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EGRET observations of 3C 273The 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.
Document ID
19930044902
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Von Montigny, C. (Max-Planck-Inst. fuer Extraterrestrische Physik Garching, Germany)
Bertsch, D. L. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Fichtel, C. E. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Hartman, R. C. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Hunter, S. D. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Kanbach, G. (Max-Planck-Inst. fuer Extraterrestrische Physik Garching, Germany)
Kniffen, D. A. (Hampden-Sydney College VA, United States)
Kwok, P. W. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Lin, Y. C. (Stanford Univ. CA, United States)
Mattox, J. R. (NASA Goddard Space Flight Center; Computer Sciences Corp. Greenbelt, MD, United States)
Date Acquired
August 16, 2013
Publication Date
January 1, 1993
Publication Information
Publication: Astronomy and Astrophysics Supplement Series
Volume: 97
Issue: 1
ISSN: 0365-0138
Subject Category
Astronomy
Report/Patent Number
ISSN: 0365-0138
Accession Number
93A28899
Funding Number(s)
CONTRACT_GRANT: BMFT-50-QV-90955
Distribution Limits
Public
Copyright
Other

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