The complex X ray spectra of AGN

Details The complex X ray spectra of AGN The complex X ray spectra of AGN

Nov 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989esasp.296..789u&link_type=abstract

In ESA, The 23rd ESLAB Symposium on Two Topics in X Ray Astronomy. Volume 2: AGN and the X Ray Background p 789-795 (SEE N90-258

Astronomy and Astrophysics

Astronomy

19

Active Galactic Nuclei, Seyfert Galaxies, Spectrum Analysis, X Ray Spectra, Accretion Disks, Background Radiation, Black Holes (Astronomy), Proportional Counters, Quasars, X Ray Sources

Scientific paper

X-ray spectral surveys of large samples of Seyfert galaxies are discussed. The spectral shape in the 0.1 to 20 keV energy range is considered. Two new spectral survey are undertaken, one involving 105 Imaging Proportional Counter (IPC) observations of 75 Seyfert galaxies, the other using IPC and Monitor Proportional Counter (MPC) data from 28 observations of 23 Seyfert galaxies. The X-ray spectra of active galactic nuclei (AGN) are complex, with in most cases considerable steepening at the lowest energies. At higher energies (2 to 20 keV), the existence of a universal, canonical power law is confirmed, independent of X-ray luminosity over four orders of magnitude.

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