the ASP analysis and should be considered preliminary and should not be used for publication, however they are indicative of the flux range and the current status of a source. Source association is done on the basis of source location, considering spatial coincidence only, and it is not indicative of an identification.
- Please acknowledge the LAT team if you use information from this report.

For questions and comments please contact:

- D. Donato (donato[at]milkyway.gsfc.nasa.gov) for generic information related to this week

- Contact persons on this page for individual sources cited above.

Fermi LAT weekly report N.177

2011-11-08T02:57:00.000-08:00

Covered period: 2011.Oct.23 - 2011.Oct.30

LAT Mission week: 177.57 - 178.57

PKS 1510-089 continues to be detected all week with daily fluxes around or above 1.5 X 10^-6.

Mkn 421 quite active during the week reaching a flux of 0.4 X 10^-6 on 24th and 28th October

4C +28.07 bright all the week (flux approaching around 1 X 10^-6).

PKS 0454-234 and S5 0716+714 continue to be detected all week with daily fluxes below 1 X 10^-6.

OJ 287, PKS 1424+240, B2 1520+31, PKS 1124-186, PKS 2345-16 detected in one or two days of the week (flux below 1 X 10^-6 ).

Fluxes are in the unit of photons/cm²/s above 100 MeV. All errors are statistical only.

Note. All the fluxes reported above are from the ASP analysis and should be considered preliminary and should not be used for publication, however they are indicative of the flux range and the current status of a source. Source association is done on the basis of source location, considering spatial coincidence only, and it is not indicative of an identification.
- Please acknowledge the LAT team if you use information from this report.

For questions and comments please contact:

- S. Cutini (sara.cutini[at]asdc.asi.it) for generic information related to this week

- Contact persons on this page for individual sources cited above.

Fermi LAT weekly report N.176

2011-10-28T03:02:00.000-07:00

Covered period: 2011.Oct.17 - 2011.Oct.23

LAT Mission week: 176.57 - 177.57

PKS 1510-08 was in a state of high activity all week, reaching a daily peak flux of (15.9±1.0) x 10^-6 on October 19 2011, ATel#3694.

PKS 0454-234 detected every day except on October 17 with daily flux reaching a peak of (1.7±0.2) x 10^-6 on October 22 2011, ATel#3703.

PKS 1124-186 detected on October 10, 11, 12 and 14 with daily flux between (0.3±-0.1) x 10^-6 and (0.6±0.1) x 10^-6.

4C +28.07 detected every day with daily flux between (0.6±0.3) x 10^-6 and (1.2±0.3) x 10^-6.

PKS 2345-1555 detected on Oct. 17, 18 and 23 with daily flux of (0.4±0.2) x 10^-6 and (0.7±0.3) x 10^-6.

PKS 2326-502 detected on Oct. 17 and 22 with daily flux of (0.7±0.2) x 10^-6 and (0.5±0.2) x 10^-6.

S5 0716+714 (also known as CGRaBS J0721+7120) detected every day reaching a peak flux of (1.5±0.2) x 10^-6 and an ATel was issued by Blinov et al, ATel#3700.

PKS 0537-441, PKS 1055+01, 1633+382, TXS 1530-131, B2 1510+31, CRATES, J1016+0513, 3C 371 and 2155-304 were detected this week.

There was no report for October 21 because the data were unavailable.

Fluxes are in the unit of photons/cm²/s above 100 MeV. All errors are statistical only.

Note. All the fluxes reported above are from the ASP analysis and should be considered preliminary and should not be used for publication, however they are indicative of the flux range and the current status of a source. Source association is done on the basis of source location, considering spatial coincidence only, and it is not indicative of an identification.
- Please acknowledge the LAT team if you use information from this report.

For questions and comments please contact:

- F. Hungwe (faith.hungwe[at]gmail.com) for generic information related
to this week

- Contact persons on this page for individual sources cited above.

Fermi LAT weekly report N. 175

2011-10-19T07:05:00.000-07:00

Covered period: 2011.October.10 - 2011.October.16

LAT Mission week: 175.57 - 176.57

PKS 1510-08 detected in flaring activity with a high significance
detection almost every day, with daily flux between
(1.8+/-0.4)x10^-6 and (3.9+/-0.6)x10^-6.

OJ 287 detected three times this week in a high state, with a peak daily
flux of (1.0+/-0.2)x10^-6 on October 10 (ATel#3680).

PKS 0454-234 detected every day with daily flux between (0.4+/-0.1)x10^-6 and (1.1+/-0.2)x10^-6.

PKS 1124-186 detected on October 10, 11, 12 and 14 with daily flux between (0.3+/-0.1)x10^-6 and (0.6+/-0.1)x10^-6.

4C +28.07 detected on October 11, 13, 14, 15 and 16 with daily flux between (0.9+/-0.2)x10^-6 and (1.4+/-0.3)x10^-6.

PKS 2345-16 detected on Oct. 10 and 12 with daily flux of (0.6+/-0.2)x10^-6 and (0.8+/-0.3)x10^-6.

S5 0716+71 detected on Oct. 11 and 12 with daily flux of (0.5+/-0.1)x10^-6.

CGRaBS J0948+0022 detected on Oct. 12 and 13 with daily flux of
(0.5+/-0.2)x10^-6 and (0.6+/-0.2)x10^-6.

BL Lac, 4C +29.45, PKS 0426-380 and PKS 0528+134 detected only once this week with daily flux of (1.2+/-0.2)x10^-6, (0.7+/-0.2)x10^-6, (0.8+/-0.2)x10^-6 and (0.6+/-0.2)x10^-6 respectively.

Sporadic daily detections of blazars with daily fluxes below 0.5e-6 :
PKS 1004-217, B3 1343+451, B2 1520+31, PKS 0627-199.

Fluxes are in the unit of photons/cm²/s above 100 MeV. All errors are statistical only.

Note. All the fluxes reported above are from the ASP analysis and should be considered preliminary and should not be used for publication, however they are indicative of the flux range and the current status of a source. Source association is done on the basis of source location, considering spatial coincidence only, and it is not indicative of an identification.
- Please acknowledge the LAT team if you use information from this report.

For questions and comments please contact:

- L. Escande (escande@cenbg.in2p3.fr) for generic information related to this week

- Contact persons on this page for individual sources cited above.

Fermi LAT weekly report N. 174

2011-10-18T03:44:00.000-07:00

Covered period: 2011 October 03 - 09

LAT Mission week: 174.57 - 175.57

4C +28.07 detected in a flaring state, reaching a daily peak flux of
(2.3 ± 0.3) x 10^-6 on Oct. 4 (Atel #3670, #3676).

OJ 287 was detected throughout the week with increasing flux,
reaching a daily value of (0.8 ± 0.2) x 10^-6 on Oct 7 (ATel #3680).

3C 446 showed a fast flare on Oct. 8, with a daily average value of
(1.5 ± 0.4) x 10^-6 (ATel #3675).

PKS 0454-234 was detected multiple times during the week, with daily
flux levels around 1 x10^-6.

TeV source PKS 1510-089 started to brighten on Oct. 7, reaching a
daily flux value of (3.3 ± 0.5) x 10^-6 by the end of the week.

TeV source NGC 1275 showed a fast outburst on Oct. 6, with a daily
flux of (0.6 ± 0.2) x ^-6.

Other active extragalactic sources were: S5 0716+71, PKS
0627-199, 4C +38.41.

The last six hours on Oct. 5 were impacted by pointed observations
toward the Earth (nadir).

Fluxes are in the unit of photons/cm²/s above 100 MeV. All errors are statistical only.

Note. All the fluxes reported above are from the ASP analysis and should be considered preliminary and should not be used for publication, however they are indicative of the flux range and the current status of a source. Source association is done on the basis of source location, considering spatial coincidence only, and it is not indicative of an identification.
- Please acknowledge the LAT team if you use information from this report.

For questions and comments please contact:

- F. Schinzel (schinzel[at]mpifr.de) for generic information related to this week

- Contact persons on this page for individual sources cited above.

Fermi LAT weekly report N. 173

2011-10-11T02:08:00.000-07:00

Covered period: 2011 September 12-18

LAT Mission week: 173.57 - 174.57

PKS 0402-362 was very bright on Sept. 26 (daily flux about 2.2E-6) and decreasing during the rest of the week.

4C +28.07 showed a flare on Sept. 30 when the daily averaged flux observed was about 1E-6.

The Sun was detected on daily interval (flux about 0.6E-6) on Sept. 29.

The other blazars detected at least in a day of the week (all below 1E-6 in flux) were:
NGC 1275, Mkn 421, BL Lac, OJ 287, PKS 1830-211, PKS 0537-441, S5 0716+71, PKS 1510-08, PKS 1124-186, Ton 599, TXS 1530-131, 4C +55.17, B2 0716+33, PKS 1424+240, S4 1030+61, PKS 0301-243, PKS 2227-08, B3 1343+451.

Fluxes are in the unit of photons/cm^2/s above 100 MeV.

Note. All the flux reported above are by the ASP analysis and should be considered preliminary and should not be used for publication, however they are indicative of the flux range and the current status of a source. Source association is done on the basis of source location, considering spatial coincidence only, and it is not indicative of an identification. - Please acknowledge the LAT team if you use information from this report.

For questions and comments please contact:

- S. Ciprini (stefano.ciprini[at]asdc.asi.it) for generic information related to this week

- Contact persons on this page for individual sources cited above.

Fermi LAT weekly report N. 172

2011-09-29T07:20:00.000-07:00

Covered period: 2011.September.19 - 2011.September.25

LAT Mission week: 172.57 - 173.57

PKS 0402-362 detected in flaring activity starting from September 20, with a daily flux between (0.9+/-0.3)e-6 and (6.6+/-0.7)e-6 (ATel #3655).

SBS 1150+497 detected on September 19, 20, and 24, with a daily flux between (0.4+/-0.1)e-6 and (0.8+/-0.2)e-6.

S5 0716+714 detected on Sept 21 and 22, with a daily flux of (0.4+/-0.1)e-6 and (0.6+/0.1)e-6, respectively.

PKS 1510-089 detected on Sept 21 and 22, with a daily flux of (0.9+/-0.2)e-6 and (0.5+/0.2)e-6, respectively.

NGC 1275 detected on Sept 23 and 24, with a daily flux of (0.6+/-0.2)e-6 and (0.7+/-0.2)e-6, respectively.

Sporadic daily detections of blazars: CRATES J1303+2433 (Sept 19), PKS 2326-502 (Sept 20), PMN J2345-1555 (Sept 20), PKS 0537-441 (Sept 21), Mrk 421 (Sept 23), 3C 279 (Sept 23), PKS 2207-08 (Sept 23), 4C +38.41 (Sept 24).

Fluxes are in the unit of photons/cm²/s above 100 MeV. All errors are statistical only.

Note. All the fluxes reported above are from the ASP analysis and should be considered preliminary and should not be used for publication, however they are indicative of the flux range and the current status of a source. Source association is done on the basis of source location, considering spatial coincidence only, and it is not indicative of an identification.
- Please acknowledge the LAT team if you use information from this report.

For questions and comments please contact:

- F. D'Ammando (filippo.dammando[at]ifc.inaf.it) for generic information related to this week

- Contact persons on this page for individual sources cited above.

Fermi LAT weekly report N. 171

2011-09-26T23:47:00.000-07:00

Fermi LAT weekly report N. 171

Covered period: 2011 September 12-18

LAT Mission week: 171.57 - 172.57

S5 0716+71 and 4C +01.28 (also known as OL 93, PKS 1055+01) were bright, with a daily flux level around 1E-6 on Sept.12. In particular S5 0716+714 was detected all week.

MG1 J050533+0415 (also known as RX J0505.5+0416) showed a flare with daily flux around 1E-6 on Sept.17 (ATel#3573 was issued recently, last August).

TXS 0506+056 (also known as ZS 0506+056) detected above 2E-6 in a 6h interval of Sept.12.

The other blazars detected at least in a day of the week, with daily flux
below 1E-6, were:
Mkn 421, Mkn 501, 3C 279, OJ 287, PKS 2155-304, PKS 1510-09, 4C +38.41, NGC 1275, PKS 1830-211, PMN J2250-2806, PKS 2326-502, PKS 0208-512, B3 1343+451, MG1 J024614+1823 (also known as GB6 J0246+1823), PKS 2345-16, B2 1520+31, and PKS 0402-362.

PKS 1510-08, PKS 1830-211, PKS 2326-502 were the brightest blazars based on the weekly-integrated timescale.

Fluxes are in the unit of photons/cm^2/s above 100 MeV.

Note. All the flux reported above are by the ASP analysis and should be considered preliminary and should not be used for publication, however they are indicative of the flux range and the current status of a source. Source association is done on the basis of source location, considering spatial coincidence only, and it is not indicative of an identification.
- Please acknowledge the LAT team if you use information from this report.

For questions and comments please contact:
- S. Ciprini (stefano.ciprini[at]asdc.asi.it) for generic information related to this week
- Contact persons on this page for individual sources cited above.

Fermi LAT weekly report N. 170

2011-09-19T09:17:00.000-07:00

Covered period: 2011.Sept.5 - 2011.Sept.11

LAT Mission week: 170.57 - 171.57

Between Sept. 7 at 23:30 UT and Sept. 10 at 23:30 UT, a pointing mode observation of the Sun (RA, Dec: 167.78, +15.24) was performed by the Fermi-LAT after a detection of a bright flare on Sept. 6.

Mkn 421 was detected at high significance throughout the week at low flux (~0.2 X 10^-6) and showing a flat spectrum (index<~1.7).

BMG1 J050533+0415 continued to be detected during the week with flux in the range 0.8-2.0 X 10^-6.

PKS 2326-502, 4C +38.41, 4C +28.07 were detected in the first few days of the week. The flux of PKS 2326-502 varied in the range 0.5-0.8 X 10^-6, while it was stable for 4C +38.41 and 4C +28.07 at the value of 0.9 and 0.6 X 10^-6, respectively.

Sporadic activity (fluxes below 1.0 X 10^-6) observed from PKS 0208-512 (0.6 on Sept. 5), PKS 2155-304 (0.6 on Sept. 6 and 0.2 on Sept. 11), PKS 1424+240 (0.4 on Sept. 6), TXS 1530-131 (0.9 on Sept. 6 and 0.5 on Sept. 7), CRATES J1239+0443 (0.4 on Sept. 8), CGRaBS J0721+7120 (0.3 on Sept. 8 and 0.7 on Sept. 9), B3 1343+451 (0.2 on Sept. 9), PKS 1055+01 (0.4 on Sept. 10), 4C +71.07 (0.9 on Sept. 10 and 0.8 on Sept. 11).

Fluxes are in the unit of photons/cm²/s above 100 MeV. All errors are statistical only.

Note. All the fluxes reported above are from the ASP analysis and should be considered preliminary and should not be used for publication, however they are indicative of the flux range and the current status of a source. Source association is done on the basis of source location, considering spatial coincidence only, and it is not indicative of an identification.
- Please acknowledge the LAT team if you use information from this report.

For questions and comments please contact:

- D. Donato (donato[at]milkyway.gsfc.nasa.gov) for generic information related to this week

- Contact persons on this page for individual sources cited above.

Fermi LAT weekly report N. 169

2011-09-14T09:43:00.000-07:00

Covered period: 2011.Aug.29 - 2011.Sep.04

LAT Mission week: 169.57 - 170.57

Between 31 August 12:00 UT and 2 September 12:00 UT a pointing mode observation of the Galactic center was performed by the Fermi-LAT.

BMG1 J050533+0415 detected in a very high state on August 29, September 2, and 4 with an increasing daily flux between (0.8+/-0.2)e-6 and (2.0+/-0.3)e-6.

TXS 1530-131 (also known as PMN J1532-1319) detected on August 30, August 31, September 1, 2, and 4 with a daily flux between (0.4+/-0.2)e-6 and (0.9+/-0.2)e-6.

A gamma-ray flare from CTA 102 was detected on August 29, with a daily flux of (1.1+/-0.4)e-6.

S5 0716+714 detected on August 30, September 1, 3, and 4, with a daily flux between (0.3+/-0.1)e-6 and (0.4+/-0.1)e-6.

Sporadic daily detections of blazars: CRATES J0809+5218 (Aug 29), B2 0218+35 (Aug 30), BL Lac (Aug 31), PKS 1510-089 (Sept 1), 4C +38.41 (Sept 3).

Fluxes are in the unit of photons/cm²/s above 100 MeV. All errors are statistical only.

Note. All the fluxes reported above are from the ASP analysis and should be considered preliminary and should not be used for publication, however they are indicative of the flux range and the current status of a source. Source association is done on the basis of source location, considering spatial coincidence only, and it is not indicative of an identification.
- Please acknowledge the LAT team if you use information from this report.

For questions and comments please contact:

- F. D'Ammando (dammando[at]ifc.inaf.it) for generic information related to this week

- Contact persons on this page for individual sources cited above.

Fermi LAT weekly report N. 167

2011-09-02T02:38:00.000-07:00

Covered period: 2011.Aug.15 - 2011.Aug.21

LAT Mission week: 167.57 - 168.57

New gamma ray detection in the vicinity of TXS 1530-131 (PMNJ1532-1319). The source brightened in gamma rays on August 22, 2011, with a daily flux of 1.2 +/- 0.4 X 10^-6. (ATel#3573).

Gamma ray Flare of MG1 J050533+0415 (CRATES J0505+0415) detected on Aug 19 with a daily flux of 1.2 +/- 0.2 X 10^-6. During the six-hour interval from 00:00:00 to 06:00:00 UTC on the same day, the source
reached a flux of 3.7 +/- 0.9 X 10^-6. (See ATel#3579).

PKS 1510-089 continues its high gamma ray activity started months ago, being detected for most of the week reaching the flux of 2.6 +/- 0.4 X 10^-6 on Aug 17.

PKS 1244–255detected between 16 and 21 Aug with a daily flux around 1 X 10^-6.

NGC1275 detected on Aug 21 with a daily flux of 0.3 +/- 0.1 X 10^-6.

Sporadic daily detections of blazars (daily flux under 1 X 10^-6): PKS 0537–441, B2 0218+35,PKS 1424–41,PKS 0454–234, B3 0650+453 , S4 0646+60 (OH 577.1), RX J0948.8+0022, B3 1343+451, CTA 102, BL LAC, CRATES J0719-3928, B2 1520+31, S5 0716+714,PKS 2142-75, PKS 2326-502, PMN J2345-1555, 3C 279, SDSS J123932.75+044305, 3C 66A.

Fluxes are in the unit of photons/cm²/s above 100 MeV. All errors are statistical only.

