EGRET observations of 3C 273

Details EGRET observations of 3C 273 EGRET observations of 3C 273

Jan 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993a%26as...97..101v&link_type=abstract

Astronomy and Astrophysics Supplement Series (ISSN 0365-0138), vol. 97, no. 1, p. 101-103.

Astronomy and Astrophysics

Astronomy

42

Gamma Ray Astronomy, Quasars, Astronomical Spectroscopy, Cos-B Satellite, Gamma Ray Spectra

Scientific paper

The quasar 3C 273 was detected by COS-B in the 1970's. EGRET observations of this sky region in June and October 1991 revealed a flux from 3C 273 lower than that measured by COS-B. The flux observed by EGRET in the June period is approximately 3 x 10 exp -7/sq cm s for energies greater than 100 MeV. During the October observation it appears to be even lower. For the first observation a preliminary spectrum which has a photon index of 2.4 has been derived.

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