Monday, March 11, 2013

Fermi LAT Weekly Report N. 247

Covered period: 2013.Feb.25 - 2013.Mar.03
LAT Mission week: 247.57 - 248.57

  • The daily averaged gamma-ray flux from the Crab Nebula region reached (8.3+/-0.7) on March 3 which is a factor of 3 greater than its average 2FGL flux (see ATel#4855). This triggered pointed TOO observations by Fermi LAT starting on March 4.
  • PKS 0502+049 was detected in a flaring state on March 2 with a daily averaged flux of (1.0+/-0.2) (see ATel#4858).
  • Following the announcement by the AGILE team (ATel#4842) of the possible detection of a new unidentified gamma-ray source (AGL J1647+5107) the LAT data for the same sky position and time period were checked. Preliminary analysis revealed no detection above 100 MeV by Fermi LAT as well as no visible photon-excess in the count map region around the specified position.
  • A modest increase in flux was detected from the Sun on March 1 with a daily averaged flux of (0.6+/-0.2). No corresponding signs of activity were noticed on the 3-day GOES Proton Flux Monitor.
  • PKS 1424-418 was detected every day except Feb 25 with daily averaged flux between (1.1+/-0.3) and (1.8+/-0.3).
  • MG1 J123931+0443 was detected on February 28 and March 1 with daily averaged fluxes (1.1+/-0.4) and (0.7+/-0.2), respectively.
  • Sporadic daily detections of blazars and other AGN (fluxes below 1): 4C 38.41, NGC 1275, Mrk 421.
  • Fluxes are in the unit of 10-6 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:
    - Roopesh 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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