Fermi LAT detection of increasing gamma-ray flux from B2 1520+31

Details Fermi LAT detection of increasing gamma-ray flux from B2 1520+31 Fermi LAT detection of increasing gamma-ray flux from B2 1520+31

Nov 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010atel.3050....1s&link_type=abstract

The Astronomer's Telegram, #3050

Astronomy and Astrophysics

Astronomy

Gamma Ray, >Gev, Agn, Blazar

Scientific paper

The Large Area Telescope (LAT), one of the two instruments on the Fermi Gamma-ray Space Telescope, has detected enhancement of the gamma-ray flux of a source positionally consistent with the Flat Spectrum Radio Quasar B2 1520+31 (RA: 15 22 09.99 , Dec: +31 44 14.4 , J2000, A. J. Beasley et al. 2002, ApJS, 41, 13 ) with a redshift of z=1.487 (D. Sowards-Emmerd et al. 2005, ApJ, 626, 95). Preliminary analysis indicates that the source flux was (1.8±0.3)x10-6 photons cm-2 s-1 (E>100 MeV, where errors are statistical only) on November 18.

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