Saturday, May 12, 2012

Fermi LAT Weekly Report N. 204

Covered period: 2012.Apr.30 - 2012.May.06
LAT Mission week: 204.57 - 205.57

  • OG 050 reached a record daily flux level of 1.4±0.4) X 10-6 on Apr 30, which is 16 times its average 2FGL flux. This source is known to the community as an earlier Astronomer’s Telegram (ATel#3750) reported a flare in November 2011 when it had a daily flux of 1.1 X 10-6 (and a 6-hour flux of 2 X 10-6). It was only detected one other day during this week: on May 5 with a daily flux of (0.7±0.3) X 10-6.
  • An unassociated source at a daily flux level of (0.9±0.2) X 10-6 was detected well off the Galactic plane on May 1. A plausible counterpart was found in the QSO PKS 1346-112. This possible association has been known to the community through an Astronomer’s Telegram (ATel#3788) issued on 29 Nov 2011 when the daily flux was 1.2±0.2) X 10-6.
  • An unassociated source ASPJ122102m070351 was detected (TS=27) well off the Galactic plane on May 3, at a daily flux of (0.8±0.2) X 10-6 which is 44 times its flux in the 2FGL catalog (1FGL J1221.4-0635, 2FGL J1221.4-0633).
  • S5 0716+71 was detected every day from April 30 through May 4 with flux in the range (0.3-0.6)±0.1 X 10-6.
  • PKS 2326-502 was detected from May 4 through May 6 brightening from 0.3 to 0.8 X 10-6.
  • Sporadic daily detections of blazars (fluxes below 1 X 10-6): 3C 273, PKS 1424-418, BL Lacertae, PKS 1244-255, Ton 599, B2 1520+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:
- R. Ojha (Roopesh.Ojha[at] for generic information related to this week
- Contact persons on this page for individual sources cited above.

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