Fermi LAT detection of a GeV flare from new gamma-ray blazar PKS 1118-056

Details Fermi LAT detection of a GeV flare from new gamma-ray blazar PKS 1118-056 Fermi LAT detection of a GeV flare from new gamma-ray blazar PKS 1118-056

Feb 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009atel.1932....1r&link_type=abstract

The Astronomer's Telegram, #1932

Astronomy and Astrophysics

Astronomy

1

Gamma Ray, >Gev, Transients

Scientific paper

The Large Area Telescope (LAT), one of the two instruments on the Fermi Gamma-ray Space Telescope (formerly GLAST, launched June 11, 2008), has observed an increasing gamma-ray flux from a source positionally consistent with PKS 1118-056 (RA: 11h21m25.1s , Dec: -05d53m56s , J2000). Preliminary analysis indicates that the source on Feb 17 was in a high state with a gamma-ray flux (E>100MeV) of (0.4 +/- 0.1) x 10-6 ph cm-2 s-1, which represents a ten-fold increase in flux with respect to the average preliminary flux observed during the first 6 months of data of the Fermi mission (~0.04 x 10-6 ph cm-2 s-1) PKS 1118-056 (z=1.297; M.J.

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