Sunday, April 17, 2011

Fermi LAT weekly report N. 148

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 ( for generic information related to this week

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

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