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EGRET High-Energy Gamma-ray Observations of AGN: Energy Spectra and Time Variability

Published online by Cambridge University Press:  19 July 2016

D.J. Thompson ,
D.L. Bertsch ,
B.L. Dingus ,
J. A. Esposito ,
C.E. Fichtel ,
R.C. Hartman ,
S.D. Hunter ,
P. Sreekumar ,
J. Chiang  and
J. M. Fierro
...Show all authors
D.J. Thompson
Affiliation:
NASA/Goddard Space Flight Center Greenbelt, Maryland 20771 USA
D.L. Bertsch
Affiliation:
NASA/Goddard Space Flight Center Greenbelt, Maryland 20771 USA
B.L. Dingus
Affiliation:
NASA/Goddard Space Flight Center Greenbelt, Maryland 20771 USA
J. A. Esposito
Affiliation:
NASA/Goddard Space Flight Center Greenbelt, Maryland 20771 USA
C.E. Fichtel
Affiliation:
NASA/Goddard Space Flight Center Greenbelt, Maryland 20771 USA
R.C. Hartman
Affiliation:
NASA/Goddard Space Flight Center Greenbelt, Maryland 20771 USA
S.D. Hunter
Affiliation:
NASA/Goddard Space Flight Center Greenbelt, Maryland 20771 USA
P. Sreekumar
Affiliation:
NASA/Goddard Space Flight Center Greenbelt, Maryland 20771 USA
J. Chiang
Affiliation:
Stanford University Stanford, California, 94305 USA
J. M. Fierro
Affiliation:
Stanford University Stanford, California, 94305 USA
Y.C. Lin
Affiliation:
Stanford University Stanford, California, 94305 USA
P.F. Michelson
Affiliation:
Stanford University Stanford, California, 94305 USA
P.L. Nolan
Affiliation:
Stanford University Stanford, California, 94305 USA
G. Kanbach
Affiliation:
Max Planck Institut für Extraterrestrische Physik Giessenbachstr, 85748 Garching Germany
H.A. Mayer-Hasselwander
Affiliation:
Max Planck Institut für Extraterrestrische Physik Giessenbachstr, 85748 Garching Germany
C.V. Montigny
Affiliation:
Max Planck Institut für Extraterrestrische Physik Giessenbachstr, 85748 Garching Germany
H.-D Radecke
Affiliation:
Max Planck Institut für Extraterrestrische Physik Giessenbachstr, 85748 Garching Germany
D.A. Kniffen
Affiliation:
Hampden-Sydney College Hampden-Sydney, Virginia, 23943 USA
J.R. Mattox
Affiliation:
Compton Observatory Science Support Center, operated by Astronomy Programs, Computer Sciences Corporation Greenbelt, MD 20770 USA
E.J. Schneid
Affiliation:
Grumman Aerospace Corporation Bethpage, New York 11714 USA

Abstract

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The Energetic Gamma Ray Experiment Telescope (EGRET) on the Compton Gamma Ray Observatory has detected more than 20 Active Galactic Nuclei (AGN) at photon energies above 30 MeV.

Type
New Observations of AGN with Specific Instruments
Information
Symposium - International Astronomical Union , Volume 159: Multi-Wavelength Continuum Emission of AGN , 1994 , pp. 49 - 52
Copyright
Copyright © Kluwer 1994 

References

Bertsch, D.L. et al.: 1993, ‘Detection of Gamma-Ray Emission from the Quasar PKS 0208–512’, ApJ 405, pp. L21–L24.Google Scholar
Collmar, W. et al.: 1993, ‘Preliminary COMPTEL Results on the Quasar PKS 0528+134’, Proc. 23rd Inter. Cosmic Ray Conf. (Calgary) , 1, pp. 168–171.Google Scholar
Hunter, S.D. et al.: 1993, ‘Detection of High-Energy Gamma Rays from Quasar PKS 0528+134 by EGRET on the Compton Gamma Ray Observatory’, ApJ 409, pp. 134–138.Google Scholar
Kühr, H., Witzel, A., Pauliny-Toth, I.I.K., and Nauber, U.: 1991, ‘A Catalogue of Extragalactic Radio Sources Having Flux Densities Greater than 1 Jy at 5 GHz’, A&ASuppl 45, pp. 367–430.Google Scholar