Exploring the Hard X-ray sky with XMM-Newton

Details Exploring the Hard X-ray sky with XMM-Newton Exploring the Hard X-ray sky with XMM-Newton

Oct 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004mas..conf...41p&link_type=abstract

MULTIWAVELENGTH AGN SURVEYS. Proceedings of the Guillermo Haro Conference 2003. Held 8-12 December 2003 in Cozumel, Mexico. Edit

Astronomy and Astrophysics

Astronomy

Scientific paper

We report on a spectroscopic study of 90 hard X-ray sources observed with XMM-Newton. This work provides the first step in the detailed study of the X-ray spectral properties of hard X-ray selected sources detected at faint fluxes (F2-10 ≥ 10-14 erg cm-2 s-1) near the knee of the LogN-LogS distribution. Our results illustrate well how a wide-angle survey allows population studies to be made as well as enabling tight constraints to be placed on some parameters of synthesis models of the Cosmic X-ray Background. In particular, we find for the first time that the fraction of absorbed sources at F2-10 ≥ 10-14 erg cm-2 s-1 is about a factor of 2 lower than expected on the basis of current synthesis models of the CXB.

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