Why do broad line AGN show up among faint hard X-ray sources?

Details Why do broad line AGN show up among faint hard X-ray sources? Why do broad line AGN show up among faint hard X-ray sources?

Dec 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001aipc..599..782m&link_type=abstract

X-RAY ASTRONOMY: Stellar Endpoints,AGN, and the Diffuse X-ray Background. Edited by Nicholas E. White, Giuseppe Malaguti, and G

Astronomy and Astrophysics

Astronomy

1

X-Ray Sources, X-Ray Bursts, Quasars, Background Radiations, Galactic Nuclei, Circumnuclear Matter, And Bulges

Scientific paper

We have assembled a sample of ROSAT sources that are harder than the X-ray Background (XRB). By studying a hard X-ray spectrum population we are trying to discover the nature of the as yet unidentified source population needed to resolve the XRB spectral paradox. Current theory would suggest that narrow line QSOs (so called QSO2 objects) should be important, but we find that broad line AGN predominate. Here we discuss the nature of the broad line AGN and show that the absorption responsible for hardening the X-ray spectrum has a variety of optical signatures. .

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