Sunday, May 8, 2011

Fermi LAT weekly report N. 150

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] for generic information related to this week

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

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