Comparing the emission from an unbiased AGN sample with the X-ray background

Details Comparing the emission from an unbiased AGN sample with the X-ray background Comparing the emission from an unbiased AGN sample with the X-ray background

Sep 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007cxo..prop.2457w&link_type=abstract

Chandra Proposal ID #09900262

Computer Science

Chandra Proposal Id #09900262

Scientific paper

Although the populations which make up the medium X-ray background are now well understood, little is known at higher energies. The XRB peaks in the middle of the imaging band of INTEGRAL/IBIS, with which we have made the deepest extragalactic hard X-ray survey, reaching 0.5 mCrab. We detect 42 sources, including 24 well known AGN, 7 unidentified sources and 9 with counterparts of unknown X-ray character. Here we request observations to obtain arcsec positions and measure the medium X-ray spectra of the latter 16 sources. The resulting complete sample will allow to study how the medium and hard XRB differ, test population synthesis models for the XRB, including the prevalence of highly absorbed and Compton-thick sources, and begin a study of the evolution of these populations.

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