Thursday, March 21, 2013

Fermi LAT Weekly report N. 249

Covered period: 2013 Mar. 11-17
LAT Mission week: 249.57 - 250.57

  • Gamma-ray flare from a source positionally consistent with the flat spectrum radio quasar S5 1217+71 (also known as TXS 1217+713 and 2FGL J1219.2+7107,z=0.451). The source is detected on March 11 with daily flux (0.6 +/- 0.2)E-6 and on March 12 with daily flux (0.5 +/- 0.1)E-6, about 90 times greater than the average flux reported in the 2FGL catalog (see ATel#4885).
  • PKS 1424-41 in enduring flaring state (daily flux between 1.1E-6 and 1.6E-6).
  • PKS 1510-08 in high state (about 1.9E-6) from March 11 to March 13 then fading in the following days of the week.
  • NGC 1275 in high state (detected with daily flux 0.7E-6 all the days from March 15 to 17).
  • Mkn 421 rather active (detected all the days with a daily flux between 0.4E-4 and 0.6E-6).
  • Rapid flare of CTA 102 on March 15 (1.3E-6). 
  • 3C 454.3 detected at a daily flux level of 0.8E-6 on March 13 and 14.
  • Crab nebula source dimmed at a level of about 4E-6 in the second half of the week.
  • Other blazars detected, also in a single day, during the week, with daily flux value equal or below 0.6E-6 are: PKS 1124-186, PKS 0537-441, PKS 0426-380, PKS 0454-234, 4C +38.41 (also known as B2 1633+38, OS 356), and PKS 1830-211.

Fluxes are in the unit of photons/cm^2/s above 100 MeV. All uncertainties are statistical only.

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:
- S. Ciprini (stefano.ciprini[at] for generic information related to this week
- Contact persons on this page for individual sources cited above.

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