Fermi LAT weekly report N. 156

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Covered period: 2011.May.30 - 2011.June.05

LAT Mission week: 156.57 - 157.57

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• PMN J1123-6417 was detected in flaring state on May 30, with a daily flux of (1.4+/-0.4)e-6 (ATel #3394). PMN J1123-6417 is a likely AGN of uncertain type at a Galactic latitude, b=-3 deg. This association is confirmed also by Mahony et al. (2010) using the AT20G survey catalog. No redshift is known for this object.



• A gamma-ray flare from the high-redshift (z=2.07) blazar PKS 0528+134 was detected on June 5, 2011, with a daily flux of (1.1+/-0.4)e-6 (ATel #3412).



• PKS 1622-253 detected in flaring state on June 4 and 5, with a daily flux of (1.1+/-0.3)e-6 and (1.0+/-0.3)e-6, respectively. This high activity reached a peak flux of (2.0+/-0.3)e-6 on June 7 and has continued in the following days, as reported in the ATel #3424.



• CTA 102 detected very bright on 31 May, with a daily flux of (2.5+/-0.5)e-6.



• PMN J2345-1555 detected in high state between 30 May and 3 June, with a decreasing flux from (1.0+/-0.2)e-6 to (0.7+/-0.2)e-6.



• 4C +38.41 detected bright on May 30, May 31, and June 2, with daily flux between 1.1e-6 and 1.3e-6.



• B2 1520+31 detected in high state on June 4 and 5, with a daily flux of (1.0+/-0.3)e-6 and (1.4+/-0.4)e-6, respectively.



• NGC 1275 detected in high state on May 31, June 1 and June 4 with a daily flux between (0.9+/-0.3)e-6 and (0.3+/-0.1)e-6.



• BL Lac detected on May 30, May 31 and June 4, with a daily flux between 0.6e-6 and 0.8e-6.



• 3C 279 detected bright on June 2 and 3, with a daily flux between 1.0e-6 and 1.2e-6.



• Sporadic daily detections of blazars: CGRaBS J1849+6705 (June 1), CRATES J0850+4854 (June 2), PKS 1424-41 (June 2), PKS 2052-47 (June 2).

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:

- F. D'Ammando (dammando[at]ifc.inaf.it) for generic information related to this week

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

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