Fermi LAT weekly report N.114

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Covered period: 2010 Aug. 09 - 15 

LAT Mission week: 114.57 - 115.57

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• 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.

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.

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Fermi LAT weekly report N. 112

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

LAT Mission week: 113.57 - 114.57

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• 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.

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 listed on this page for individual sources.

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Fermi LAT weekly report N. 111

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Covered period: 2010.07.26-2010.08.01

(Mission week: 112.57-113.57)

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• 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

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Non-detection of AGL J2241+4454

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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

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Covered period: 2010.Jul.19 - 2010.Jul.25

LAT Mission week: 111.57 - 112.57

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• 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.

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Fermi LAT weekly report N. 109

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Covered period: 2010.Jul.12 - 2010.Jul.18

LAT Mission week: 110.57 - 111.57

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• 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.

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Fermi LAT weekly report N. 108

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Covered period: 2010.Jul.5 - 2010.Jul.11

LAT Mission week: 109.57 - 110.57

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• 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.

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