Note. All the fluxes reported above are from the ASP analysis and should be considered preliminary and should not be used for publication, however they are indicative of the flux range and the current status of a source. Source association is done on the basis of source location, considering spatial coincidence only, and it is not indicative of an identification.
- Please acknowledge the LAT team if you use information from this report.

For questions and comments please contact:

-D. Gasparrini(gasparrini@asdc.asi.it) for generic information related to this week.

- Contact persons on this page for individual sources cited above.

Fermi LAT weekly report N. 166

2011-09-02T02:23:00.000-07:00

Covered period: 2011.Aug.07-2011.Aug.14

LAT Mission week: 166.57 - 167.57

Extragalactic sky:

PKS 1510-08 was very active all week reaching a maximum on August 12th with a daily flux of 2.4 +/- 0.4 x 10^-6 .

PKS 1244-255 bright most of the week reaching the threshold of 1.0 +/- 0.2 x 10^-6 on August 14th .

PMN J2345-1555 detected most of the week with an average flux of about 0.5 x 10^-6 .

B2 1520+31, 4C +21.35, 3C 279, PKS 0537-441, were detected in one or two days of the week (flux below 1 x 10^-6 ).

Galactic sky:

Concerning to Atel #3345 we do not confirm the AGILE detection of a new unidentified source AGL 2103+5630

Fluxes are in the unit of photons/cm²/s above 100 MeV. All errors are statistical only.

Note. All the fluxes reported above are from the ASP analysis and should be considered preliminary and should not be used for publication, however they are indicative of the flux range and the current status of a source. Source association is done on the basis of source location, considering spatial coincidence only, and it is not indicative of an identification.
- Please acknowledge the LAT team if you use information from this report.

For questions and comments please contact:

- S. Cutini (sara.cutini[at]asdc.asi.it) for generic information related to this week

- Contact persons on this page for individual sources cited above.

Fermi LAT weekly report N. 165

2011-08-11T11:23:00.000-07:00

Covered period: 2011.Aug.01-2011.Aug.07

LAT Mission week: 165.57 - 166.57

The transition to Pass7 data happened on August 1st at 10am. As a consequence the daily run on this day was difficult to analyze. But from August 2nd on, the pipeline ran through normally.

Extragalactic sky:

B2 1144+40 reaching (0.4 ± 0.1) e-6 on Aug. 2 and 5, and also detected on Aug. 3.
4C +21.35 detected on the daily run on Aug. 4 but also on a 6 hours run on Aug. 6 reaching (1.1 ± 0.5) e-6.
PKS 1510–08 detected on Aug. 5 and 7 reaching a daily flux of (1.3 ± 0.3) e-6 peaking at (2.98e-6 ± 0.85) e-6 in a 6-hours run.
3C 279 detected on Aug. 4 and 7 reaching (0.7 ± 0.2) e-6 that day.
CRATES J1239+0443 detected on Aug. 5 and 7 reaching (0.7 ± 0.2) e-6 that day.
After a very active period in July, BL Lac was detected on August 2nd with a modest daily flux of (1.0 ± 0.3) e-6.
Sporadic detections on on day of the week: B2 1308+32 (Aug. 2), PKS 0537–441 (Aug. 2), B2 0716+33 (Aug. 3), Mkn 421 (Aug. 7).

Solar Activity:

The Sun was very active during this week, with several M-class Xray flares. This caused the response of the LAT to be compromised on small time intervals. [All the fluxes indicated in this week's report should be taken with even more caution that usual.]
On August 4, following a M9.3 class flare, a gamma-ray source coincident with the Sun was detected, reaching a integrated daily flux of (5.8 ± 0.6) e-6 with a test statistic of 384.

Fluxes are in the unit of photons/cm2/s above 100 MeV. All errors are statistical only.

Note. All the fluxes reported above should be considered preliminary and should not be used for publication, however they are indicative of the flux range and the current status of a source. Source association is done on the basis of source location, considering spatial coincidence only, and it is not indicative of an identification.

- Please acknowledge the LAT team if you use information from this report.

For questions and comments please contact:

- Alice Allafort (allafort@stanford.edu) for generic information related to this week.

- Contact persons on this page for individual sources cited above.

Fermi LAT weekly report N. 164

2011-08-11T07:19:00.000-07:00

Covered period: July 25 2011- July 31 2011

LAT Mission week: 164.57 - 165.57

PKS 1510-089 (z=0.36) detected with flux greater than 1.0 X 10^-6 on July 25, 26, 27, 28, 30 and 31. The flux peaked at (7.3 ± 0.7) X 10 ^-6 on July 25th.

Sources with flux below 1.0 X 10^-6: 4C +38.41 (TS=61) flux = (0.7 ± 0.2) X 10^-6 July 25, J0505+0415 (TS=51) flux = (0.9 ± 0.3) ^-6 July 28, PKS 2142-75 (listed as unidentified) flux = (0.5 ± 0.2) X 10 ^-6 July 28, J0742+5444 (TS=49) flux = (0.2 ± 0.1) X 10^-6 July 29, J1033+6051 (TS=41) flux = (0.4 ± 0.2) X 10^-6 July 31

Fluxes are in the unit of photons/cm²/s above 100 MeV. All errors are statistical only.

Note. All the fluxes reported above are from the ASP analysis and should be considered preliminary and should not be used for publication, however they are indicative of the flux range and the current status of a source. Source association is done on the basis of source location, considering spatial coincidence only, and it is not indicative of an identification.
- Please acknowledge the LAT team if you use information from this report.

For questions and comments please contact:

- M. Dutka (ditko86@gmail.com) for generic information related to this week

- Contact persons on this page for individual sources cited above.

Fermi LAT weekly report N. 163

2011-07-25T08:06:00.000-07:00

Covered period: 2011 July 18-24

LAT Mission week: 163.57 - 164.57

PKS 1510-08, 4C 38.41 (B2 1633+38), and BL Lacertae were above the daily flux level of 1E-6 in some days of the week. PKS 1510-08 reached a flux level of about 6E-6 in the last 6h interval of July 24.

The other blazars of the week, detected at least one time in the daily analysis, are: S5 0716+71, B2 1520+31, PKS 0537-441, PKS 1424-41, PKS 2155-304, PKS 2326-502, PKS 2142-75, S4 1749+70, PKS 0454-234, TXS 2247-283 (PMN J2250-2806), PKS 0301-243, 4C 55.17, 4C 38.41, PMN J2345-1555.

Other blazars detected on the weekly timescale with an averaged weekly flux above 0.4e-6 are: 3C 279, PKS 1830-211, 4C 28.07, PKS 1622-253.

Fluxes are in the unit of photons/cm^2/s above 100 MeV.

Note. All the flux reported above are by the ASP analysis and should be considered preliminary and should not be used for publication, however they are indicative of the flux range and the current status of a source. Source association is done on the basis of source location, considering spatial coincidence only, and it is not indicative of an identification. - Please acknowledge the LAT team if you use information from this report.

For questions and comments please contact:

- S. Ciprini (stefano.ciprini[at]pg.infn.it) for generic information related to this week

- Contact persons on this page for individual sources cited above.

Fermi LAT weekly report N. 161

2011-07-13T04:14:00.000-07:00

Covered period: 2011.Jul.04 - 2011.Jul.10

LAT Mission week: 161.57 - 162.57

An increasing gamma-ray activity from PKS 1510-089 was detected since July 1, 2011. On July 4 the source reached a gamma-ray flux (E > 100 MeV) of (8.3+/-1.0)e-6 in the daily time scale and a flux of (12.0+/-1.9)e-6 in the 6-hour interval starting at 06:00 UT of the same day (ATel#3473).
A decrease of the activity was detected in the following days (July 5-8) with a daily flux between (1.5+/-0.6)e-6 and (2.1+/-0.5)e-6.

A gamma-ray flare from the flat spectrum radio quasar CGRaBS J1849+6705 was detected on July 6, 2011, with a daily flux of (2.5+/-0.3)e-6 (ATel#3478).

A gamma-ray flare from the flat spectrum radio quasar PKS 0235-618 was detected on July 10, with a daily flux of (1.1+/-0.2)e-6.

4C +38.41 detected bright all the week, with a daily flux between (1.2+/-0.2)e-6 and (2.2+/-0.4)e-6.

BL Lac detected between July 4 and 9, with a decreasing flux from (1.3+/-0.3)e-6 to (0.5+/-0.2)e-6.

SBS 1150+497 detected between July 4 and 6, with a daily flux between (0.3+/-0.1)e-6 and (0.7+/-0.2)e-6.

B2 1520+31 detected on July 4, 7, and 8, with a daily flux between
(0.4+/-0.2)e-6 and (0.7+/-0.2)e-6.

S5 0716+714 detected on July 6, 9 and 10, with a daily flux between (0.6+/-0.2)e-6 and (0.9+/-0.2)e-6.

Sporadic daily detections of blazars: PKS 0208-512 (July 4 and 5),
PMN J2345-1555 (July 4 and 7), PKS 0537-441 (July 5), Mrk 421 (July 7), PKS 1622-253 (July 7), PKS 0250-225 (July 10).

Fluxes are in the unit of photons/cm²/s above 100 MeV. All errors are statistical only.

Note. All the fluxes reported above are from the ASP analysis and should be considered preliminary and should not be used for publication, however they are indicative of the flux range and the current status of a source. Source association is done on the basis of source location, considering spatial coincidence only, and it is not indicative of an identification.
- Please acknowledge the LAT team if you use information from this report.

For questions and comments please contact:

- F. D'Ammando (dammando[at]ifc.inaf.it) for generic information related to this week

- Contact persons on this page for individual sources cited above.

Fermi LAT weekly report N.160

2011-07-12T19:49:00.000-07:00

Covered period: 2011.Jun.27 - 2011.Jul.03

LAT Mission week: 160.57 - 161.57

On June 28 BL Lacertae shows an unusual gamma-ray spectrum with a photon number power-law index of 1.70 +/-0.15 (ATel #3462) in agreement with the TeV flare detection from VERITAS.
PKS 1510-089 continues its high activity reaching a daily flux around (4.2 +/- 0.7)X 10^-6 on Jul 03.

3C 279 and 4C 38.41 (B2 1633+38) bright for most of this week (daily flux approaching and around 1 X 10^-6).

B2 1520+31, PKS 0537-441, PKS 0250–225, PMN J2345–1555,PKS 1424–41, PKS 0521–36, MKN 421 detected in one or two days of the week (flux below 1 X 10^-6 ).

Fluxes are in the unit of photons/cm²/s above 100 MeV. All errors are statistical only.

Fermi LAT weekly report N.159

2011-07-12T10:00:00.000-07:00

Covered period: 2011.Jun.20 - 2011.Jun.26

LAT Mission week: 159.57 - 160.57

CRATES J1239+0443 detected also this week with a low daily flux in the range 0.4-0.5 X 10^-6 on Jun. 20 and 22 and flaring with flux (1.1 +/- 0.4) X 10^-6 on Jun. 23.

B2 1520+31 detected from Jun. 22 to Jun. 26 with daily flux in the range 0.5-1.2 X 10^-6.

4C +38.41 detected from Jun. 24 to Jun. 26 with daily flux in the range 0.9-1.6 X 10^-6.

BL Lac detected on Jun. 23 and 24 with daily flux in the range 0.7-1.1 X 10^-6.

The radio-loud narrow-line Sy1 galaxy SBS 0846+513 was detected on Jun. 21 with daily flux of (0.8+/-0.2) X 10^-6 (see ATel#3452).

Sporadic activity (fluxes above 1.0 X 10^-6) observed from CGRaBS J0948+0022 (1.1 on Jun. 20), 3C 279 (1.1 on Jun. 26), PKS 1510-08 (3.6 on Jun. 26).

Sporadic activity (fluxes below 1.0 X 10^-6) observed from 4C +28.07 (0.5 on Jun. 21), PKS 0250-225 (0.7 on Jun. 23), CGRaBS J0721+7120 (0.6 on Jun. 20), CRATES J0742+5444 (0.5 on Jun. 20), CGRaBS J1849+6705 (0.7 on Jun. 20), PKS 1055+01 (0.4 on Jun. 20), 1150+497 (0.4 on Jun. 24), PKS 1502+106 (0.8 on Jun. 23), CGRaBS J1849+6705 (0.4 on Jun. 22), PKS 2032+107 (0.5 on Jun. 24), PMN J2345-1555 (0.8 on Jun. 20).

Fluxes are in the unit of photons/cm²/s above 100 MeV. All errors are statistical only.

Note. All the fluxes reported above are from the ASP analysis and should be considered preliminary and should not be used for publication, however they are indicative of the flux range and the current status of a source. Source association is done on the basis of source location, considering spatial coincidence only, and it is not indicative of an identification.
- Please acknowledge the LAT team if you use information from this report.

For questions and comments please contact:

- D. Donato (donato[at]milkyway.gsfc.nasa.gov) for generic information related to this week

- Contact persons on this page for individual sources cited above.

Fermi LAT weekly report N. 158

2011-06-28T03:56:00.000-07:00

Covered period: 2011.Jun.13 - 2011.Jun.19

LAT Mission week: 158.57 - 159.57

FSRQs MG1 J123931+0443 (z=1.762) and GB6 J0742+5444 ( z=0.72) both active during the week and both flaring on June 19 (daily flux 1.1 +/- 0.3 X 10^-6 and daily flux 1.0±0.2 X 10^-6 respectively). See ATel#3445.

3C 279 bright during this week (flux approaching and around 1 X 10^-6).

PMN J0948+0022 detected on June 19 with daily flux around 1.4 X 10^-6 .

PKS 1830-211, 4C +38.41, B2 1520+31, PKS 0537-441, PKS 2326–502, PMN J2345-1555, BL Lac detected in one or two days of the week (flux below 1 X 10^-6 ).

Fluxes are in the unit of photons/cm²/s above 100 MeV. All errors are statistical only.

Note. All the fluxes reported above are from the ASP analysis and should be considered preliminary and should not be used for publication, however they are indicative of the flux range and the current status of a source. Source association is done on the basis of source location, considering spatial coincidence only, and it is not indicative of an identification.
- Please acknowledge the LAT team if you use information from this report.

For questions and comments please contact:

- D. Gasparrini (gasparrini@asdc.asi.it) for generic information related to this week

- Contact persons on this page for individual sources cited above.

Fermi LAT weekly report N. 157

2011-06-15T02:23:00.000-07:00

Covered period: 2011 June 6-12

LAT Mission week: 157.57 - 158.57

Bright gamma-ray flaring emission from the Sun on June 7 with an increase of two orders of magnitude with respect to quiet solar disk emission. See ATel#3417.

Flare of flat spectrum radio quasar PKS 1622-253 on June 7 (daily flux (2.0 ± 0.3) E-6). See ATel#3424.

Flare of the narrow-line Seyfert-1 galaxy PMN J0948+0022 (daily flux (1.5 ± 0.3) E-6). See ATel#3429.

Other bright blazars in daily intervals of the week: CTA 102, BL Lacertae, S5 0716+71, 3C 279, B2 1520+31, OX 169.

Other daily-detected blazars during the week: PMN J2345–1555, PKS 2155-304, 3C 454.3, Mkn 501, Mkn 421, PKS 2326-502, PKS 1244-255, S4 1749+70, PKS 2326-502, PKS 0537-441, GB6 J0742+5444, 4C 28.07, 4C 21.35, S5 0836+71, S4 1849+67.

Fluxes are in the unit of photons/cm^2/s above 100 MeV.

Note. All the flux reported above are by the ASP analysis and should be considered preliminary and should not be used for publication, however they are indicative of the flux range and the current status of a source. Source association is done on the basis of source location, considering spatial coincidence only, and it is not indicative of an identification. - Please acknowledge the LAT team if you use information from this report.

For questions and comments please contact:

- S. Ciprini (stefano.ciprini[at]asdc.asi.it) for generic information related to this week

- Contact persons on this page for individual sources cited above.

Fermi LAT weekly report N. 156

2011-06-14T07:47:00.000-07:00

Covered period: 2011.May.30 - 2011.June.05

LAT Mission week: 156.57 - 157.57

PMN J1123-6417 was detected in flaring state on May 30, with a daily flux of (1.4+/-0.4)e-6 (ATel #3394). PMN J1123-6417 is a likely AGN of uncertain type at a Galactic latitude, b=-3 deg. This association is confirmed also by Mahony et al. (2010) using the AT20G survey catalog. No redshift is known for this object.

A gamma-ray flare from the high-redshift (z=2.07) blazar PKS 0528+134 was detected on June 5, 2011, with a daily flux of (1.1+/-0.4)e-6 (ATel #3412).

PKS 1622-253 detected in flaring state on June 4 and 5, with a daily flux of (1.1+/-0.3)e-6 and (1.0+/-0.3)e-6, respectively. This high activity reached a peak flux of (2.0+/-0.3)e-6 on June 7 and has continued in the following days, as reported in the ATel #3424.

CTA 102 detected very bright on 31 May, with a daily flux of (2.5+/-0.5)e-6.

PMN J2345-1555 detected in high state between 30 May and 3 June, with a decreasing flux from (1.0+/-0.2)e-6 to (0.7+/-0.2)e-6.

4C +38.41 detected bright on May 30, May 31, and June 2, with daily flux between 1.1e-6 and 1.3e-6.

B2 1520+31 detected in high state on June 4 and 5, with a daily flux of (1.0+/-0.3)e-6 and (1.4+/-0.4)e-6, respectively.

NGC 1275 detected in high state on May 31, June 1 and June 4 with a daily flux between (0.9+/-0.3)e-6 and (0.3+/-0.1)e-6.

BL Lac detected on May 30, May 31 and June 4, with a daily flux between 0.6e-6 and 0.8e-6.

3C 279 detected bright on June 2 and 3, with a daily flux between 1.0e-6 and 1.2e-6.

Sporadic daily detections of blazars: CGRaBS J1849+6705 (June 1), CRATES J0850+4854 (June 2), PKS 1424-41 (June 2), PKS 2052-47 (June 2).

Fluxes are in the unit of photons/cm²/s above 100 MeV. All errors are statistical only.

Note. All the fluxes reported above are from the ASP analysis and should be considered preliminary and should not be used for publication, however they are indicative of the flux range and the current status of a source. Source association is done on the basis of source location, considering spatial coincidence only, and it is not indicative of an identification.
- Please acknowledge the LAT team if you use information from this report.

For questions and comments please contact:

- F. D'Ammando (dammando[at]ifc.inaf.it) for generic information related to this week

- Contact persons on this page for individual sources cited above.

