Tuesday, May 25, 2010

Fermi LAT weekly report N. 101

Covered period: 2010.May.10 - 2010.May.16

LAT Mission week: 101.57 - 102.57

  • Blazars PKS 1424-41, 4C 21.35 (also known as PKS 1222+21), 3C 454.3 very bright (daily flux above 2E-6 during most of the week).

  • For the first time from the launch of Fermi, the LAT source 1FGL J1033.8+6048 (associated to two FSRQ sources, S4 1030+61, a.k.a. TXS 1030+611, z=1.4009, and GB6 J1032+6051, z=1.064) flared above the 1E-6threshold. ATel#2622 published. Follow up by ground-based telescopes and Swift confirm the identification with S4 1030+61 (related following ATels). Weekly averaged flux is about 0.5E-6.

  • PKS 0537-441 dimmed during the week.

  • PKS 0301-243 reached the daily flux threshold of 1E-6 on May 11. Weekly averaged flux is about 0.3E-6.

  • BL Lac relatively bright (in particular reached a daily flux around 0.7E-6 on May 11, and weekly averaged flux about 0.26E-6), as well as Mkn 421 (weekly averaged flux about 0.1E-6).

  • Sporadic daily detections of blazars OP 313, 3C 273, PKS 0426-380, and PKS 2155-304.

  • Other blazars detected on weekly timescale, among others, are 3C 66A, NGC 1275, PMN J0850-1213, PKS 2227-08, B2 1520+31, PKS 0332-403.

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:

- S. Ciprini (stefano.ciprini[at]pg.infn.it) for generic information related to this week

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

No comments: