What can be learnt from extragalactic X-
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A.C. Fabian
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Article
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2003
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John Wiley and Sons
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English
β 129 KB
π 2 views
## Abstract Extragalactic Xβray surveys reveal many Active Galactic Nuclei (AGN) as well as clusters and groups of galaxies. Many of the AGN are obscured, leading to the hard spectrum of the Xβray Background. Constraints from the absorptioncorrected Xβray Background spectrum and the local mass dens