2011-05-26T08:28:00.000-07:00

Covered period: 2011.May.15 - 2011.May.22

LAT Mission week: 154.57 - 155.57

BL Lac is detected in a high state all week reaching a flux of 1.4e-6 on 20th May; see ATel #3368 and the follow up Atels in which optical/X-ray brightening has been reported (#3371, #3375 and #3377).
4C +38.41 is very active all week reaching a flux of (1.5 ± 0.3) e-6.
4C 49.22 is in high state all week, with a flux of (1.3± 0.3)e-6 on 17th May.
CTA 102 detected on 18th and 19th May.
4C +21.35, PKS 0521-36, PKS 0537-441, PMN J2345-1555 and 3C279, 3C66A are detected during the week.
Referring to the AGILE ATel (#3357) on AGL 2302-3251, we do not confirm the detection in the soft energy band (100MeV-400MeV).

Fluxes are in the unit of photons/cm²/s above 100 MeV. All errors are statistical only.

Note. All the fluxes reported above are from the ASP analysis and should be considered preliminary and should not be used for publication, however they are indicative of the flux range and the current status of a source. Source association is done on the basis of source location, considering spatial coincidence only, and it is not indicative of an identification.
- Please acknowledge the LAT team if you use information from this report.

For questions and comments please contact:

- S. Cutini (sara.cutini[at]asdc.asi.it) for generic information related to this week

- Contact persons on this page for individual sources cited above.

Fermi LAT weekly report N. 153

2011-05-26T06:23:00.000-07:00

Covered period: 2011 May 9-15

LAT Mission week: 153.57-154.57

Highlights of this week:

Detection of gamma ray activity from blazar PKS 0208-512 with a flux of (1.1 +/- 0.3)E-6. This was reported in ATel #3338

CTA 102 brightened on May 11, up to a flux of (1.6 ± 0.4) E-6, which is above the level reported in a recent telegram from May 3 (ATel #3320)

Blazar SBS 1150+497 (also known as as 4C 49.22, OM 484) became active this week after a one month hiatus following a short flare on April 15 (ATEL #3313). Back then there were two possible AGN counterparts to the gamma-ray source, but follow-up observations have revealed a contemporaneous increase in flux at GeV, X-ray and NIR (ATEL#3317) wavelengths, which confirms the identification of the Fermi source with SBS 1150+497. A peak flux of (3.4 +/- 0.6)E-6 was observed by Fermi LAT during a 12hr interval on May 15, but since then the source has been detected at a more moderate flux of aprox. 1 E-6.

4C +38.41 remains bright this week, with daily fluxes consistently around 1.3 E-6 for most days and as high as ( 2.5 +/- 0.4) E-6 on May 15

Other daily detections of blazars this week: PKS 1244-255, 3C 279, 4C +28.07, PKS 0537-441, Mkn 421, PKS 2155-304, CRATES J1239+0443, 3C 454.3, BL Lac, PMN J2345-1555

Fluxes are in the unit of photons/cm²/s above 100 MeV. All errors are statistical only.

Note. All the flux reported above are by the Fermi LAT Automated Science Processing (ASP) analysis and should be considered preliminary and should not be used for publication, however they are indicative of the flux range and the current status of a source. Source association is done on the basis of source location, considering spatial coincidence only, and it is not indicative of an identification. - Please acknowledge the LAT team if you use information from this report.

For questions and comments please contact:

- A. Szostek (aszostek[at]slac.stanford.edu) and L. Reyes (lcreyes [at] uchicago.edu) for generic information related to this week

- Contact persons on this page for individual sources cited above.

Fermi LAT weekly report N. 152

2011-05-26T06:21:00.000-07:00

Covered period: 2011 May 2-8

LAT Mission week: 152.57-153.57

Highlights of this week:

4C +38.41 became active this week, with a flux hovering around 10^-6 at the beginning of the week and then peaking on May 8 at the level of (2.1 +/- 0.3) E-6. The flare was reported in ATel #3333. High state in NIR was also reported in ATel #3335.

A gamma-ray flare from the blazar S5 1803+78 was detected on May 2 and May 3, at a level of (1.1 +/- 0.2)E-6. The flare was short-lived since on May 4 the source was not detected by Fermi LAT. Optical follow-up observations, also on May 4, found the source at an average brightness (ATEL#3323).

Another short flare detected by Fermi LAT this week was attributed to blazar PKS 1424-41, which on May 5 reached a flux of (1.1 +/- 0.3)E-6, representing more than an order of magnitude increase over the average flux reported in the first Fermi-LAT catalog. The observed flux is comparable with a previous flare observed on April 23, 2010 (Atel #2583).

Other daily detections of blazars this week: PKS 1244-255, PKS 0537-441, 4C +28.07, 4C +21.35, 3C 279, B2 1520+31, PMN J2345-1555, CRATES J0742+5444, PKS 0208-512

Fluxes are in the unit of photons/cm²/s above 100 MeV. All errors are statistical only.

Fermi LAT weekly report N. 151

2011-05-09T03:21:00.000-07:00

Covered period: 2011 Apr.25-May.1

LAT Mission week: 151.57 - 152.57

Flare of CTA 102 (daily flux (1.4+/-0.3)E-6 on April 29, 2011. This is
the first firm daily detection too since the beginning of the mission. See ATel#3320

Flare of PKS 0521-36 on April 25 (daily flux (1.6 ± 0.4) E-6).

PKS 1510-08 active during the week around 1E-6.

NGC 1275 detected on April 30, 2011.

Other daily detection of blazars during the week: PKS 1244-255, PKS 1510-08, 3C 279, B2 1520+31, PMN J2345-1555, 3C 454.3, PKS 0537–441, 4C 38.41, B2 0321+33B, PKS 1502+106, B2 1633+38, PKS 0906+01, PKS 1424-41, 4C 28.07 (B2 0234+28), GB6 J0742+5444, PMN J0531-4827

Fluxes are in the unit of photons/cm^2/s above 100 MeV.

Note. All the flux reported above are by the ASP analysis and should be considered preliminary and should not be used for publication, however they are indicative of the flux range and the current status of a source. Source association is done on the basis of source location, considering spatial coincidence only, and it is not indicative of an identification. - Please acknowledge the LAT team if you use information from this report.

For questions and comments please contact:

- S. Ciprini (stefano.ciprini[at]pg.infn.it) for generic information related to this week

- Contact persons on this page for individual sources cited above.

Fermi LAT weekly report N. 150

2011-05-08T05:01:00.000-07:00

Covered period: 2011 Apr.18-Apr.24

LAT Mission week: 150.57 - 151.57

Crab Nebula fading since peak on Apr. 14, but still above average for the pulsar + nebula until Apr. 19. The TOO observation continued from the previous week until Apr. 19. This reduced daily exposure on some portions of the sky during that time.

Detection of a flare from a new LAT source near S4 1150+49 (4C 49.22) with GB6 J1152+4939 (BZQ J1152+4939) just outside the error circle. See ATel 3313.

Flare associated with PKS 1622–253 to (1.6 +/- 0.4) E-6 on April 18, 2011. Previously active in October 2009 (ATel 2231).

PKS 0521–36 active this week reaching a flux of (1.8 ± 0.4) e-6 on Apr. 23.

B2 1520+31 flared to (1.4 +/- 0.4) e-6 on Apr. 22.

Some activity throughout the week from 3C 279 reaching 1.1 ± 0.3 E-6 on Apr. 21.

Other daily detection of blazars during the week: PKS 1510–089, 3C 454.3.

Fluxes are in the unit of photons/cm^2/s above 100 MeV.

Note. All the flux reported above are by the ASP analysis and should be considered preliminary and should not be used for publication, however they are indicative of the flux range and the current status of a source. Source association is done on the basis of source location, considering spatial coincidence only, and it is not indicative of an identification. - Please acknowledge the LAT team if you use information from this report.

For questions and comments please contact:

- E. Hays (elizabeth.a.hays[at]nasa.gov) for generic information related to this week

- Contact persons on this page for individual sources cited above.

Fermi LAT weekly report N. 149

2011-04-20T02:38:00.000-07:00

Covered period: 2011.April.11 - 2011.April.17

LAT Mission week: 149.57 - 150.57

A renewed increase of the gamma-ray activity from a source positionally consistent with the Crab Nebula was detected by Fermi-LAT starting from the period April 9-11, 2011 (ATel #3276).
Fermi has interrupted all-sky scanning mode between 2011-04-12 16:47 UTC and 2011-04-19 15:49:43 UTC for a dedicated pointing observation of the Crab Nebula. The ATel #3276 promptly issued at the beginning of this new outburst phase triggered also early ToO observations by Swift (ATel #3279) and Chandra (ATel #3283).
A subsequent extreme gamma-ray outburst was detected in the period April 14-16 (see ATel #3284), with a peak flux of (21.4 +/- 0.7) x10^-6 ph/cm2/sec (statistical errors only) on April 16, confirmed also by AGILE observations (ATel #3286).

3C 279 was detected in a very high state on Apr. 17, with daily flux of (3.3+/-1.0)e-6.

Sporadic daily detections of blazars: PMN J2345-1555 (Apr. 11), PKS 1510-08 (Apr. 11), S5 0716+714 (Apr. 14), CRATES J0850+4854 (Apr. 14).

Fluxes are in the unit of photons/cm²/s above 100 MeV. All errors are statistical only.

Note. All the fluxes reported above are from the ASP analysis and should be considered preliminary and should not be used for publication, however they are indicative of the flux range and the current status of a source. Source association is done on the basis of source location, considering spatial coincidence only, and it is not indicative of an identification.
- Please acknowledge the LAT team if you use information from this report.

For questions and comments please contact:

- F. D'Ammando (dammando[at]ifc.inaf.it) for generic information related to this week

- Contact persons on this page for individual sources cited above.

Fermi LAT weekly report N. 148

2011-04-17T12:53:00.000-07:00

Covered period: 2011 Apr.4-Apr.10

LAT Mission week: 148.57 - 149.57

The latter half of this week saw the start of increased activity from the Crab Nebula with an increase in flux by a factor of >2, see ATel#3726. On the 9th, the daily flux reached (4.7 +/- 0.6) e-6 with a 6 hour flux of (5.7 +/- 0.7) e-6.

3C454.3 was detected throughout the week with an average daily flux of 1.3e-6.

PKS 1622-253 exhibited a flare this week, detected on 5 days with an average daily flux of 1.2e-6 and reached a high flux of (1.5 +/- 0.4) e-6 on the 10th.

1510-089 was detected at a high flux of (2.1 +/- 1.0) e-6 on the 10th.

PWN J2345-1555 was detected most days this week with an average daily flux of 0.7e-6

B2 2308+34 and 4C+38.41 were both detected on 3 days during the first half of the week with average daily fluxes of 1.2e-6 and 0.9e-6, respectively, while PKS 1520+31 was seen on 3 days in the second half of the week at an average daily flux of 0.9e-6.

Sporadic activity from 4C+01.01, 3C273, 3C279, Mrk421, PKS 2155-304, 1ES2322-409, PKS 0537-441, PKS 1502+106, PKS 1424+41 and CRATES J0742+5444.

Fluxes are in the units of photons/cm^2/s above 100 MeV.

Note. All the fluxes reported above are by the ASP analysis and should be considered preliminary and should not be used for publication; however they are indicative of the flux range and the current status of a source. Source association is done on the basis of source location, considering spatial coincidence only, and it is not indicative of an identification. - Please acknowledge the LAT team if you use information from this report.

For questions and comments please contact:

- A. Cannon (annacannon1984@gmail.com) for generic information related to this week

- Contact persons on this page for individual sources cited above.

Fermi LAT weekly report N. 147

2011-04-07T00:38:00.000-07:00

Covered period: 2011 Mar.28-Apr3

LAT Mission week: 147.57 - 148.57

Flare of S5 0836+71 (4C 71.07, z=2.218) on April 3, with daily flux (1.2+/-0.3)E-6. ATel#3260 issued. A high-z, luminous gamma-ray MeV-peaked blazar (being detected in the past by INTEGRAL, COMPTEL, EGRET), interesting for its intervening system, intrinsic absorbing environment and peculiarly-structured jet.

Flare of nearby blazar OX 169 (S3 2141+17, z=0.210) on March 30 (daily flux 1.2+/-0.3)E-6.

3C 454.3 faded below the daily flux level of 1E-6 during the week.

Mkn 421 and PKS 0537-441 were rather active and detected all days (Mkn 421 below 0.4E-6, PKS 0537-441 reaching 0.7E-6 on April 3).

Other daily detection of blazars below daily flux level of 1E-6:
RX J1509.7+5556, PKS 2155-304, B2 1520+31, PMN J2345-1555, 1ES 2322-409, 4C 14.23, 3C 66A, GB6
J0742+5444.

GRB 110328B of March 28 is not detectable by the LAT using the standard 0.1-300 GeV dataset. Detectable if the lower energy threshold is reduced to 50 MeV
(GCN 11835 issued).

Fluxes are in the units of photons/cm^2/s above 100 MeV.

Note. All the fluxes reported above are by the ASP analysis and should be considered preliminary and should not be used for publication; however they are indicative of the flux range and the current status of a source. Source association is done on the basis of source location, considering spatial coincidence only, and it is not indicative of an identification. - Please acknowledge the LAT team if you use information from this report.

For questions and comments please contact:

- S. Ciprini (stefano.ciprini[at]asdc.asi.it) for generic information related to this week

- Contact persons on this page for individual sources cited above.

Fermi LAT weekly report N.146

2011-04-05T00:55:00.000-07:00

Covered period: 2011.Mar.21 - 2011.Mar.27

LAT Mission week: 146.57 - 147.57

3C 454 detected between March 21 and 27 with daily flux in the range 1.8-5.3 X 10^-6.

Mkr 421 detected almost all week with daily flux in the range 0.1-0.8 X 10^-6.

Mkr 501 detected on March 24 and 25 with daily flux of 0.1 X 10^-6 and 0.2 X 10^-6, respectively.

CRATES J0742+5444 (GB6 J0742+5444) detected between March 23 and 26 with daily flux in the range 0.4-0.8 X 10^-6.

Sporadic activity observed from PKS 0250-225, S5 0716+71, 4C +38.41. All fluxes below 1.0 X 10^-6.

The high state of Cygnus X-3 on March 22 was reported by Fermi collaboration in Atel#3233. Furthermore, a TOO pointed mode observation for Cyg X-3 was performed by Fermi between 25 and 28 March.

Fluxes are in the unit of photons/cm²/s above 100 MeV. All errors are statistical only.

Note. All the fluxes reported above are from the ASP analysis and should be considered preliminary and should not be used for publication, however they are indicative of the flux range and the current status of a source. Source association is done on the basis of source location, considering spatial coincidence only, and it is not indicative of an identification.
- Please acknowledge the LAT team if you use information from this report.

For questions and comments please contact:

G. pivato (giovanna.pivato[at]pd.infn.it) for generic information related to this week

Contact persons on this page for individual sources cited above.

Fermi LAT weekly report N. 145

2011-04-04T07:12:00.000-07:00

Covered period: 2011.Mar.14 - 2011.Mar.20

LAT Mission week: 145.57 - 146.57

4C +38.41 Detected with daily flux greater than 1.0 X 10^-6 on March 14,15 and 19. The peak flux was (2.1 +/- 0.4) X 10^-6 on March 15th. Swift observations of this source were performed on March 16 to March 21

3C454.3 Detected everyday during the week with flux between 3.0-4.0 X 10^-6.

Sources with flux below 1.0 X 10^-6 - 4C+21.35 flux = (0.8 +/- 0.3) X 10^-6; PKS 0537-441 flux = (0.6 +/- 0.2) X 10^-6 March 16, (0.5 +/- 0.2) X 10^-6 March 18, (0.4 +/- 0.1) March 20; CRATES J0742+5444 flux = (0.9 +/- 0.2) X 10^-6 March 17, (0.7 +/- 0.2) X 10^-6 March 18, (0.4 +/- 0.2) X 10^-6 March 20; B2 2308+34 flux = (0.3 +/- 0.1) X 10^-6 March 18; CGRaBS J1033+6051 flux = (0.5 +/- 0.2) X 10^-6 March 18

Fluxes are in the unit of photons/cm²/s above 100 MeV. All errors are statistical only.

Note. All the fluxes reported above are from the ASP analysis and should be considered preliminary and should not be used for publication, however they are indicative of the flux range and the current status of a source. Source association is done on the basis of source location, considering spatial coincidence only, and it is not indicative of an identification.
- Please acknowledge the LAT team if you use information from this report.

For questions and comments please contact:

- Michael Dutka (ditko86@gmail.com) for generic information related to this week

- Contact persons on this page for individual sources cited above.

Fermi LAT weekly report N.142

2011-02-28T12:58:00.000-08:00

Covered period: 2011.Feb.21 - 2011.Feb.27

LAT Mission week: 142.57 - 143.57

Mkn 421 detected on Feb. 24 and 27 with daily flux in the range 0.3-0.5 X 10^-6.

PKS 0537-441 detected on Feb. 21 and 24 with daily flux in the range 0.8-1.1 X 10^-6.

PKS 1622-253 detected on Feb. 25 and 27 with daily flux in the range 1.0-1.8 X 10^-6.

S4 1749+70 detected in 4 days after Feb. 24 with daily flux in the range 0.5-1.3 X 10^-6.

4C 21.35 detected on Feb. 25 and 27 with daily flux in the range 0.7-1.0 X 10^-6.

3C 454.3 was moderately bright and constant all week, with daily flux between 3.1 and 4.0 X 10^-6.

Sporadic activity (fluxes above 1.0 X 10^-6) observed from 1510-089 (1.4 X 10^-6 on Feb. 25), CRATES J0742+5444 (1.2 X 10^-6 on Feb. 26, ATel#3196), B2 2308+34 (1.1 X 10^-6 on Feb. 21).

Sporadic activity (fluxes below 1.0 X 10^-6) observed from PKS 1124-186 (0.4 X 10^-6 on Feb. 27), PKS 0716+714 (0.5 X 10^-6 on Feb. 26), AP Lib (0.4 X 10^-6 on Feb. 21, ATel#3187 on the 6-hr run flare), 3C 279 (0.8 X 10^-6 on Feb. 26), B3 1708+433 (0.9 X 10^-6 on Feb. 26)

Fluxes are in the unit of photons/cm²/s above 100 MeV. All errors are statistical only.

Note. All the fluxes reported above are from the ASP analysis and should be considered preliminary and should not be used for publication, however they are indicative of the flux range and the current status of a source. Source association is done on the basis of source location, considering spatial coincidence only, and it is not indicative of an identification.
- Please acknowledge the LAT team if you use information from this report.

For questions and comments please contact:

- D. Donato (donato[at]milkyway.gsfc.nasa.gov) for generic information related to this week

- Contact persons on this page for individual sources cited above.

