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Title:
Fermi LAT detection of a GeV flare from blazar PKS 1622-253
Authors:
Reyes, Luis, C.
Publication:
The Astronomer's Telegram, #2231
Publication Date:
10/2009
Origin:
ATEL
Keywords:
Gamma Ray, >GeV, Transients
Bibliographic Code:
2009ATel.2231....1R

Abstract

The Large Area Telescope (LAT), one of the two instruments on the Fermi Gamma-ray Space Telescope, has observed an increasing gamma-ray flux from a source positionally consistent with PKS 1622-253 (RA: 16h25m46.9s, Dec: -25d27'38", J2000). Preliminary analysis indicates that the source on Oct 4 was in a high state with a gamma-ray flux (E>100MeV) of (1.9 +/- 0.2) x 10-6 ph cm-2 s-1. This corresponds to a relative increase up to a factor of ~17 with respect to the average flux of PKS 1622-253 during the first year of Fermi operation.
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