Computer Science
Scientific paper
Jun 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005sptz.prop20808s&link_type=abstract
Spitzer Proposal ID #20808
Computer Science
Scientific paper
We request 18.2 hours of IRAC and MIPS imaging to investige the mid-IR properties of spectroscopically-confirmed hard X-ray sources from five moderately-deep (50 - 200 ks) Chandra fields. These sources, identified in the SEXSI (Serendipitous Extragalactic X-ray Source Identification) survey, include (1) 14 X-ray luminous, narrow-lined quasars, typical of the class of object which dominates the X-ray background beyond 5 keV, and yet remained largely unidentified prior to the launch of Chandra and XMM-Newton; (2) 31 X-ray bright, optically-normal galaxies, sources which appear inactive at optical wavelengths but reveal the presence of an active nucleus at X-ray energies; and (3) 44 optically-faint X-ray sources which lack spectroscopic classification currently and are likely to be either high-redshift, or heavily-obscured. We will investigate the mid-IR properties of these obscured AGN, comparing them to a control sample of 25 broad-lined X-ray luminous AGN in the same fields. This survey will also allow investigation of the X-ray properties of mid-IR-selected AGN.
Eckart Megan
Harrison Fiona
Helfand David
Stern Daniel
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