Fermi LAT weekly report N.141

2011-02-23T08:52:00.000-08:00

Covered period: 2011.Feb.14 – 2011.Feb.20

LAT Mission week: 141.57 - 142.57

The BL Lac object CGRaBS 1 748+7005 (also known as S4 1749+70) was detected in flaring state on Feb. 15, with a daily flux of 0.7 × 10^–6 (ATel #3171)

3C 454.3 was detected all week long (daily flux between 2.4 and 4.0 × 10^–6).

PKS 0521-36 was seen at flux = 1.1 × 10^–6 on Feb. 16 and 18.

PKS 2155-304 was detected throughout the week and in high state with a peak occurring on Feb. 18 flux = 1.7 × 10^–6

PKS 1622-253 was detected with flux = 0.9 × 10^–6 on Feb. 19.

CGRaBS J1748+7005, GB6 J0742+5444, PKS 2326-502 were detected almost all week.

Sporadic activity observed from Mrk 421, 4C +38.41, B3 1708+433, PKS 0537–441. All fluxes below 1.0 × 10^–6.

Fluxes are in the unit of photons cm^–2s^–1 above 100 MeV. All errors are statistical only.

For questions and comments please contact:

- S. Buson (sara.buson[at]pd.infn.it) for generic information related to this week

- Contact persons on this page for individual sources cited above.

2011-02-22T07:46:00.000-08:00

Covered period: 2011.Feb.07 – 2011.Feb.14

LAT Mission week: 140.57 - 141.57

3C 454.3 was detected all week long (daily flux between 2.1 and 3.4 × 10^–6).

PKS 2326–502 was detected sporadically throughout the week with a peak flux occurring on Feb 7 (1.5 × 10^–6).

B2 1520+31 faded out after last week performance, being detected only the first two days (0.7-0.8 × 10^–6).

PKS 1622–253 was detectable the first three days of the week (daily flux of 1.5, 1.7 and 1.1 × 10^–6 respectively).

HB89 2149–307 flared on Feb 9 at (1.1 ± 0.3) × 10^–6.

PKS 0521–36 was detected on Feb 8-10 reaching a peak flux occurring on the 10 at (1.7 × 10^–6).

J123939+044409 flared on Feb 10 at (1.0 ± 0.3) × 10^–6.

BL Lac underwent a flare on Feb 11 at (1.0 ± 0.3) × 10^–6.

CRATES J1239+0443 on flare on Feb 13 at (1.2 ± 0.3) × 10^–6.

LS I+61 303 quite active all week, with a peak daily flux of (1.5 ± 0.3) × 10^–6 on Feb 8 and 11.

Sporadic activity observed from B2 1520+31 (7-8 Feb), 4C +38.41 (Feb 8), 1633+382 (Feb 8), PKS 0537–441 (Feb 9, 11 and 13), PKS 0402–362 (Feb 10 and 12), PKS 2155–304 (Feb 10 and 13) and B3 1708+433 (11-12 Feb). All fluxes below 1.0 × 10^–6.

Fluxes are in the unit of photons cm^–2s^–1 above 100 MeV. All errors are statistical only.

For questions and comments please contact:

- D. Bastieri (denis.bastieri[at]pd.infn.it) for generic information related to this week

- Contact persons on this page for individual sources cited above.

Fermi LAT weekly report N. 139

2011-02-10T06:52:00.000-08:00

Covered period: 2011.Jan.31 - 2011.Feb.06

LAT Mission week: 139.57 - 140.57

3C 454.3 was detected all week long (daily flux between 2.8 and 4.1 X 10^-6).

B2 1520+31 continues to be active (daily flux between 0.3 and 1.7 X 10^-6).

PKS 2326-502 was detected sporadically throughout the week with a peak flux occurring on Feb. 6 (1.3 X 10^-6).

PKS 1622-253 was seen on Feb. 3 and on Feb. 6 (daily flux of 1.9 and 1.6 X 10^-6 respectively).

The region of Cygnus X-3 was intermittently active during the week with a peak flux seen on Feb. 4. This follows reports of increased gamma-ray activity from this object seen by AGILE (see A. Tels. 3151 and 3141)

4C +21.35 was detected at a daily flux of 1.2 + 0.3 X 10^-6 on Feb. 1

Sporadic activity observed from PKS 0402-502 (Jan. 31), PKS 0537-441 (Feb. 2 - 5), 4C +38.41 (Feb. 3), CRATES J0742+5444 (Feb. 5) and B2 2308+34 (Feb. 4 and 5). All fluxes below 1.0 X 10^-6.

Fluxes are in the unit of photons/cm²/s above 100 MeV. All errors are statistical only.

Note. All the fluxes reported above are from the ASP analysis and should be considered preliminary and should not be used for publication, however they are indicative of the flux range and the current status of a source. Source association is done on the basis of source location, considering spatial coincidence only, and it is not indicative of an identification.
- Please acknowledge the LAT team if you use information from this report.

For questions and comments please contact:

- J. S. Perkins (jeremy.s.perkins[at]nasa.gov) for generic information related to this week

- Contact persons on this page for individual sources cited above.

Fermi LAT weekly report N. 138

2011-02-04T05:42:00.000-08:00

Covered period: 2011.January.24 - 2011.January.30

LAT Mission week: 138.57 - 139.57

B21520+31 detected in high state for all the week reaching flux of (1.8+/-0.3)e-6 in the daily time scale on January 29.

PKS 0537-441 detected for all the week with daily flux between 0.1e-6 and 0.6e-6.

3C 454.3 fairly bright for all the week, with daily flux between 2.5e-6 and 6.4e-6.

Sporadic daily detections of blazars: MKR421 (27, 24 Jan.), PKS0727-11 (27 Jan.), PKS2326-502 (27, 26, 24 Jan.),
3C 66A (27 Jan.) CGRaBS J0211+105 (26, 28 Jan.) B2 0200+30 (25 Jan.), PKS B1222+216 (24 Jan.), PKS 1830-211 (24 Jan.),
OC 457 (27 Jan.), CGRaBS J0509+0541 (27, 26 Jan.) and CRATES J0742+5444 (26 Jan)

Fluxes are in the unit of photons/cm^2/s above 100 MeV.

Note. All the flux reported above are by the ASP analysis and should
be considered preliminary and should not be used for publication,
however they are indicative of the flux range and the current status
of a source.
Source association is done on the basis of source location,
considering spatial coincidence only, and it is not indicative of an
identification.
- Please acknowledge the LAT team if you use information from this report.

For questions and comments please contact:

-S. Cutini (sara.cutini@asdc.asi.it) for generic information related to this week.

Contact persons on this page for individual sources cited above.

Fermi LAT weekly report N. 137

2011-01-26T08:42:00.000-08:00

Covered period: 2011.January.17 - 2011.January.23

LAT Mission week: 137.57 - 138.57

The BL Lac object CGRaBS J0211+1051 (also known as MG1 J021114+1051) detected in flaring state on Jan. 23, with a daily flux of (1.0+/-0.3)e-6 (ATel #3120). The source was also detected on Jan. 20 and 21, with daily flux between 0.3e-6 and 0.6e-6.

4C +38.41 detected on Jan. 19, 21, and 23, with daily flux between 0.4e-6 and 1.3e-6.

PKS 2326-502 detected in flaring state on Jan. 20, with daily flux of (1.4+/-0.4)e-6.

B2 2308+34 detected in high state, with a daily flux of (1.0+/-0.3)e-6.

3C 454.3 bright all the week, with daily flux between 5.0e-6 and 7.9e-6.

PKS 0537-441 detected for all the week, with daily flux between 0.3e-6 and 0.5e-6.

B2 1520+31 detected on Jan. 18, 19, 21, 22, and 23, with daily flux between 0.4e-6 and 0.8e-6.

Sporadic daily detections of blazars: B2 0200+30 (Jan. 17), 4C +21.35 (Jan. 17), PKS 0447-439 (Jan. 18), B3 1708+433 (Jan. 19 and 21), PKS 0426-380 (Jan. 20), PKS 2155-304 (Jan. 20), NGC 1275 (Jan. 21), Mrk 421 (Jan. 23), and PKS 0727-11 (Jan. 23).

Fluxes are in the unit of photons/cm²/s above 100 MeV. All errors are statistical only.

Note. All the fluxes reported above are from the ASP analysis and should be considered preliminary and should not be used for publication, however they are indicative of the flux range and the current status of a source. Source association is done on the basis of source location, considering spatial coincidence only, and it is not indicative of an identification.
- Please acknowledge the LAT team if you use information from this report.

For questions and comments please contact:

- F. D'Ammando (dammando[at]ifc.inaf.it) for generic information related to this week

- Contact persons on this page for individual sources cited above.

Fermi LAT weekly report 136

2011-01-20T10:25:00.000-08:00

Covered period: 2011.Jan.10 - 2011.Jan.16

LAT Mission week: 136.57 - 137.57

3C454 detected every day during the week with an average daily flux 6.8 +/- 0.7 X 10^-6 and a high daily flux of 7.5 +/- 0.7 X 10^-6.

4C +38.41, 3C273 and PKS B1222+216 were detected on January 10th with fluxes of 1.1 +/- 0.3 X 10^-6, 1.2 +/- 0.4 X 10^-6 and 1.5 +/- 0.2 X 10^-6 respectivly. All three of these sources were quiet the rest of the week.

PKS 2326-502 bright on January 13th with a flux of 1.5 X 10^-6. Detected on January 14th and 15th as well with fluxes below 1.0 X 10^-6.

PKS 0537-441 detected on 6 days this week with and average flux of around 0.5 X 10^-6

NGC 1275,B3 1708+433,1633+382 and Mrk 421, are all detected on multiple days during the week with fluxes below 1.0 X 10^-6.

The FA scripts report strange results for daily run number 935 (January 15, 2011) the results for this FA report are quoted from the DRP

Fluxes are in the unit of photons/cm²/s above 100 MeV. All errors are statistical only.

Note. All the fluxes reported above are from the ASP analysis and should be considered preliminary and should not be used for publication, however they are indicative of the flux range and the current status of a source. Source association is done on the basis of source location, considering spatial coincidence only, and it is not indicative of an identification.
- Please acknowledge the LAT team if you use information from this report.

For questions and comments please contact:

- S. Ciprini (stefano.ciprini[at]pg.infn.it) for generic information related to this week

- Contact persons on this page for individual sources cited above.

Fermi LAT weekly report 134

2011-01-11T02:18:00.000-08:00

Covered period: 2010.Dec.27 - 2011.Jan.2

LAT Mission week: 134.57 - 135.57

3C454.3 was very bright all week, detected every day with an average daily flux of 9.2^-6 with a high daily flux of (11.7+/-1.1)^-6 on the 2nd January.

Increased activity from the FSRQ PKS 1830-211 was seen during the week with an average daily flux of 2.6^-6. The source reached a peak daily flux of (3.9 +/- 0.5)^-6 on the 30th December.

B2 0200+30 was detected on the first three days of the week with an average daily flux of 0.7^-6.

PKS 2326-502 and PKS 0537-441 were detected throughout the week with average daily fluxes of 0.7^-6 and 0.5^-6 respectively.

4C+21.35 was detected most days this week with an average daily flux of 1.3^-6.

3C279 was seen with an average daily flux of 0.5^-6 on 4 days this week.

PKS 2155-304 was also detected on 4 days this week with an average daily flux of 0.6^-6.

Sporadic activity from 1510-089, PKS 0601-70, PKS 0402-362, PKS 0426-380, PKS 0524-485, S4 1030+61, 1633+382, B2 1520+31, B2 2308+34, 4C+38.21 and Mrk 421.

Fluxes are in the unit of photons/cm²/s above 100 MeV. All errors are statistical only.

Note. All the fluxes reported above are from the ASP analysis and should be considered preliminary and should not be used for publication, however they are indicative of the flux range and the current status of a source. Source association is done on the basis of source location, considering spatial coincidence only, and it is not indicative of an identification.
- Please acknowledge the LAT team if you use information from this report.

For questions and comments please contact:

- A. Cannon (annacannon1984@gmail.com) for generic information related to this week

- Contact persons on this page for individual sources cited above.

Fermi LAT weekly report 135

2011-01-10T08:23:00.000-08:00

Covered period: 2011.Jan.3 - 2011.Jan.9

LAT Mission week: 135.57 - 136.57

1510-089 detected with daily flux around 0.5 X 10^-6.

PKS 0537-441 detected with daily flux in the range 0.3-0.9 X 10^-6.

PKS 1622-253 detected with daily flux in the range 0.6-1.4 X 10^-6.

PKS 2326-502 detected with daily flux in the range 0.4-1.4 X 10^-6.

4C 21.35 was relatively bright all week, with daily flux around 1.0 X 10^-6.

3C 454.3 was very bright all week, with daily flux above 9.5 and up to 18.6 X 10^-6.

Sporadic activity observed from 3C 279, OX 169, Mrk 421, 4C +38.41, B2 1520+31, B2 2308+34, B3 1708+433, CGRaBS J0509+0541, PKS 1124-186, PKS 1730-13, and PKS 0332-403. All fluxes below (or up to) 1.0 X 10^-6.

Fluxes are in the unit of photons/cm²/s above 100 MeV. All errors are statistical only.

Note. All the fluxes reported above are from the ASP analysis and should be considered preliminary and should not be used for publication, however they are indicative of the flux range and the current status of a source. Source association is done on the basis of source location, considering spatial coincidence only, and it is not indicative of an identification.
- Please acknowledge the LAT team if you use information from this report.

For questions and comments please contact:

- D. Donato (donato[at]milkyway.gsfc.nasa.gov) for generic information related to this week

- Contact persons on this page for individual sources cited above.

Fermi LAT weekly report N. 133

2011-01-07T07:14:00.000-08:00

Covered period: 2010 Dec.20-26

LAT Mission week: 133.57 - 134.57

3C 454.3 very bright, reaching a daily flux of about (23+/-1)E-6 on Dec.20. This blazar decreased slowly during the rest of the week.

PKS 2155-304, PKS 0537-441, PKS 0208-512, 3C 66A, PKS 2326-502, 3C 279, S4 1030+61, B2 2308+34, Mkn 421, Ton 599 are detected in some days of the week below the daily flux level of 1E-6.

PKS 1830-211 and 4C 21.35 fluctuating around 1E-6.

Possible detection of B2 0200+30

Fluxes are in the unit of photons/cm^2/s above 100 MeV.

Note. All the flux reported above are by the ASP analysis and should be considered preliminary and should not be used for publication, however they are indicative of the flux range and the current status of a source. Source association is done on the basis of source location, considering spatial coincidence only, and it is not indicative of an identification. - Please acknowledge the LAT team if you use information from this report.

For questions and comments please contact:

- S. Ciprini (stefano.ciprini[at]pg.infn.it) for generic information related to this week

- Contact persons on this page for individual sources cited above.

Fermi LAT weekly report N. 132

2011-01-07T07:07:00.001-08:00

Covered period: 2010 Dec.13-19

LAT Mission week: 132.57 - 133.57

3C 454.3 was extremely bright during the week. It has crossed the daily flux level of 20E-6 at the end of the week.

4C 21.35 and B2 2308+34 were above the daily flux level of 1E-6 during some days of the week.

Other daily detection of blazars below 1E-6 (PKS 0537-441, B2 1520+31, Ton 599, Mkn 421, PKS 2155-304, PKS 2326-502, PKS 0208-512, B2 1846+32A)

Fluxes are in the unit of photons/cm^2/s above 100 MeV.

Note. All the flux reported above are by the ASP analysis and should be considered preliminary and should not be used for publication, however they are indicative of the flux range and the current status of a source. Source association is done on the basis of source location, considering spatial coincidence only, and it is not indicative of an identification. - Please acknowledge the LAT team if you use information from this report.

For questions and comments please contact:

- S. Ciprini (stefano.ciprini[at]pg.infn.it) for generic information related to this week

- Contact persons on this page for individual sources cited above.

Fermi LAT weekly report N. 131

2010-12-14T00:27:00.000-08:00

Covered period: 2010.December.6 - 2010.December.12

LAT Mission week: 131.57 - 132.57

3C 454.3 very bright for all the week, with daily flux between 10.0E-6 and 15.0E-6.

PKS 0537-441 detected for all the week, with daily flux between 0.4E-6 and 1.0E-6.

NGC 1275 detected in high activity state on Dec. 6, with daily flux of (0.8+/-0.3)E-6.

B2 2308+34 detected in high activity state on Dec. 6, 9, and 12, with daily flux between 0.8E-6 and 1.0E-6.

PKS 2326-502 detected on Dec. 6, 11, and 12, with daily flux between 0.5E-6 and 1.0E-6.

4C +21.35 detected in high activity state on Dec. 6, 9, and 10, with daily flux between 0.7E-6 and 1.5E-6.

PKS 2155-304 detected on Dec. 6, 7, 10, and 12, with daily flux between 0.3E-6 and 0.4E-6.

Sporadic daily detections of blazars: 3C 279 (Dec. 6), Ton 599 (Dec. 6), PKS 0402-362 (Dec. 8), CGRaBS J2345-1555 (Dec. 8), and PKS 0426-380 (Dec. 9).

Fluxes are in the unit of photons/cm²/s above 100 MeV. All errors are statistical only.

Note. All the fluxes reported above are from the ASP analysis and should be considered preliminary and should not be used for publication, however they are indicative of the flux range and the current status of a source. Source association is done on the basis of source location, considering spatial coincidence only, and it is not indicative of an identification.
- Please acknowledge the LAT team if you use information from this report.

For questions and comments please contact:

- F. D'Ammando (dammando[at]ifc.inaf.it) for generic information related to this week

- Contact persons on this page for individual sources cited above.

Fermi LAT weekly report N. 130

2010-12-07T01:02:00.000-08:00

Covered period: 2010.Nov.29 - 2010.Dec.5

LAT Mission week: 130.57 - 131.57

PKS 0447-439 was detected in high activity state on Dec. 5, with a daily flux of (0.6+/-0.2)e-6.
VHE emission from this source was discovered by H.E.S.S. on November-December 2009 (ATel #2350). PKS 0447-439 has been associated with a BL Lac object at z ~ 0.2 (Perlman et al. 1998, ApJ 115, 1253) or with a Seyfert 1 galaxy located at a redshift of z=0.107 (Craig & Fruscione 1997, AJ, 114, 4).

3C 454.3 very bright for all the week, but with a decreasing daily flux from 24.0E-6 to 15.0E-6.

PKS 0537-441 detected for all the week, with daily flux between 0.4E-6 and 0.9E-6.

4C +21.35 detected on four consecutive days this week (Dec. 1-4), with increasing flux between 0.7E-6 and 2.8E-6.

PKS 2155-304 detected on Dec. 2, 4, and 5, with daily flux between 0.2E-6 and 0.4E-6.

