Extragalactic Hard X-ray Surveys: From INTEGRAL to Simbol-X

Details Extragalactic Hard X-ray Surveys: From INTEGRAL to Simbol-X Extragalactic Hard X-ray Surveys: From INTEGRAL to Simbol-X

2009-02-25

arxiv.org/abs/0902.4319v2

AIP Conf.Proc.1126:108-111,2009

Astronomy and Astrophysics

Astrophysics

Galaxy Astrophysics

Proceedings of the 2nd Simbol-X symposium: "Simbol-X - Focusing on the Hard X-ray Universe", AIP Conf. Proc. Series, 4 pages.

Scientific paper

10.1063/1.3149389

We present some results of the deepest extragalactic survey performed by the INTEGRAL satellite. The fraction of very absorbed AGN is quite large. The sharp decrease in the absorption fraction with X-ray luminosity observed at lower-energy X-rays is not observed. The current lack of truly Compton-thick objects, with an upper limit of 14% to the size of this population, is just compatible with recent modeling of the cosmic X-ray background. We also study the prospects for a future hard X-ray serendipitous survey with Simbol-X. We show that Simbol-X will easily detect a large number of serendipitous AGN, allowing us to study the evolution of AGN up to redshifts about 2, opening the door to the cosmological study of hard X-ray selected AGN, which is barely possible with existing satellites like Swift and INTEGRAL.

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