Fermi LAT detection of gamma-ray re-brightening of blazar PKS1510-089

Details Fermi LAT detection of gamma-ray re-brightening of blazar PKS1510-089 Fermi LAT detection of gamma-ray re-brightening of blazar PKS1510-089

Apr 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009atel.2033....1c&link_type=abstract

The Astronomer's Telegram, #2033

Astronomy and Astrophysics

Astronomy

6

Gamma Ray, Agn

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 April 25th, 2009, a 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 on 25th April the source was in a high state with a gamma-ray flux (E>100MeV) of 6.5+/-0.7e-6 cm^-2 s^-1 (statistical only) in the daily time scale and it reached a value of 8.2+/-1.9e-6 cm^-2 s^-1 (statistical only) in the 6-hours interval starting at 06:00 UT of the same day.

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