PKS 2326-502 detected in high activity state on Dec. 3 and 4, with daily flux of 1.0e-6 and 1.3e-6, respectively.

Sporadic daily detections of blazars: PKS 0524-485 (Nov. 29), B2 1520+31 (Nov. 29), PKS 0402-362 (Nov. 30), B3 1708+433 (Nov. 30, Dec. 1), 3C 66A (Dec. 2), PKS 0336-01 (Dec. 3), CRATES J2237-3921 (Dec. 3).

Fluxes are in the unit of photons/cm²/s above 100 MeV. All errors are statistical only.

Note. All the fluxes reported above are from the ASP analysis and should be considered preliminary and should not be used for publication, however they are indicative of the flux range and the current status of a source. Source association is done on the basis of source location, considering spatial coincidence only, and it is not indicative of an identification.
- Please acknowledge the LAT team if you use information from this report.

For questions and comments please contact:

- F. D'Ammando (dammando[at]ifc.inaf.it) for generic information related to this week

- Contact persons on this page for individual sources cited above.

Fermi LAT weekly report N. 125

2010-11-16T22:31:00.000-08:00

Covered period: 2010.Oct.25 - 2010.Oct.31

LAT Mission week: 125.57 - 126.57

The flat-spectrum radio quasar 3C 454.3 is still the brightest extragalactic source on the sky. The largest daily flux this week was (7.6 ± 0.8)e-6 on Oct 28.

The flat-spectrum radio quasar 4C +21.35 was bright from Oct 25-29, reaching (1.9 ± 0.4)e-6 on Oct 26.

The flat-spectrum radio quasar PKS 2326-502 was detected throughout the week, reaching (1.3 ± 0.3)e-6 on Oct 27.

The flat-spectrum radio quasar PMN J2345-1555 was detected throughout the week, reaching (0.7 ± 0.2)e-6 on Oct 29. This is part of ongoing activity reported in several ATels (#2972, #2977, #2986, #2989, #3004).

The flat-spectrum radio quasar B2 1846+32A reached (1.1 ± 0.3)e-6 on Oct 29.

The BL Lac PKS 0537-441 was detected on Oct 26 at (0.9 ± 0.3)e-6 and again on Oct 31 with a similar flux.

The classic BL Lac Mkn 421 was detected on Oct 26 and 31 at (0.2 ± 0.1)e-6.

The following sources were detected sporadically (in one of the seven one-day time bins): PKS 2155-304, B3 1708+433, PKS 1730-13. PKS 1730-13 turned out to be the beginning of a flare that was sustained into the following week, as reported in ATel #3002.

Fluxes are in the unit of photons/cm²/s above 100 MeV. All errors are statistical only.

Note. All the fluxes reported above are from the ASP analysis and should be considered preliminary and should not be used for publication, however they are indicative of the flux range and the current status of a source. Source association is done on the basis of source location, considering spatial coincidence only, and it is not indicative of an identification.
- Please acknowledge the LAT team if you use information from this report.

For questions and comments please contact:

- J. Vandenbroucke (justinv[at]stanford.edu) for generic information related to this week.

- Contact persons on this page for individual sources cited above.

Fermi LAT weekly report N. 126

2010-11-11T10:50:00.000-08:00

Covered period: 2010.Nov.1 - 2010.Nov.7

LAT Mission week: 126.57 - 127.57

PKS 1730-13 detected in flare on Nov. 1-2, reaching a daily flux of (1.7+/-0.3)E-6 (see ATel#3002) and continued to be active for most of the week.

3C 454.3 very bright for all the week with daily flux between 8.0E-6 (Nov. 1) and 14.0E-6 (Nov. 5).

PKS 1830-211 detected for all the week with daily flux between 0.8E-6 and 2.5E-6.

PKS 2326-502 detected in high activity state during the entire week, with daily flux between 0.7E-6 and 1.5E-6.

CGRaBS J2345-1555 (also known as PMN J2345-1555) detected on three consecutive days this week (Nov. 1-3), with daily flux between 0.6E-6 and 0.8E-6.

B3 1708+433 detected in high activity state on Nov. 3, with daily flux of about 0.9E-6.

4C +21.35 detected on Nov. 2, 4, and 5, with daily flux between 0.3E-6 and 1.3E-6.

Sporadic daily detections of blazars: PKS 0537-441, B2 1215+30, B3 2308+34, B2 0619B+33, B2 1520+31, PKS 0336-01, PKS 2155-304, 3C 66A, BL Lacertae, 3C 279.

Fluxes are in the unit of photons/cm²/s above 100 MeV. All errors are statistical only.

Note. All the fluxes reported above are from the ASP analysis and should be considered preliminary and should not be used for publication, however they are indicative of the flux range and the current status of a source. Source association is done on the basis of source location, considering spatial coincidence only, and it is not indicative of an identification.
- Please acknowledge the LAT team if you use information from this report.

For questions and comments please contact:

- F. D'Ammando (filippo.dammando[at]ifc.inaf.it) for generic information related to this week

- Contact persons on this page for individual sources cited above.

Fermi LAT weekly report N.123

2010-11-02T08:50:00.000-07:00

Covered period: 2010 Oct. 11 - 17

LAT Mission week: 123.57 - 124.57

Outburst of high-redshift and gravitationally lensed FSRQ PKS 1830-211 (z=2.507), with important gravitational magnification and Galactic absorption features. The source on October 14, 2010 showed a bright gamma-ray outburst with a daily flux of (5.2+/-1.1)E-6 more than a factor of 12 greater than reported in the Fermi-LAT 1st year catalog (ATel#2943). The flux was higher on Oct. 15 (7.8+/-0.9)E-6, about 18 times the 1-year catalog average flux).

PKS 2155-304 reached the threshold of daily flux (1.0+/-0.3)E-6, with photon index 2.6+/-0.3 (ATel#2944).

This index value can be due to statistical dispersion and flux-index correlation at low test statistics
values, close to the sensitivity curve, rather than to a real softer-when-brighter behavior of this high-energy peaked
blazar.

CRATES J0531-4827 bright during the week.

3C 454.3 bright above daily flux 2E-6.

The flare of 4C 21.35 is continuing also this week (daily flux above 2E-6).

PKS 1329-049 flare at about 1.7E-6 id a day of the week.

Other sporadic detected blazars: PKS 2326-502, PKS 0208-512, B2 1520+31, PKS
0426-380, S4 1030+61, PKS 2142-75, B2 0619+33, Mkn 421, 4C 38.41 (B2 1633+38), B2 1846+32A, GB6 J1722+6105, PKS 0537-441, PKS 0244-470

Fluxes are in the unit of photons/cm^2/s above 100 MeV.

Note. All the fluxes reported above are by the ASP analysis and should be considered preliminary and should not be used for publication; however they are indicative of the flux range and the current status of a source. Source association is done on the basis of source location, considering spatial coincidence only, and it is not indicative of an identification.

- Please acknowledge the LAT team if you use information from this report.

For questions and comments please contact:

- S. Ciprini (stefano.ciprini[at]pg.infn.it) for generic information related to this week

- Contact persons on this page for individual sources cited above.

Fermi LAT weekly report N.122

2010-11-02T08:49:00.000-07:00

Covered period: 2010 Oct. 4 - 10

LAT Mission week: 122.57 - 123.57

CRATES J0531-4827 and PKS0537-441 bright during the week.

3C 454.3 bright above daily flux 2E-6.

A new flare of 4C 21.35.

PKS 2326-502 in high state at the beginning of the week

Sun eclipse of 3C 279 on Oct.8

Other sporadic detected blazars: PKS 1313-333, PKS 1329-049, B2 1520+31, PKS
0426-380, PKS 1157-215, S4 1030+61, PKS 0727-11, B2 0619+33.

Fluxes are in the unit of photons/cm^2/s above 100 MeV.

Fermi LAT weekly report N.123

2010-10-28T09:28:00.000-07:00

Covered period: 2010.Oct.18 - 2010.Oct.24

LAT Mission week: 123.57 - 124.57

NGC 1275 was detected on Oct. 20 and 24 (daily flux below 0.7 X 10^-6).

PKS 0426-380 was detected on Oct. 18, 21, and 23 (daily flux below 0.7 X 10^-6).

PKS 0524-485 was detected on Oct. 18, 20, and 21 (daily flux between 0.3 and 0.9 X 10^-6).

B2 0619+33 continued to be detected through the entire week (flux between 0.8 and 1.4 X 10^-6).

Mkn 421 was detected on Oct. 18, 23, and 24 (daily flux at 0.3 X 10^-6).

4C 21.35 was relatively bright during all week, with daily flux below 1.6 X 10^-6.

PKS 1830-21 continued to be detected with a peak flux of 4.6 X 10^-6 on Oct. 18.

The FSRQ PKS 1846+32A (CGRaBS J1848+3219) appeared on Oct. 17 with a flux of 0.7 X 10^-6, when a simultaneous near-infrared flare was observed (ATel#2953). The source increased the gamma-ray flux up to 2.2 X 10^-6 on Oct. 18 (see ATel#2954). In the following days the flux level stabilized between 0.7 and 1.2 X 10^-6.

The FSRQ PMN J1913-3630 appeared on Oct 21 and 22. In the first day the daily flux was 1.3 X 10^-6 and an ATel was posted (ATel#2966). The source was not detected previously neither by LAT or by EGRET.

PKS 2155-304 continued to be detected through the week (flux between 0.5 and 0.9 X 10^-6).

3C 454.3 was very bright during all week, with daily flux above 3.9 and up to 5.1 X 10^-6.

PKS 2326-502 was detected on Oct. 20, 22, and 24 (flux between 0.7 and 1.0 X 10^-6).

The FSRQ CGRaBS J2345-1555 appeared in the last day of the week with a flux of 0.6 X 10^-6. The source showed an increased activity in the optical and a joint ATel with the ATOM team was posted (ATel#2972).

Sporadic activity observed from PKS 0537-441 (Oct. 19 and 21), CGRaBS J1033+6051 (Oct. 19 and 20), B2 1348+30B (Oct. 23), and B3 1708+433 (Oct. 18). All fluxes below 1.0 X 10^-6.

Fluxes are in the unit of photons/cm²/s above 100 MeV. All errors are statistical only.

Note. All the fluxes reported above are from the ASP analysis and should be considered preliminary and should not be used for publication, however they are indicative of the flux range and the current status of a source. Source association is done on the basis of source location, considering spatial coincidence only, and it is not indicative of an identification.
- Please acknowledge the LAT team if you use information from this report.

For questions and comments please contact:

- D. Donato (donato[at]milkyway.gsfc.nasa.gov) for generic information related to this week

- Contact persons on this page for individual sources cited above.

Fermi LAT weekyl report N.120

2010-10-06T15:17:00.000-07:00

Covered period: 2010.September.27 - 2010.October.3

LAT Mission week: 121.57 - 122.57

Following the increased gamma-ray activity report by the AGILE and LAT collaborations from the Crab Nebula ( ATel #2855, ATel #2861), the daily flux appears to be returning to typical levels. The Crab was seen throughout the week ranging in daily flux from (4.2+/-0.7)E-6 on the 28th to (2.3+0.5)E-6 on the 1st.

The FSRQ 3C279 was detected in a flaring state on the 27th with a daily flux of (3.9+/-1.4) E-6, Atel #2886. The flux decreased steadily over the next 3 days to a daily value of (0.7+/-0.3) on the 30th and was not seen in the second half of the week.

CRATES J0531-4827 (also known as PMN J0531-4827) was detected in a high state throughout the week. The daily flux ranged from (0.8+/-0.3)E-6 on the 27th to (1.6+/-0.3)E-6 on the 2nd. The LAT collaboration reported the detection of GeV gamma-ray emission from this blazar in Atel #2907. It is very close spacially to PKS 0524-485.

3C454.3 was detected most days this week with an average daily flux of 2.6E-6.

PKS 1329-049 exhibited a high daily flux of (1.4+/-0.1)E-6 on the 28th and in total was detected on 4 days this week (28th, 29th, 1st, 3rd).

B2 0619+33 was detected on the 27th, 1st and 2nd.

Sporadic activity from B2 1510+31, PKS 0537-441, PKS 0426-380, PKS 0727-11, PKS 2326-502 , CRATES J1640+3946 and 4C+21.35.

Fluxes are in the unit of photons/cm²/s above 100 MeV. All errors are statistical only.

Note. All the fluxes reported above are from the ASP analysis and should be considered preliminary and not be used for publication, however they are indicative of the flux range and the current status of a source. Source association is done on the basis of source location, considering spatial coincidence only, and it is not indicative of an identification.
- Please acknowledge the LAT team if you use information from this report.

For questions and comments please contact:

- A. Cannon (annacannon1984@gmail.com) for generic information related to this week

- Contact persons on this page for individual sources cited above.

Fermi LAT weekly report N. 119

2010-09-30T14:01:00.000-07:00

Covered period: 2010.September.20 - 2010.September.26

LAT Mission week: 120.57 - 121.57

After the gamma-ray flux increase from the direction of the Crab Nebula reported by the AGILE and LAT Collaborations ( ATel #2855, ATel #2861) a dedicated pointed observation of the Crab Nebula from 2010-09-23 15:50 UT to 2010-09-27 19:49 UT was performed by Fermi.

The Fermi LAT monitoring of this source showed a flux enhancement during the interval 18-22 September. Measurements taken starting on 23 September are consistent with the typical flux of the Crab. The average total flux from this location (which includes the nebula and pulsed emission) above 100 MeV measured between 2010-09-23 00:00:00 and 2010-09-26 18:43:01 UTC was (280 +/- 20) x 10^-8 ph/cm2/sec. The systematic error on the flux is generally estimated to be ~10% at 100 MeV.
A preliminary phase-resolved analysis of the flaring source shows that the excess flux due to the flare is the same in the on and off pulse selections for the pulsar and thus it does not appear that the enhanced emission is pulsed. This suggests that origin of the flare is related to the nebula rather than the pulsar emission ( ATel #2879).

PKS 0727-11 detected in flare on Sept. 21, with daily flux of (1.4+/-0.4)E-6 (see ATel #2860) and continued to be active during the entire week, at daily flux between 0.5E-6 (Sept. 24) and 0.8E-6 (Sept. 25).

NGC 1275 (Perseus A) detected on Sept. 23 and 26, with daily flux of (0.5+/-0.2)E-6 and (0.3+/-0.1)E-6.

PKS 1329-49 detected in flaring state on four consecutive days this week (Sept. 20-23), with daily flux between 2.5E-6 and 4.5E-6.

B2 1846+32A detected on Sept. 20 and 22, at daily flux of about 0.6E-6 and 0.8E-6, respectively.

3C 279 detected on three consecutive days this week (Sept. 20-22), with daily flux between 0.6E-6 and 1.0E-6.

PKS 1313+333 detected on two consecutive days this week (Sept. 22 and 23), with daily flux between 0.6E-6 and 0.9E-6.

B2 1520+31 detected in high activity state on Sept. 22, with daily flux of about 1.1E-6.

PKS 2326-502 detected in high activity state on Sept. 20, with daily flux of about 1.2E-6.

B2 0619+33 detected on Sept. 24 and 26, at daily flux of about 0.5E-6 and 0.9E-6, respectively.

3C 454.3 bright for all the week with daily flux between 3.0E-6 (Sept. 26) and 6.5E-6 (Sept. 22).

Sporadic daily detections of blazars B2 0200+30 (Sept. 20), S5 0716+714(Sept. 21), Mrk 421 (Sept. 21), 4C +21.35 (Sept. 22), PKS 0736+01 (Sept. 24) and PKS 0524-485 (Sept. 25).

Fluxes are in the unit of photons/cm²/s above 100 MeV. All errors are statistical only.

Note. All the fluxes reported above are from the ASP analysis and should be considered preliminary and should not be used for publication, however they are indicative of the flux range and the current status of a source. Source association is done on the basis of source location, considering spatial coincidence only, and it is not indicative of an identification.
- Please acknowledge the LAT team if you use information from this report.

For questions and comments please contact:

- F. D'Ammando (dammando[at]ifc.inaf.it) for generic information related to this week

- Contact persons on this page for individual sources cited above.

Fermi LAT weekly report N. 118

2010-09-16T06:13:00.000-07:00

Covered period: 2010.Sep.06 - 2010.Sept.12 (UT)

LAT Mission week: 118.57 - 119.57

PKS 1329-049 (ATel #2837) on September 6, 2010, was in a high state with a gamma-ray flux (E>100MeV) of (3.0 +/-0.5) x10^-6 photons cm^-2 s^-1, making it the brightest source in the extragalactic gamma-ray sky on that day. On September 7, the source was still bright with a flux of (2.3 +/-0.7) x10^-6 photons cm^-2 s^-1, it was also detected with lower flux on September 8 and 11. Previously, the source was detected by Fermi on the 1-day timescale on September 22, 2009, and July 7, 2010, at a flux level of about 1.0 x10^-6 photons cm^-2 s^-1 (ATel #2728). The Fermi LAT contact person for this source is D. Donato (donato[at]milkyway.gsfc.nasa.gov).

S5 0716+714> was detected on September 10 with a flux of (0.6 +/-0.2) x10^-6 photons cm^-2 s^-1.

4C +21.35 was detected on September 6, 8 and 11 flux of about 1.0 x10^-6 ph cm^-2 s^-1.

3C 454.3 was detected throughout the week at a flux of about 2.0 x10^-6 ph cm^-2 s^-1.

Active sources appearing for short periods of time during this week were:
PKS 0332-403 (Sep. 10), S4 1030+61 (Sep. 7, 8), TON 599 (4C +29.45, Sep. 6), B2 1520+31 (Sep. 6, 11), PKS 2155-304 (Sep. 7, 9, 10), PKS 2326-502 (Sep. 7, 11, 12).

Fluxes are in the unit of photons/cm²/s above 100 MeV. All errors are statistical only.

Note. All the fluxes reported above are from the ASP analysis and should be considered preliminary and should not be used for publication, however they are indicative of the flux range and the current status of a source. Source association is done on the basis of source location, considering spatial coincidence only, and it is not indicative of an identification.
- Please acknowledge the LAT team if you use information from this report.

For questions and comments please contact:

- K. Sokolovsky (ksokolov[at]mpifr-bonn.mpg.de) for generic information related to this week

- Contact persons on this page for individual sources cited above.

Fermi LAT weekly report N.117

2010-09-16T03:00:00.000-07:00

2010.Aug.30 - 2010.Sept.5 (UT)

117.57 - 118.57

B2 0619+33 first detected on September 1st, showed a GeV flare on
September 3, reaching a peak flux level on daily scale of 1.0
+/-0.2*10^-6 ph cm^-2 s^-1 (ATel #2829).

