Fermi LAT and INTEGRAL detection of increasing high-energy activity of blazar 3C279

Details Fermi LAT and INTEGRAL detection of increasing high-energy activity of blazar 3C279 Fermi LAT and INTEGRAL detection of increasing high-energy activity of blazar 3C279

Aug 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009atel.2154....1i&link_type=abstract

The Astronomer's Telegram, #2154

Astronomy and Astrophysics

Astronomy

6

X-Ray, Gamma Ray, >Gev, Agn, Quasars

Scientific paper

The Large Area Telescope (LAT), one of two instruments on the Fermi Gamma-ray Space Telescope, has observed, by weekly data averages, an active state during the last 5 weeks with a rising gamma-ray flux during the last 3 weeks in the gamma-ray flux from a source positionally consistent with the blazar 3C279 (J2000, R.A.: 12h56m11.1665s, Dec: 05d47m21.523s). Preliminary analysis indicates that the source was in a high state with a gamma-ray flux (E>100 MeV) of (1.38 +/- 0.12) x 10^-6 ph cm^-2 s^-1 (statistical uncertainty only) during the week 2009 Jul 29 - Aug 04, a factor of 2 higher than the steady source level during the past months.

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