Thursday, September 29, 2011

Fermi LAT weekly report N. 172



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.




Monday, September 26, 2011

Fermi LAT weekly report N. 171

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.



Monday, September 19, 2011

Fermi LAT weekly report N. 170



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.




Wednesday, September 14, 2011

Fermi LAT weekly report N. 169



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.




Friday, September 2, 2011

Fermi LAT weekly report N. 167



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



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.