4C +21.35 was detected throughout the week at flux levels between 0.5
and around 2.0*10^-6 ph cm^-2 s^-1.

3C 454.3 was detected throughout the week at a flux of above
2.0*10^-6 ph cm^-2 s^-1.

Active sources appearing for short periods of time during this week
were: PKS 0537-441 (Aug. 30), PKS 2326-502 (Aug. 30,31,Sept. 2, and 5), B2 1520+31 (Sept. 3 and 5).

Fluxes are in the unit of photons/cm²/s above 100 MeV. All errors are statistical only.

Note. All the fluxes reported above are from the ASP analysis and should be considered preliminary and should not be used for publication, however they are indicative of the flux range and the current status of a source. Source association is done on the basis of source location, considering spatial coincidence only, and it is not indicative of an identification.
- Please acknowledge the LAT team if you use information from this report.

For questions and comments please contact:

- F. Schinzel (schinzel[at]mpifr-bonn.mpg.de) for generic information related to this week

- Contact persons on this page for individual sources cited above.

Fermi LAT weekly report N.116

2010-09-09T09:01:00.001-07:00

Covered period: 2010.Aug.23 - 2010.Aug.29

LAT Mission week: 116.57 - 117.57

PKS 0537-441 is detected through the week with stable daily flux (0.5 X 10^-6).

TON 599 continues to be detected through the week (flux between 0.9 and 1.5 X 10^-6).

4C 21.35 detected only on Aug. 29 with flux 1.5 X 10^-6.

3C 454.3 is still bright during all week, with daily flux below 4.2 X 10^-6.

PKS 2326-502 is detected through the entire week (flux between 0.6 and 1.8 X 10^-6).

The radio source B2 0619+33/VCS J0622+3326 is detected on Aug. 24, 25, 27 and 28 with flux between 0.6 and 1.2 X 10^-6 (peak observed on Aug. 27).

Sporadic activity observed from B2 2234+28A (Aug. 23), PKS 0727-11, PKS 1510-08, 4C +47.44 (Aug. 24), PKS 0458-02 (Aug. 25), and 3C 273 (Aug. 26). All fluxes below 1.0 X 10^-6.

Fluxes are in the unit of photons/cm²/s above 100 MeV. All errors are statistical only.

Note. All the fluxes reported above are from the ASP analysis and should be considered preliminary and should not be used for publication, however they are indicative of the flux range and the current status of a source. Source association is done on the basis of source location, considering spatial coincidence only, and it is not indicative of an identification.
- Please acknowledge the LAT team if you use information from this report.

For questions and comments please contact:

- D. Donato (donato[at]milkyway.gsfc.nasa.gov) for generic information related to this week

- Contact persons on this page for individual sources cited above.

Fermi LAT weekly report N.115

2010-09-09T09:00:00.001-07:00

Covered period: 2010.Aug.16 - 2010.Aug.22

LAT Mission week: 115.57 - 116.57

PKS 0537-441 is detected between Aug. 20 and 22 (daily flux 0.5 X 10^-6).

TON 599 continues to be detected through the entire week (flux between 0.5 and 1.3 X 10^-6).

4C 21.35 and 3C 454.3 were relatively bright during all week, with daily flux below 1.2 and 2.4 X 10^-6, respectively.

PKS 2326-502 is detected through the entire week (flux between 0.7 and 1.4 X 10^-6).

The radio source B2 0619+33/VCS J0622+3326 is detected on Aug. 16 and 17 with flux at (0.8 +/- 0.3) and (0.6 +/- 0.2) X 10^-6.

Sporadic activity observed from CGRaBS J0850-1213 (Aug. 17), S5 0716+71, PKS 0805-07 (Aug. 18), PKS 0332-403 (Aug. 19), 3C 66A (Aug. 21), and B2 2234+28A (Aug. 22). All fluxes below 1.0 X 10^-6.

Fluxes are in the unit of photons/cm²/s above 100 MeV. All errors are statistical only.

Note. All the fluxes reported above are from the ASP analysis and should be considered preliminary and should not be used for publication, however they are indicative of the flux range and the current status of a source. Source association is done on the basis of source location, considering spatial coincidence only, and it is not indicative of an identification.
- Please acknowledge the LAT team if you use information from this report.

For questions and comments please contact:

- D. Donato (donato[at]milkyway.gsfc.nasa.gov) for generic information related to this week

- Contact persons on this page for individual sources cited above.

Fermi LAT weekly report N.114

2010-08-24T07:05:00.000-07:00

Covered period: 2010 Aug. 09 - 15

LAT Mission week: 114.57 - 115.57

Ton 599 (4C 29.45, S3 1156+29, OM 295, 3EG J1200+2847, z=0.72449) showed on August 15, for the first time since the launch of Fermi, a flare above the threshold with daily flux (1.2 +/- 0.3)E-6, a factor ofabout ten above the 1-year average flux. The flare community was alerted n ATel#2795.

PKS 2326-502 was still bright at the beginning of the week (flux about 0.8E-6).

NGC 1275 and S5 0716+71 were rather active being detected in some days of the week.

3C 454.3, PKS 0537-441 and 4C 21.35 were bright during the week.

PMN J0850-1213 and PKS 1510-08 were seen only in one day.

Fluxes are in the unit of photons/cm^2/s above 100 MeV.

Fermi LAT weekly report N. 112

2010-08-11T01:00:00.000-07:00

Covered period: 2010.August.2 - 2010.August.8

LAT Mission week: 113.57 - 114.57

PKS 2326-502 detected in flare on August 7, with daily flux of (1.1+/-0.3)E-6 (see ATel #2783).

B2 2308+34 detected in flaring activity for two consecutive days (Aug. 7 and 8) with daily flux of (0.9 +/- 0.2)E-6 (see ATel #2783).

NGC 1275 (Perseus A) detected on three consecutive days this week (Aug. 5, 6 and 7), with daily flux between 0.5E-6 and 0.7E-6.

S5 0716+714 detected with daily flux at about 0.4E-6 on Aug. 6 and 7. The source was also detected bright on August 8 on timescales of 6 hours at a flux of (1.3 +/- 0.6)E-6.

The high redshift blazar (z = 1.762) CRATES J1239+0443 detected on Aug. 3, with daily flux of (0.6+/-0.2)E-6.

1FGL J2015.7+3708, a source in the Cygnus Region, detected on Aug. 4 with daily flux of (2.4+/-0.5)E-6. The most likely counterpart is the blazar B2013+370.

PKS 0537-441 detected on three consecutive days this week (Aug. 6-8), with daily flux between 0.3E-6 and 0.6E-6.

4C 21.35 detected on Aug. 5, 6 and 8 at daily flux between 1.3E-6 and 1.7E-6.

PKS 1510-089 detected on four days this week with daily flux above 1.0E-6.

3C 454.3 bright for all the week with daily flux between 1.4E-6 (Aug. 5) and 3.4E-6 (Aug. 8).

Sporadic daily detections of blazars 4C 28.07 (Aug 7) and PKS 0447-439 (Aug 7).

Fluxes are in the unit of photons/cm^2/s above 100 MeV.

For questions and comments please contact:

- F. D'Ammando (dammando[at]ifc.inaf.it) for generic information related to this week

- Contact persons listed on this page for individual sources.

Fermi LAT weekly report N. 111

2010-08-08T17:22:00.000-07:00

Covered period: 2010.07.26-2010.08.01

(Mission week: 112.57-113.57)

NGC 1275 (Per A) was detected four days this week (26-29), but with a lower flux than last week, averaging (0.2 ± 0.1)x10^-6 over the full week.

PKS 1510-08 was relatively bright, detected the 26th-30th, with an average flux for the week of (0.9 ± 0.1)x10^-6

3C 454.3 remains fairly bright, but faded a bit compared to the previous week: average flux (1.3 ± 0.1)x10^-6 for the week

4C +21.35 was detected on the 26th, 28th, and 29th, with an average flux of (1.0 ± 0.1)x10^-6 for the week

S5 0716+71 was detected the 26th and 27th, flux below 0.4x10^-6

All fluxes are quoted in photons/cm²/s, above 100 MeV. Uncertanties are statistical only.

Note that the fluxes reported above should be considered preliminary and should not be used for publication; however, they are indicative of the flux range and the current status of the source. Source association is based on source location, considering only spatial coincidence, and does not indicate a firm identification.

Please acknowledge the LAT team if you use information from this report.

For questions and comments please contact:

- Eric Wallace (wallacee@uw.edu) for generic information related to this week.

- Contact people listed on this page for individual sources.

Extra Note - July 30, 2010

2010-07-30T12:21:00.000-07:00

Non-detection of AGL J2241+4454

In ATel #2761, the AGILE team reported the detection of a possible new gamma-ray point source (AGL J2241+4454) at R.A.,Dec. = 340.3, 44.9 (J2000). Preliminary analysis of LAT data for the same direction and time period shows no significant detection above 100 MeV. Assuming a power law spectrum with photon index 2, we place an upper limit on the integral flux above 100 MeV of 1.0 x 10^-7 ph cm^-2 s^-1, at 95% confidence. For a softer source (index=3), the limit shifts up to 3.0 x 10^-7.

For questions and comments, please contact the flare advocate on shift (wallacee[at]uw.edu).

Fermi LAT weekly report N. 110

2010-07-29T12:19:00.000-07:00

Covered period: 2010.Jul.19 - 2010.Jul.25

LAT Mission week: 111.57 - 112.57

NGC 1275 (Perseua A) was detected on 3 days this week- 20th, 21st and 24th. The flux seen on the 24th is similiar to that menioned in the ATel #2737.

3C454.3 was bright again, being detected most days this week with an average daily flux of 2.2x10^-6.

PKS 1510-08 was also relatively bright, detected thoughout the week at an average daily flux of 1.1x10^-6.

Both 4C14.23 and 4C21.35 ere detected in the first half of the week with average daily fluxes of 0.5x10^-6 and 1.4x10^-6, respectively.

The BL Lac 3C66A was detected on the 20th and 23rd (flux below 0.6x10^-6.

PKS 0537-441 was detected on the 21st at a flux of 0.2x10^-6 and S5 0716+71 on the 23rd at a flux of 0.2x10^-6.

Fluxes are in the unit of photons/cm²/s above 100 MeV. All errors are statistical only.

Note. All the fluxes reported above are from the ASP analysis and should be considered preliminary and should not be used for publication, however they are indicative of the flux range and the current status of a source. Source association is done on the basis of source location, considering spatial coincidence only, and it is not indicative of an identification.
- Please acknowledge the LAT team if you use information from this report.

For questions and comments please contact:

- A. Cannon (annacannon1984@gmail.com) for generic information related to this week

- Contact persons on this page for individual sources cited above.

Fermi LAT weekly report N. 109

2010-07-21T07:08:00.000-07:00

Covered period: 2010.Jul.12 - 2010.Jul.18

LAT Mission week: 110.57 - 111.57

BL Lac 3C 66A is detected on Jul. 15, 16, and 18 (flux below 0.5 X 10^-6).

NGC 1275 (Perseus A) is detected most of the week (flux below 0.7 X 10^-6). The first day of activity, corresponding to the highest flux level, was July 13 and an ATel was posted (ATel#2737).

PKS 0537-441 is detected most days this week, with daily flux below 0.9 X 10^-6.

S5 0716+71 is detected on Jul. 14 and 16 (flux below 0.4 X 10^-6).

4C+14.23 is detected on Jul. 15 and 16 (flux below 0.6 X 10^-6).

4C 21.35 and 3C 454.3 were relatively bright during all week, with daily flux below 2.7 X 10^-6 and 3.3 X 10^-6, respectively. 4C 21.35 showed some sign of fading in the last part of the week, with flux dropping below 1.0 X 10^-6.

PKS 1424-41 is detected on Jul. 12 and 15 (flux below 0.6 X 10^-6).

B2 1520+31 is detected on Jul. 13, 15, and 17 (flux below 1.0 X 10^-6).

PKS 0426-380 (12), PKS 0524-485 (13), CGRaBS J1312+4828 (13), PKS 1510-08 (13), B2 0716+33 (16) and PKS 0521-36 (17) are detected (flux below 1 X 10^-6 ). In parenthesis the day of detection is indicated.

Fluxes are in the unit of photons/cm²/s above 100 MeV. All errors are statistical only.

Note. All the fluxes reported above are from the ASP analysis and should be considered preliminary and should not be used for publication, however they are indicative of the flux range and the current status of a source. Source association is done on the basis of source location, considering spatial coincidence only, and it is not indicative of an identification.
- Please acknowledge the LAT team if you use information from this report.

For questions and comments please contact:

- D. Donato (donato[at]milkyway.gsfc.nasa.gov) for generic information related to this week

- Contact persons on this page for individual sources cited above.

Fermi LAT weekly report N. 108

2010-07-12T11:02:00.000-07:00

Covered period: 2010.Jul.5 - 2010.Jul.11

LAT Mission week: 109.57 - 110.57

BL Lac 3C 66A is detected on Jul. 6 and 11 (flux below 0.5 X 10^-6).

PKS 0426-380 is detected most days this week, with daily flux below 0.7 X 10^-6).

PKS 0537-441 is detected on Jul. 7 and 8 (flux below 0.6 X 10^-6).

Mkn 421 is detected on Jul. 9 and 11 (flux below 0.4 X 10^-6).

4C 21.35 and 3C 454.3 were relatively bright during all week, with daily flux below 2.4 X 10^-6.

PKS 1329-049, a blazar at z=2.15, is detected on Jul. 6 and 7. In the second day the flux reached the 1.0 +/- 0.3 X 10^-6 threshold and an ATel was posted (ATel#2728).

The radio-loud narrow line Sy 1 galaxy PMN J0948+0022 is detected on Jul. 9 with flux at 1.3 +/- 0.4 X 10^-6 and an ATel was posted (ATel#2733).

PKS 1424+240 and 4C+14.23 are detected on Jul. 4 and 11, respectively (flux below 1 X 10^-6 ).

Fluxes are in the unit of photons/cm²/s above 100 MeV. All errors are statistical only.

Note. All the fluxes reported above are from the ASP analysis and should be considered preliminary and should not be used for publication, however they are indicative of the flux range and the current status of a source. Source association is done on the basis of source location, considering spatial coincidence only, and it is not indicative of an identification.
- Please acknowledge the LAT team if you use information from this report.

For questions and comments please contact:

- D. Donato (donato[at]milkyway.gsfc.nasa.gov) for generic information related to this week

- Contact persons on this page for individual sources cited above.

Fermi LAT weekly report N. 107

2010-07-08T10:01:00.000-07:00

Covered period: 2010.June.28 - 2010.July.4
LAT Mission week: 108.57 - 109.57

The NLSy1 CGRaBS J0948+0022 (PMN J0948+0022) detected with daily flux of (0.5 +/- 0.3)E-6 on June 28th.

The blazar 4C 21.35 (also known as PKS 1222+21 and PKS B1222+216) very bright during all the week, with daily flux between 2.5E-6 and 6.5E-6 (on June 30th).

PKS 0521-364 detected on three consecutive days this week (June 29th - July 1st), with a peak daily flux of (1.4 +/- 0.2)E-6 on June 30th.

PKS 0426-380 detected most days this week, with daily flux between 0.5E-6 and 1.0E-6.

PKS 0537-441 detected on four days this week, with daily flux between
0.4E-6 and 0.6E-6.

0716+71 detected on four days this week, with daily flux at about 0.5E-6.

3C 454.3 bright for most of the week with daily flux above 1.5E-6.

4C 29.45 detected on June 28th and 30th, with daily flux of about 0.4E-6.

Sporadic daily detections of blazars 3C 66A (June 28th), B3 0917+449 (June 28th), PKS 2155-304 (July 3rd), and 4C 47.44 (July 3rd).

Fluxes are in the unit of photons/cm²/s above 100 MeV. All errors are statistical only.

Note. All the fluxes reported above are from the ASP analysis and should be considered preliminary and should not be used for publication, however they are indicative of the flux range and the current status of a source. Source association is done on the basis of source location, considering spatial coincidence only, and it is not indicative of an identification.
- Please acknowledge the LAT team if you use information from this report.

For questions and comments please contact:
- F. D'Ammando (dammando[at]ifc.inaf.it) for generic information related to this week
- Contact persons on this page for individual sources cited above.

Fermi LAT weekly report N. 106

2010-07-04T00:12:00.000-07:00

Covered period: 2010.Jun.14 - 2010.Jun.20

LAT Mission week: 106.57 - 107.57

PKS 0521-36 was detected for the first time in a daily time scale with
a flux above the threshold of (1.0 ± 0.2) X 10^-6 in June 17, an Atel was
issued about the flaring activity of this source (see ATel #2683).
A Swift ToO was obtained (see ATel #2689).

4C +21.35 (June 18, see ATel #2687): Fermi/LAT has observed an increasing
gamma-ray flux from a source positionally consistent with 4C +21.35 (also known as PKS 1222+21 and PKS B1222+216) at z=0.43. On June 18,
2010 this blazar showed a bright flare with a daily flux (E>100MeV) of (12.46 ± 0.79) X 10^-6. A peak flux (E>100MeV)
of (16.42 ± 1.89) X 10^-6 was reached between 12:00 and 17:01 UT.

The same flare has been detected also by the AGILE (see ATel #2686) and MAGIC (see ATel #2684) telescopes, a SWIFT follow up has been obtained (see ATel #2698).

3C 454.3 was detected all the week.

CGRaBS J1033+6051 was detected above the threshold in the daily time scale on June 15.

Fluxes are in the unit of photons/cm²/s above 100 MeV. All errors are statistical only.

Note. All the fluxes reported above are from the ASP analysis and should be considered preliminary and should not be used for publication, however they are indicative of the flux range and the current status of a source. Source association is done on the basis of source location, considering spatial coincidence only, and it is not indicative of an identification.
- Please acknowledge the LAT team if you use information from this report.

For questions and comments please contact:

- G. Iafrate (iafrate[at]oats.inaf.it) F. Longo (longo[at]ts.infn.it) for generic information related to this week

- Contact persons on this page for individual sources cited above.

Extra Note - July 1, 2010

2010-07-01T08:57:00.000-07:00

About source reported in ATel #2703

Following the announcement of a NIR flaring activity of the
QSO CGRaBS J1700+6830 on June 12th,
observed with the CANICA NIR camera on the 2.1m telescope
at the Observatorio Astrofísico Guillermo Haro, located in Cananea,
Mexico, the LAT team announces that on same day (2010-06-12)
the source was in outburst reaching a flux (E>100MeV) of (0.9+/-0.2) x 10^-6 ph cm^-2 s^-1, more than 10 times the 1FGL catalog flux (Abdo, A. et al 2010, ApJ, 715, 429).
This source was detected for the first time from Fermi in the daily time scale
on 2009-03-22 (Atel #1986) in a high state with a gamma-ray flux (E>100MeV)
of (1.0+/-0.2) x 10^-6 ph cm^-2 s^-1.

