Fermi LAT detection of a GeV flare from BL Lac PKS 0537-441

Details Fermi LAT detection of a GeV flare from BL Lac PKS 0537-441 Fermi LAT detection of a GeV flare from BL Lac PKS 0537-441

Jul 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009atel.2124....1b&link_type=abstract

The Astronomer's Telegram, #2124

Astronomy and Astrophysics

Astronomy

3

Gamma Ray, >Gev, Request For Observations, Agn, Quasars

Scientific paper

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 0537-441, one of the most variable BL Lac objects (z=0.894, Peterson et al. 1976, ApJ, 207, L5). LAT observations have shown an increasing flux for the past three weeks, reaching, above 100 MeV, 1.0 +/- 0.4 10^-6 ph cm^-2 s^-1 on July 8.

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