Fermi-LAT detection of another rapid GeV flare from the blazar PKS 1510-089

Details Fermi-LAT detection of another rapid GeV flare from the blazar PKS 1510-089 Fermi-LAT detection of another rapid GeV flare from the blazar PKS 1510-089

Jan 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009atel.1897....1c&link_type=abstract

The Astronomer's Telegram, #1897

Astronomy and Astrophysics

Astronomy

6

Gamma Ray, >Gev, Agn, Quasars, Transients

Scientific paper

The Large Area Telescope (LAT), one of two instruments on the Fermi Gamma-ray Space Telescope (formerly GLAST, launched June 11, 2008), has observed, since January 08, 2009, a rapid flare from a gamma-ray source positionally consistent with the blazar PKS 1510-089 (RA:15h12m50.5329s, Dec:-09d05m59.828s, redshift 0.360 and already known as an EGRET gamma-ray source, 3EG J1512-0849). Preliminary analysis indicates that the source is in a high state with a gamma-ray flux (E>100MeV) exceeding the pre-defined LAT flaring source reporting threshold of 2x10^-6 photons cm^-2 s^-1. This is the second time that Fermi is observing and announcing a similar GeV flare in this blazar (September 2008, >ATEL#1743) that was also well detected previously in 2008 by AGILE (>ATEL#1436).

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