Uncovering Obscured AGN with EXIST and Other Hard X-Ray Surveys

Details Uncovering Obscured AGN with EXIST and Other Hard X-Ray Surveys Uncovering Obscured AGN with EXIST and Other Hard X-Ray Surveys

Dec 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006aas...209.5406u&link_type=abstract

2007 AAS/AAPT Joint Meeting, American Astronomical Society Meeting 209, #54.06; Bulletin of the American Astronomical Society, V

Astronomy and Astrophysics

Astronomy

Scientific paper

Deep multiwavelength surveys reveal that most Active Galactic Nuclei are obscured by moderate to high column densities of gas and dust, as suggested also by local AGN Unification and the spectral shape of the X-ray ``background.” This implies large numbers of hard X-ray sources that are missed by current, mid-range X-ray observations but will easily be found with EXIST. Incorporating the latest results on the luminosity and redshift dependence of the obscured fraction, we describe the expected 10-100 keV number counts of AGN and highlight the contributions that EXIST, as well as earlier missions like INTEGRAL, Swift, NuSTAR, and GLAST, will make to understanding cosmic black hole growth.
This work was supported by the Centro de Astrofisica FONDAP and NASA/INTEGRAL grant NNG05GM79G.

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