For questions and comments please contact the Flare Advocate on shift (sara.cutini[at]asdc.asi.it)

Fermi LAT weekly report N. 105

2010-06-21T08:25:00.001-07:00

Covered period: 2010.Jun.06 - 2010.Jun.13

LAT Mission week: 105.57 - 106.57

3C 454.3 was detected all days of the week with a average flux of ~ 2E-6 reaching the higher level of (3.1+/-0.5)E-6 on June 9th.

PKS 0235-618 was detected for the first time in a daily time scale with a flux above the threshold of (1.1+/-0.3)E-6 in June 10th, an Atel was issued about the flaring activity of this source (Atel #2669).A Swift ToO was required (see Atel #2673).

4C 21.35 was detected all days of the week showing an increasing trend.

PKS 0426-380 was detected on June 13, 11 and 10, PKS 0537-441 was detected on June 13, 12, 11 and 9 and S5 0716+714 was detected only on June 7th.

Fluxes are in the unit of photons/cm2/s above 100 MeV. All errors are statistical only.

For questions and comments please contact:

- Sara Cutini (sara.cutini[at]asdc.asi.it) for generic information related to this week.

- Contact persons on this page for individual sources.

Fermi LAT weekly report N. 104

2010-06-10T07:52:00.000-07:00

Covered period: 2010.May.31 - 2010.Jun.06

LAT Mission week: 104.57 - 105.57

PKS 1915-458 (June 4; ATel #2666). Fermi/LAT has detected a new gamma-ray source positionally consistent with PKS 1915-458, a flat spectrum radio quasar at z=2.47 (Jackson et al. 2002, A&A, 386, 97). The redshift is unusually high for a flaring LAT blazar, however not unprecedented (ATEL #2217). On June 4, 2010 the gamma-ray flux (E>100MeV) of (0.36 +/-0.15) x10^-6 was observed corresponding to a detection significance of slightly greater than 5 sigma. Swift ToO observations have been requested to confirm identification of the flaring gamma-ray source with PKS 1915-458.

GB6 B1310+4844 (GB1 1310+487) is showing increasing gamma-ray flux during the last few weeks. The source was occasionally detected on daily timescale during this week with the moderate flux of ~0.4x10^-6.
Multiwavelength observations of the source are desirable to compare its current elevated gamma-ray state with the previous major gamma-ray flare in November 2009 (ATel #2306, #2310, #2311, #2316, #2320).

BL Lac was detected on June 4 and 5 with a flux of ~(0.8 +/-0.2)x10^-6.

4C +21.35 was detected during the first half of the week.

3C 454.3 was detected throughout the week.

Other sources detected on daily timescale during the week:
PKS 0426-380 (May 31, June 6), PKS 0537-441 (June 2, 5, 6), S5 0716+714 (May 31, June 5), S4 1030+61 (June 2, 4), PKS 1329-049 (June 1), PKS 1326-697 (June 2), PKS 1424-41 (June 1, 2, 6), PKS 1510-08 (June 3), 1FGL J1642.5+3947 (=3C 345?, June 2), PKS 2233-148 (June 3).

Fluxes are in the unit of photons/cm²/s above 100 MeV. All errors are statistical only.

Note. All the fluxes reported above are from the ASP analysis and should be considered preliminary and should not be used for publication, however they are indicative of the flux range and the current status of a source. Source association is done on the basis of source location, considering spatial coincidence only, and it is not indicative of an identification.
- Please acknowledge the LAT team if you use information from this report.

For questions and comments please contact:

- Kirill Sokolovsky (ksokolov[at]mpifr-bonn.mpg.de) and Frank Schinzel (schinzel[at]mpifr-bonn.mpg.de) for generic information related to this week.

- Contact persons on this page for individual sources.

Fermi LAT weekly report N. 103

2010-06-04T08:29:00.000-07:00

Covered period: 2010.May.24 - 2010.May.30

LAT Mission week: 103.57 - 104.57

Cygnus X-3 brightened this week during the current soft state. See ATEL #2646.
Blazar 4C +21.35 (PKS 1222+21) rebrightened and was detected each day this week, peaking at (7.3 ± 0.6) x 10^-6 on May 26.
BL Lacertae brightened on May 28 with a flux of (1.2 ± 0.3) x 10^-6
3C 454.3 remained steady and bright with daily flux above 2 x 10^-6
PKS 0537-441 was above threshold several days this week with daily flux between 0.7 x 10^-6 and 1.1 x 10^-6
PKS 0426–380, S5 0716+71, GB 1310+487, PKS 1424-41, and PKS 1510-08 were detected on several days this week below 1 x 10^-6
Blazars S4 1030+61, PKS 1329–049, and PKS 2155–304 were each detected during one day this week

Fluxes are in units of photons/cm²/s above 100 MeV. All errors are statistical only.

Note: all flux values reported above are from the ASP analysis and should be considered preliminary and should not be used for publication; however, they are indicative of the flux range and the current status of a source.
Source association is done using spatial coincidence only and is not indicative of an identification.

- Please acknowledge the LAT team if you use information from this report.

For questions and comments please contact:

- Liz Hays (elizabeth.a.hays[at]nasa.gov) for generic information related to this week.

- Contact persons on this page for individual sources cited above.

Fermi LAT weekly report N. 102

2010-05-26T08:45:00.000-07:00

Covered period: 2010.May.17 - 2010.May.23

LAT Mission week: 102.57 - 103.57

Blazar 1FGL J1033.8+6048 dimmed below 1E-6 with daily detection only untill 20th May.

Blazar 4C 21.35 (also known as PKS 1222+21) still bright, detected all week with a daily flux between (1.2+/-0.6)E-6 ph cm-2 s-1 and (2.3+/-0.4)E-6 ph cm-2 s-1, peaking on May 18th.

PKS 1424-41 detected most days this week, with increasing daily flux between 0.6 and 1E-6.

PKS 0537-441 detected most days this week, with daily flux between 0.6E-6 and 1.1E-6.

Blazar PKS 0426-380 detected on four days this week, with daily flux between 0.5 and 1.4E-6.

Blazar CGRaBS J1312+4828 detected on three consecutive days this week (May 18th - May 20th) with an average daily flux of about 0.35E-6 ph cm-2 s-1.

3C 454.3 very bright all the week with daily flux above 3.5E-6.

Sporadic daily detections of blazars 3C 273, PKS 2155-304, PKS 0332-403, 4C +55.17, PKS 1510-089 and CGRaBS J1700+6830.

Fluxes are in the unit of photons/cm^2/s above 100 MeV.

Note. All the flux reported above are by the ASP analysis and should be considered preliminary and should not be used for publication, however they are indicative of the flux range and the current status of a source. Source association is done on the basis of source location, considering spatial coincidence only, and it is not indicative of an identification. - Please acknowledge the LAT team if you use information from this report.

For questions and comments please contact:

- F. D'Ammando (dammando[at]ifc.inaf.it) for generic information related to this week

- Contact persons on this page for individual sources cited above.

Fermi LAT weekly report N. 101

2010-05-25T01:31:00.000-07:00

Covered period: 2010.May.10 - 2010.May.16

LAT Mission week: 101.57 - 102.57

Blazars PKS 1424-41, 4C 21.35 (also known as PKS 1222+21), 3C 454.3 very bright (daily flux above 2E-6 during most of the week).

For the first time from the launch of Fermi, the LAT source 1FGL J1033.8+6048 (associated to two FSRQ sources, S4 1030+61, a.k.a. TXS 1030+611, z=1.4009, and GB6 J1032+6051, z=1.064) flared above the 1E-6threshold. ATel#2622 published. Follow up by ground-based telescopes and Swift confirm the identification with S4 1030+61 (related following ATels). Weekly averaged flux is about 0.5E-6.

PKS 0537-441 dimmed during the week.

PKS 0301-243 reached the daily flux threshold of 1E-6 on May 11. Weekly averaged flux is about 0.3E-6.

BL Lac relatively bright (in particular reached a daily flux around 0.7E-6 on May 11, and weekly averaged flux about 0.26E-6), as well as Mkn 421 (weekly averaged flux about 0.1E-6).

Sporadic daily detections of blazars OP 313, 3C 273, PKS 0426-380, and PKS 2155-304.

Other blazars detected on weekly timescale, among others, are 3C 66A, NGC 1275, PMN J0850-1213, PKS 2227-08, B2 1520+31, PKS 0332-403.

Fluxes are in the unit of photons/cm^2/s above 100 MeV.

Note. All the flux reported above are by the ASP analysis and should be considered preliminary and should not be used for publication, however they are indicative of the flux range and the current status of a source. Source association is done on the basis of source location, considering spatial coincidence only, and it is not indicative of an identification. - Please acknowledge the LAT team if you use information from this report.

For questions and comments please contact:

- S. Ciprini (stefano.ciprini[at]pg.infn.it) for generic information related to this week

- Contact persons on this page for individual sources cited above.

Fermi LAT weekly report N. 100

2010-05-11T08:12:00.000-07:00

Covered period: 2010.May.3 - 2010.May.9

LAT Mission week: 100.57 - 101.57

4C+21.35 still active, detected all week with an average daily flux of 2.1x10^-6 ph cm-2 s-1, rising towards the end of the week peaking on the 8th May at a flux of (3.2+/-0.4)x10^-6 p cm-2 s-1.

3C454.3 was very bright, detected every day this week, peaking on the 7th May at a flux of (8.9+/-0.8)x10^-6 ph cm-2 s-1.

PKS 0537-441 continued its activity from last week with an average daily flux of 0.7x10^-6 ph cm-2 s-1. It was detected every day this week.

PKS 0301-243 continued its activity from last week and was detected up until 6th May with an average daily flux = 0.5x10^-6 ph cm-2 s-1.

PKS 0426-380 detected for four days this week, 6th-9th May, an average daily flux of ~0.5x10^-6 ph cm-2 s-1.

PKS 1424-41 detected for five days this week, 5th-9th May, with an average daily flux of ~1.3x10^-6 ph cm-2 s-1.

CRABS J1033+6051 was detected in the middle of the week, 4th-7th May, with an average daily flux of ~0.5x10^-6 ph cm-2 s-1.

Fluxes are in the unit of photons/cm²/s above 100 MeV. All errors are statistical only.

Note. All the fluxes reported above are from the ASP analysis and should be considered preliminary and should not be used for publication, however they are indicative of the flux range and the current status of a source. Source association is done on the basis of source location, considering spatial coincidence only, and it is not indicative of an identification.
- Please acknowledge the LAT team if you use information from this report.

For questions and comments please contact:

- A. B. Hill (adam.hill@obs.ujf-grenoble.fr) for generic information related to this week

- Contact persons on this page for individual sources cited above.

Fermi LAT weekly report N. 99

2010-05-05T04:59:00.000-07:00

Covered period: 2010.Apr.26 - 2010.May.2

LAT Mission week: 99.57 - 100.57

4C+21.35 still very bright, detected all week with an average daily flux of 4.3x10^-6 ph cm-2 s-1, peaking on the 30th April at a flux of (13.1+/-0.7)x10^-6 ph cm-2 s-1.

3C454.3 remained bright, detected every day this week, fluctuating in daily flux between (2.9+/-0.5)x10^-6 ph cm-2 s-1 and (5.7+/-0.6)x10^-6 ph cm-2 s-1.

PKS 0537-441 (27th April, daily flux = (1.2+/-0.2)x10^-6 ph cm-2 s-1) and PKS 0301-243 (28th April, daily flux = (1.4+/-0.3) x10^-6 ph cm-2 s-1) exhibited an increase in gamma- ray activity , (see ATel#2591). Both sources detected throughout week.

PKS 0426-380 detected on most days this week, at a relatively steady daily flux of ~0.6x10^-6 ph cm-2 s-1.

Mrk421 detected on four days this week with an average daily flux of ~0.3x10^-6 ph cm-2 s-1.

Sporacid activity from CGRaBS J0850-1213, CGRaBS J1033+6051, PKS 0727-11, PKS 1510-08, PKS 1424-41 and B2 0954+25A

Fluxes are in the unit of photons/cm²/s above 100 MeV. All errors are statistical only.

Note. All the fluxes reported above are from the ASP analysis and should be considered preliminary and should not be used for publication, however they are indicative of the flux range and the current status of a source. Source association is done on the basis of source location, considering spatial coincidence only, and it is not indicative of an identification.
- Please acknowledge the LAT team if you use information from this report.

For questions and comments please contact:

- A. Cannon (annacannon1984@gmail.com) for generic information related to this week

- Contact persons on this page for individual sources cited above.

Fermi LAT weekly report N. 98

2010-05-03T12:16:00.000-07:00

Covered period: 2010.Apr.19 - 2010.Apr.25

LAT Mission week: 98.57 - 99.57

PKS 0426-380 detected on 5 days this week with a daily flux above 0.5 +/- 0.2 X 10-6 (peak on Apr 22, with a daily flux (0.9 +/- 0.3) X 10-6).

PKS 0537-441 detected all week long with daily flux approaching and around (1 +/- 0.2) X 10-6.

S5 0716+714 detected on Apr. 19 and 22 with daily fluxes around (0.5 +/- 0.2) X 10-6.

CGRaBS J0850-1213 was detected on Apr. 19, 24, and 25 with daily fluxes not exceeding (0.8 +/- 0.2) X 10-6.

4C +21.35 has been detected all week long in a high state with daily fluxes above (1.5 +/- 0.2) X 10-6. A peak in intensity has been observed on Apr. 24, when the daily flux was (8.1 +/- 0.7) X 10-6 (see ATel#2584).

PKS 1424-41 has reached daily fluxes around (1.0 +/- 0.2) X 10-6 on Apr. 21 and 22 (see ATel#2583).

PKS 2233-148 was detected on Apr. 19 and 23 with daily fluxes around (0.7 +/- 0.3) X 10-6.

3C 454.3 still bright through the week but with daily flux fading from (9.5 +/- 0.8) X 10-6 to (3.4 +/- 0.5) X 10-6.

PKS 0906+01, HB89 1738+499, PKS 0301-243, PKS 0805-07, MRk 421, CGRaBS J1033+6051, and CGRaBS J1739+4955 were detected in one day of the week (flux below 1 X 10-6 ).

Fluxes are in the unit of photons/cm²/s above 100 MeV. All errors are statistical only.

Note. All the fluxes reported above are from the ASP analysis and should be considered preliminary and should not be used for publication, however they are indicative of the flux range and the current status of a source. Source association is done on the basis of source location, considering spatial coincidence only, and it is not indicative of an identification.
- Please acknowledge the LAT team if you use information from this report.

For questions and comments please contact:

- D. Donato (donato[at]milkyway.gsfc.nasa.gov) for generic information related to this week

- Contact persons on this page for individual sources cited above.

Fermi LAT weekly report N. 97

2010-04-20T00:44:00.000-07:00

Covered period: 2010.Apr.12 2010.Apr.18

LAT Mission week: 97.57 - 98.57

3C 454.3 detected in high state again this week, although seems fading. At the beginning of the week, on April 13, it reached a daily maximum flux of (13.4 +/- 0.9 ) e-6 while it has been detected with a flux of (7.3 +/- 0.7)e-6 in the last day.
PKS 0537-441 active during the first days of the week (daily flux above 1e-6), then fading but maintaining a daily flux less above 0.6 e-6.
PKS 1510-08 observed on April 14 with daily flux of (1.2 +/- 0.3) e-6.
4C 21.35 exhibited a high state (daily flux value about 1e-6 most of the week).
Sporadica appearance from 4C 14.23, PKS 0426-380, 4C 38.41, S5 0716+714, GB6 0850+4854 and PKS 0446+11 .

Fluxes are in the units of photons/cm2/s above 100 MeV. All errors are statistical only.

Note. All the fluxes reported above are from the ASP analysis and should be considered preliminary and should not be used for publication, however they are indicative of the flux range and the current status of a source. Source association is done on the basis of source location, considering spatial coincidence only, and it is not indicative of an identification. Please acknowledge the LAT team if you use information from this report.

For questions and comments please contact:

- Sara Buson (buson[at]pd.infn.it) and Stefano Ciprini (stefano.ciprini[at]pg.infn.it) for generic information related to this week.

- Contact persons on this page for individual sources cited above.

Fermi LAT weekly report N. 96

2010-04-19T18:26:00.000-07:00

Covered period: 2010.Apr.05 - 2010.Apr.11

LAT Mission week: 96.57 - 97.57

3C 454.3 flared reaching peak daily gamma-ray flux of
(15.8 +/-1.0)x10^-6 on April 8.

PKS B0906+015: a fast flare detected on April 8, reported in ATel #2543.

Other extragalactic sources seen on daily timescale during this week include:
GC 0109+224 (S2 0109+22, detected on Apr. 6, 7),
PKS 0426-380 (Apr. 5, 9, 11),
PKS 0537-441 (Apr. 5, 9, 10, 11),
PKS 1510-08 (Apr. 5, 9, 10, 11),
PKS 1622-253 (Apr. 5, 11),
4C +21.35 (Apr. 11),
PKS 2142-75 (Apr. 9, 11),
OX 169 (Apr. 10).

Fluxes are in the unit of photons/cm²/s above 100 MeV. All errors are statistical only.

Note. All the fluxes reported above are from the ASP analysis and should be considered preliminary and should not be used for publication, however they are indicative of the flux range and the current status of a source. Source association is done on the basis of source location, considering spatial coincidence only, and it is not indicative of an identification.
- Please acknowledge the LAT team if you use information from this report.

For questions and comments please contact:

-Kirill Sokolovsky (ksokolov[at]mpifr-bonn.mpg.de) and Frank Schinzel (schinzel[at]mpifr-bonn.mpg.de) for generic information related to this week.

- Contact persons on this page for individual sources cited above.

Extra note - Apr. 15, 2010

2010-04-15T08:18:00.000-07:00

About source reported in ATel#2552

Following the announcement by the AGILE team (ATel#2552) of the possible detection of a new unidentified gamma-ray source (AGL J0906-1241) the LAT data for the same sky position and time period are checked. Preliminary analysis points out no detection above 100 MeV by Fermi LAT as well as no visible photon-excess in the count map region around the specified position.

For questions and comments please contact the Flare Advocate on shif (buson[at]pd.infn.it and stefano.ciprini[at]pg.infn.it)

Fermi LAT weekly report N. 94

2010-03-31T02:39:00.000-07:00

Covered period: 2010.Mar.22 - 2010.Mar.28

LAT Mission week: 94.57 - 95.57

3C 454.3 still bright throughout the week, and increasing its flux value from 2.4 X 10^-6 ,at the beginning of the week, up to 7.2 X 10^-6 occurred the last day of the week.

