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Unconventional AGN in hard X-ray surveys

✍ Scribed by A. Comastri; M. Brusa; M. Mignoli; The Hellas2xmm Team

Publisher
John Wiley and Sons
Year
2003
Tongue
English
Weight
187 KB
Volume
324
Category
Article
ISSN
0004-6337

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✦ Synopsis

Abstract

Extensive programs of follow–up observations of hard X–ray selected sources have unambiguously revealed that the sources of the X–ray background are characterized by an extremely large dispersion in their optical magnitude and spectroscopic classification. Here we present the results of an attempt to understand the nature of the observed variety using a simple prescription for their optical to X–ray energy distribution.

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