The Serendipitous Extragalactic X-Ray Source Identification (SEXSI) Program

Details The Serendipitous Extragalactic X-Ray Source Identification (SEXSI) Program The Serendipitous Extragalactic X-Ray Source Identification (SEXSI) Program

Dec 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004aas...20515504e&link_type=abstract

American Astronomical Society Meeting 205, #155.04; Bulletin of the American Astronomical Society, Vol. 36, p.1607

Astronomy and Astrophysics

Astronomy

Scientific paper

The Serendipitous Extragalactic X-ray Source Identification (SEXSI) program has extended the sample of identified hard X-ray (2-10 keV) sources at intermediate fluxes to further our understanding of source populations contributing to the X-ray background. SEXSI, which studies over 1000 hard X-ray sources selected from more than 2 square degrees of archival Chandra data, provides an essential complement to the Chandra Deep Fields. In the flux range 10-13 to 3 x 10-15 erg cm-2 s-1 where the log N - log S relation changes slope and from which the bulk of the hard X-ray background arises, we have the largest sample of identified sources to date. We have obtained optical imaging for over 95% of our sample, and spectroscopic redshifts, primarily from Keck Observatory, for ˜ 450 hard X-ray sources from our sample. We discuss the results from our survey, including the spectroscopic properties of hard X-ray sources, the relationship between X-ray and optical properties of our sources, and our sample of spectroscopically-confirmed, narrow-lined, obscured type II quasars.

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