Saturday, April 14, 2012

Fermi LAT weekly report N. 200

Covered period: 2012.April.02 - 2012.April.08

LAT Mission week: 200.57 - 201.57

  • A new transient gamma-ray source near the Galactic plane (b = -8.1 deg) was detected on April 7, 2012 with a daily flux of (1.0±0.3)x10-6. On April 8, 2012 the source reached a daily flux of (1.6±0.3)x10-6. Based on one week of Fermi LAT monitoring data the origin of this gamma-ray source was localized to RA,Dec: 17h17m14.64s, -51h56m49.20s, with a 95% confidence error circle radius of 0.18 deg. The nearby compact radio source PMN J1717-5155 is consistent with the LAT position (ATel #4023), which is probably a gamma-ray blazar (ATel #4029).

  • BL Lacertae was detected on April 5 with a flux of (1.4±0.3)x10-6. It was also detected on April 2nd and 7th with a flux of ~0.6x10-6.

  • PKS 1510-089 was detected with a flux of (1.5±0.5)x10-6 and (1.2±0.4)x10-6 on April 4th and 8th, respectively.

  • PKS 1424-413 was detected with a flux of (1.2±0.3)x10-6 on April 6th
  • .

  • Sporadic activity (fluxes below 1x10-6): PKS 2326-502 (April 5-6), PKS 0426-380 (April 6-8), PKS 0537-441 & PKS 2255-282 (April 4), PKS 0716+714 (April 2), B2 1520+31, PKS 2155-304, and Mrk 421 (all April 3 and 6)

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:

For questions and comments please contact:
- F. Schinzel (fsch[at] for generic information related to this week

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

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