Tuesday, November 2, 2010

Fermi LAT weekly report N.123

Covered period: 2010 Oct. 11 - 17

LAT Mission week: 123.57 - 124.57

  • Outburst of high-redshift and gravitationally lensed FSRQ PKS 1830-211 (z=2.507), with important gravitational magnification and Galactic absorption features. The source on October 14, 2010 showed a bright gamma-ray outburst with a daily flux of (5.2+/-1.1)E-6 more than a factor of 12 greater than reported in the Fermi-LAT 1st year catalog (ATel#2943). The flux was higher on Oct. 15 (7.8+/-0.9)E-6, about 18 times the 1-year catalog average flux).

  • PKS 2155-304 reached the threshold of daily flux (1.0+/-0.3)E-6, with photon index 2.6+/-0.3 (ATel#2944). 

    This index value can be due to statistical dispersion and flux-index correlation at low test statistics
    values, close to the sensitivity curve, rather than to a real softer-when-brighter behavior of this high-energy peaked

  • CRATES J0531-4827 bright during the week. 

  • 3C 454.3 bright above daily flux 2E-6.

    The flare of 4C 21.35 is continuing also this week (daily flux above 2E-6).

  • PKS 1329-049 flare at about 1.7E-6 id a day of the week.

    Other sporadic detected blazars: PKS 2326-502, PKS 0208-512, B2 1520+31, PKS
    0426-380, S4 1030+61, PKS 2142-75, B2 0619+33, Mkn 421, 4C 38.41 (B2 1633+38), B2 1846+32A, GB6 J1722+6105, PKS 0537-441, PKS 0244-470

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

Note. All the fluxes 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.

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