PKS 0537-441 detected all the week with flux values oscillating around 10^-6

PKS 0426-380 detected for 5 days of the week with mean flux value of = 0.8 X 10^-6

4C 38.41, 3C 273 seen twice this week with mean flux values respectively of 2.5 X 10^-6 and 1.2 X 10^-6

Mkn 421 quasi-detected twice during the week (mean flux about 0.2 X 10^-6)

Sporadic activity from B2 0716+33, PKS 1510-08, 4C 21.35, PKS 0524-485, PKS 2233-148, PKS 0402-362.

Fluxes are in the unit of photons/cm^2/s above 100 MeV.

Note. All the flux reported above are by the ASP analysis and should be considered preliminary and should not be used for publication, however they are indicative of the flux range and the current status of a source. Source association is done on the basis of source location, considering spatial coincidence only, and it is not indicative of an identification. - Please acknowledge the LAT team if you use information from this report.

For questions and comments please contact:

- E. Antolini (elisa.antolini[at]tiscali.it) for generic information related to this week

- Contact persons on this page for individual sources cited above.

Fermi LAT weekly report N. 93

2010-03-30T07:51:00.000-07:00

Covered period: 2010.Mar.15 - 2010.Mar.21

LAT Mission week: 93.57 - 94.57

PKS 0537-441 was getting brighter at the end of the week. Its weekly average flux was (0.9 ±0.1)*10^-6. Previous gamma-ray activity was reported in ATels #2454, #2124, #1759.

PKS 1510-08 was observed at the end of the week peaking at (3.0 ±0.6)*10^-6 on the 20th of March.

4C +21.35 was detected above 0.7*10^-6 throughout the week.

PKS 0727-11 was observed in a high state with a weekly average flux of (0.9 ±0.1)*10^-6.

PKS 0402-362 was detected on the 15th of March with a flux of (2.0 ±0.4)*10^-6. Its weekly average flux was (0.7 ±0.1)*10^-6.

3C 273 remained bright throughout the week with an average flux of (2.2 ±0.2)*10^-6.

3C 454.3 remained bright throughout the week as well, with an average flux of (2.6 ±0.2)*10^-6 .

Fermi J2102+4542 probably associated with the symbiotic nova V407 Cyg (ATel #2487). Average weekly flux=(0.5 ±0.1)*10^-6. You can read more about the current exceptional outburst of V407 Cyg on Universe Today.

Fluxes are in the unit of photons/cm²/s above 100 MeV. All errors are statistical only.

Note. All the fluxes reported above are from the ASP analysis and should be considered preliminary and should not be used for publication, however they are indicative of the flux range and the current status of a source. Source association is done on the basis of source location, considering spatial coincidence only, and it is not indicative of an identification.
- Please acknowledge the LAT team if you use information from this report.

For questions and comments please contact:

- F. Schinzel (schinzel[at]mpifr-bonn.mpg.de) and K. Sokolovsky (ksokolov[at]mpifr-bonn.mpg.de) for generic information related to this week.

- Contact persons on this page for individual sources cited above.

Fermi LAT weekly report N. 92

2010-03-22T08:12:00.000-07:00

Covered period: 2010.Mar.08 - 2010.Mar.14

LAT Mission week: 92.57 - 93.57

3C 454.3 still bright throughout the week, with an initial daily flux greater than 4 X 10^-6 and fading to 2.5 X 10^-6.

3C 273 also bright, detected on 5 days this week with a daily flux greater than 2.4 X 10^-6.

The FSRQs PKS 0402-362 and PKS 0426-380 both bright, detected most days of the week, with a daily flux just above and below (respectively) the 1 X 10^-6 threshold.

PKS 0527-441 detected all this week long with an average daily flux of 0.5 X 10^-6.

0716+714 detected in the first three days of the week with a daily flux of 0.3 X 10^-6 in the first day and 0.8 X 10^-6 in the following ones.

Sporadic activity from PKS 0250-225 (0.5), MKN 421 (0.3), PKS 0727-11 (0.6 and 1.1), B2 1520+31 (0.4), PG 1553+113 (0.2), and PKS 2326-502 (0.4). In parenthesis the daily flux in unit of 10^-6.

The unidentified source J2102+4542 was detected in the last 2 days of the week with a flux of 1 X 10^-6, and 1.4 X 10^-6, respectively. See ATel#2487.

Fluxes are in the unit of photons/cm²/s above 100 MeV. All errors are statistical only.

Note. All the fluxes reported above are from the ASP analysis and should be considered preliminary and should not be used for publication, however they are indicative of the flux range and the current status of a source. Source association is done on the basis of source location, considering spatial coincidence only, and it is not indicative of an identification.
- Please acknowledge the LAT team if you use information from this report.

For questions and comments please contact:

- D. Donato (donato[at]milkyway.gsfc.nasa.gov) for generic information related to this week

- Contact persons on this page for individual sources cited above.

Fermi LAT weekly report N.91

2010-03-22T06:22:00.000-07:00

Covered period: 2010.March.01 - 2010.March.07

LAT Mission week: 91.57 - 92.57

3C 454.3 still bright, detected daily throughout the week, with an average daily flux of 3.1 e-6.

3C273 also bright, detected on 4 days this week with an average daily flux of 2.2 e-6 and reached (3.1+/-0.7)e-6 on the 7th .

The FSRQs PKS 0402-362 and PKS 0426-380 both bright, detected throughout the week and both reached a high daily flux on the 7th: PKS 0402-362 (1.4+/-0.30) e-6 and PKS 0426-380 (1.6+/-0.3) e-6.

PKS 1244-255 exhibited a rapid flare midweek, reaching (1.3+/-0.3) e-6 for the 4th.

4C+21.35 bright on the 2nd at a daily flux of (1.1+/-0.4) e-6.

4C+38.41 and PKS 0527-441 detected most days this week.

Sporadic activity from PKS 0454-234, PKS 0727-11 , PKS 0736-770 and B2 1520+31 .

Fluxes are in the units of photons/cm2/s above 100 MeV. All errors are statistical only.

For questions and comments please contact:

- Anna Cannon (annacannon1984@gmail.com) for generic information related to this week.

- Contact persons on this page for individual sources cited above.

Fermi LAT weekly report N.90

2010-03-22T05:39:00.000-07:00

Covered period: 2010.Feb.22 - 2010.Feb.28

LAT Mission week: 90.57 - 91.57

3C 454.3, as usual, is always present during the week, its daily maximum flux has been detected on Feb. 22 with a value of at (3.2 +/- 0.5) e-6.
Blazar 4C 21.35 reached on Feb. 22 and on Feb. 27 the flux value of (1.3 +/- 0.4)e-6 .

Markarian 421 detected (fading) only on Feb. 22 with a daily flux below 1e-6.

PKS 0537-441 detected most of the week with a daily flux less below 1e-6.

4C 38.41 (S4 1633+38) was in high state on Feb. 23 with a daily flux of (1.5+/-0.4)e-6 (see Atel#2456). In this day the flux of 1FGL J1635.0+3808 (the LAT 1-year point source catalog object associated with 4C +38.41) increased to approximately an order of magnitude with respect to its average flux.

PKS 0426-380 detected a couple of time with a flux around 0.8e-6.

3C 273 reached a daily flux value of (1.6 +/- 0.4)e-6 on Feb. 28.

Other bright (flux above 0.5e-6) extragalactic sources detected during the week are: PKS 0805-07 and S5 0716+714.

Fluxes are in the units of photons/cm2/s above 100 MeV. All errors are statistical only.

For questions and comments please contact:

- Sara Buson (buson@pd.infn.it) and Denis Bastieri (denis.bastieri@pd.infn.it) for generic information related to this week.

- Contact persons on this page for individual sources cited above.

2010-03-04T04:27:00.000-08:00

Covered period: 2010.Feb.15 - 2010.Feb .21

LAT Mission week: 89.57 - 90.57

3C 454.3 still bright with a daily flux at around 3E-6 during this week.

Blazar 4C 21.35 has been bright, detected with a daily flux at about 1E-6 four days in the week.

Markarian 421 was detected on Feb. 16th, 17th and 21th with a daily flux below 0.5E-6. On Feb. 17th, the blazar exhibited a spectral index of 1.4+/-0.2 and TS=111.

PKS 0537-441 detected a couple of times during the week with a daily flux just below 1E-6.

J1332-0509 popped up only on Feb. 16th with a daily flux of ( 0.9 +/- 0.3)E-6.

PKS 0426-380 detected from Feb. 18th to the end of the week, with a daily flux around 1E-6, reaching (3+/-1)E-6 in the first 6h run on Feb. 18th.

B2 1520+31 detected on Feb. 21th with a daily flux of (0.8+/-0.3)E-6.

High-Mass X-ray Binary LSI +61 303 was bright during this week, reaching (4 +/- 1)E-6 in the first 6h run on Feb. 18th.

Fluxes are in the unit of photons/cm²/s above 100 MeV. All errors are statistical only.

Note. All the fluxes reported above are from the ASP analysis and should be considered preliminary and should not be used for publication, however they are indicative of the flux range and the current status of a source. Source association is done on the basis of source location, considering spatial coincidence only, and it is not indicative of an identification.
- Please acknowledge the LAT team if you use information from this report.

For questions and comments please contact:

- Lise Escande (escande@cenbg.in2p3) or Denis Bastieri (denis.bastieri@pd.infn.it) for generic information related to this week

- Contact persons on this page for individual sources cited above.

2010-03-04T03:43:00.000-08:00

Covered period: 2010.Feb.8 - 2010.Feb .14

LAT Mission week: 88.57 - 89.57

3C 454.3 still dominated the extragalactic gamma-ray sky with a daily flux at around 3E-6 and above 4E-6 at the end of the week..

BLLac object PKS0537-441 has been detected with a daily flux just above 1E-6 two times during the week.

Blazar 4C 21.35 has been bright during all the week, reaching a daily flux of (6.1+/-0.6)E-6 on Feb. 8th.

Blazar PKS 0244-470 was in a high state on Feb. 12th with a daily flux of (1.0 +/- 0.2)E-6 (see Atel #2440). This corresponds to approximately an order of magnitude increase with respect to the average flux of 1FGL J0245.9-4652 which is the LAT 1-year point source catalog object associated with PKS 0244-470.

Other bright (Flux>0.5E-6) extragalactic sources detected on weekly timescale :
PKS 0727-11, PKS 0426-380 and PKS 1510-08

Fluxes are in the unit of photons/cm²/s above 100 MeV. All errors are statistical only.

Note. All the fluxes reported above are from the ASP analysis and should be considered preliminary and should not be used for publication, however they are indicative of the flux range and the current status of a source. Source association is done on the basis of source location, considering spatial coincidence only, and it is not indicative of an identification.
- Please acknowledge the LAT team if you use information from this report.

For questions and comments please contact:

- Lise Escande (escande@cenbg.in2p3) or Dario Gasparrini (dario.gasparrini@asdc.asi.it) for generic information related to this week

- Contact persons on this page for individual sources cited above.

LAT Limit on Cyg X-1 during reported AGILE flare

2010-03-04T03:37:00.000-08:00

Cyg X-1 on Oct. 16th, 2009

Following the announcement by the AGILE team of a high energy transient event from Cyg X-1 during 2009-10-15 UTC 23:13:36 to 2009-10-16 UTC 23:02:24 (ApJ article ; astro-ph) we have checked the LAT data for the same time period. AGILE reported a flux of 23.2 +/- 6.6 E-7 ph/cm2/s in the energy range 100 MeV to 3 GeV during the flare period. A preliminary analysis of the data indicates that the LAT does not detect any significant emission from the location of Cyg X-1 averaged over this time period; the 95% confidence upper limit for the 100 MeV to 3 GeV flux is ~4 e-7 ph/cm2/s assuming a power-law photon index Gamma=2.2.

For questions and comments please contact Adam Hill (adam.hill [at] obs.ujf-grenoble.fr)

Extra Note - Feb. 22, 2010

2010-02-22T05:54:00.000-08:00

Mrk 421 on Feb. 22th, 2010

Markarian 421 (EUVE J1104+38.1, QSO B1101+384, RX J1104.4+3812,1FGL J1104.4+3812 ), a gamma-ray blazar with redshift z=0.03 (Healey, S. et al. 2008ApJS..175...97) currently exhibits a high energy flare, specially at X-ray (ATel #2444) and TeV energies (ATel #2443). This source showed a preliminary daily flux above 100 MeV of (0.4 +/- 0.1)E-6 photons/cm2/s with a photon index of 1.6 +/- 0.2 on Feb. 16th and a daily flux of (0.3 +/- 0.1)E-6 photons/cm2/s on Feb. 17th with a photon index 1.4 +/- 0.2 (errors statistical only).

For questions and comments please contact the Flare Advocates on shift (L. Escande (escande@cenbg.in2p3) and D. Bastieri (denis.bastieri@pd.infn.it)).

Fermi LAT weekly report N.87

2010-02-19T22:25:00.000-08:00

Covered period: 2010.Feb.01 - 2010.Feb.07

LAT Mission week: 87.57 - 88.57

The flat-spectrum radio quasar 3C 454.3 was still the brightest source on the sky with a flux of (2.7 +/- 0.2)e-6.
The flat-spectrum radio quasar PKS 0402-362 flared to a flux of (1.0 +/- 0.3)e-6 on February 1, 2010, roughly one order of magnitude higher than the eleven-month average flux of 1FGL J0403.9-3603 (the associated LAT 1-year point source catalog object). Details are reported in ATel #2413.

A new, flaring GeV source was detected by the Fermi LAT on February 1, 2010. The source is located ~1 deg from the Galactic plane. The flux during the one-day period of February 1 was (0.8 +/- 0.3)e-6. Details are reported in ATel #2414. The Fermi LAT report triggered multi-wavelength observations which have been reported in the following ATel's: 2416, 2420, 2421, 2428, 2429, 2433.

The flat-spectrum radio quasar 3C 273 has been bright, with a flux of (1.2 +/- 0.1)e-6 on the one-week timescale.

The flat-spectrum radio quasar 3C 279 has been detected with a flux of (0.5 +/- 0.1)e-6 during the one-week timescale.

Fluxes are in the unit of photons/cm^2/s above 100 MeV.

Note: All the fluxes reported above are by the ASP analysis and should be considered preliminary and should not be used for publication, however they are indicative of the flux range and the current status of a source. Source association is done on the basis of source location, considering spatial coincidence only, and it is not indicative of an identification. - Please acknowledge the LAT team if you use information from this report.

For questions and comments please contact:

- J. Vandenbroucke (justinv[at]stanford.edu) for generic information related to this week

- Contact persons on this page for individual sources cited above.

Fermi lat weekly report N.85

2010-02-16T01:09:00.000-08:00

Covered period: 2010.Jan.18 - 2010.Jan.24

LAT Mission week: 85.57 - 86.57

3C 454.3 still dominates extragalactic gamma-ray sky with the flux of (5.7 +/-0.3)*10^-6.

OX 169 flared on January 18, 2010, peaking at flux (1.4 +/-0.4)*10^-6, reported in ATel #2393.

PKS 0420-01 showed a gradual increase of gamma-ray flux in the last ~40 days. On January 21, 2010, is showed a flare with a peak flux of (0.8 +/-0.2)*10^-6. On the same day, BL Lacertae showed a short gamma-ray flare with the peak flux of (1.1 +/-0.5)*10^-6 in the six-hour interval centered on 2010 January 21.375 (UT). These events were reported in ATel #2402.

3C 66A was detection on weekly timescale with a high significance level and flux of (0.27 +/-0.06)*10^-6. However, no exceptional activity of this source was observed.

ATel #2403 reported detection of a new unidentified gamma-ray source in the Galactic plane by AGILE satellite. Preliminary analysis revealed no Fermi/LAT sources near the reported position both on daily and weekly timescales...

Other bright (flux>0.5) extragalactic sources detected on weekly timescale:
PKS 1510-08, CGRaBS J2345-1555, PKS 0402-362, 4C 21.35, 4C 38.41

Fluxes are in the unit of photons/cm²/s above 100 MeV. All errors are statistical only.

Note. All the fluxes reported above are from the ASP analysis and should be considered preliminary and should not be used for publication, however they are indicative of the flux range and the current status of a source. Source association is done on the basis of source location, considering spatial coincidence only, and it is not indicative of an identification.
- Please acknowledge the LAT team if you use information from this report.

For questions and comments please contact:

- Kirill Sokolovsky (ksokolov [at] mpifr-bonn.mpg.de) for generic information related to this week.

- Contact persons on this page for individual sources cited above.

LAT Limit on M87 during TeV Flare

2010-02-11T19:22:00.001-08:00

Following the announcement by the MAGIC team of a TeV flare from M87, http://www.astronomerstelegram.org/?read=2431, we have checked the LAT data for the same time period. The 95% confidence upper limit for E>100 MeV for one day of observation is 1.3 e-7 ph/cm2/s assuming a photon index Gamma=2.26 which was the average for the first 10 months of the mission.

Fermi LAT weekly report N. 86

2010-02-07T01:54:00.000-08:00

Covered period: 2010, Jan. 25 - 2010,
Jan. 31 (UT)

LAT Mission week: 86.57 - 87.57

Brightest blazars of the week are 3C 454.3, PKS 1501-08, PKS 0537-441, PKS 0402-362 (LAT ATEL #2402, above 1.3 on Jan.25), PKS 0426-380 (LAT ATel#2366).

Non-confirmation of source in AGILE's ATEL #2403 in the same time interval and weekly interval.

Special appearance of PKS 0244-470 on Jan.26.

PMN J2345-1555 (1FGL J2344.6-1554, z= 0.621, FSRQ) flared at the 1E-6 threshold on Jan. 27. ATel#2408 submitted.

PKS 0521-36 (1H 0515-363, 3EG J0530-3626, possible BL Lac object even if classified also as FSRQ/Sey1/FRII in literature, z=0.055) popped up only on Jan. 29 at daily flux about 0.7E-6, photon index around 2. Low redshift source of possible interest for TeV telescopes.

S5 0716+71 and Mkn 421 detected a couple of times during the week with daily flux below 0.4E-6.

Fluxes are in the unit of photons/cm^2/s above 100 MeV.

Note. All the flux reported above are by the ASP analysis and should be considered preliminary and should not be used for publication, however they are indicative of the flux range and the current status of a source. Source association is done on the basis of source location, considering spatial coincidence only, and it is not indicative of an identification. - Please acknowledge the LAT team if you use information from this report.

For questions and comments please contact:

- S. Ciprini (stefano.ciprini[at]pg.infn.it) for generic information related to this week

- Contact persons on this page for individual sources cited above.