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EGRET observations of 3 C 273The quasar 3C 273 was detected by the Compton Observatory Satellite (COS-B) in the 1970's. Energetic Gamma Ray Experiment Telescope (EGRET) observations of this sky region in Jun. and Oct. 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 0.0000003/sq cm(exp -2) sec(exp -1) for energies greater than 100 MeV. During the Oct. observation it appears to be even lower. For the first observation a preliminary spectrum was derived which was a photon index of 2.4.
Document ID
19940014991
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Vonmontigny, C. (Max-Planck-Inst. fuer Physik und Astrophysik 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 Physik und Astrophysik Garching, Germany)
Kniffen, D. A. (Hampden-Sydney Coll. 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 Greenbelt, MD, United States)
Date Acquired
September 6, 2013
Publication Date
October 1, 1992
Publication Information
Publication: Max-Planck-Inst. fuer Physik und Astrophysik, EGRET Mission and Data Analysis
Subject Category
Astronomy
Accession Number
94N19464
Funding Number(s)
CONTRACT_GRANT: BMFT-50-90955
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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