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Soft X-ray Spectra of Seyfert Galaxies

Published online by Cambridge University Press:  07 August 2017

C. M. Urry ,
J. S. Kruper  and
C. R. Canizares
C. M. Urry
Affiliation:
Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218
J. S. Kruper
Affiliation:
Center for Space Research, 37-501, Massachusetts Institute of Technology, Cambridge, MA 02139
C. R. Canizares
Affiliation:
Center for Space Research, 37-501, Massachusetts Institute of Technology, Cambridge, MA 02139

Extract

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The first X-ray (2–10 keV) spectral surveys of active galactic nuclei (AGN) were remarkably uniform, with spectral indices narrowly distributed about α=0.65, independent of radio-emitting properties or X-ray luminosity (Mushotzky 1984). In the few AGN detected above 20 keV, this canonical power law extended to at least 50 keV (Rothschild et al. 1983, Pounds 1985, Worrall et al. 1980; Halpern 1982; Worrall and Marshall 1984). In practice these surveys were dominated by low luminosity Seyfert 1 galaxies.

Type
Part 3: X-rays and the Central Source
Information
Symposium - International Astronomical Union , Volume 134: Active Galactic Nuclei , 1989 , pp. 173 - 174
Copyright
Copyright © Kluwer 1989 

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