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P.J. Green, T.L. Aldcroft, W.A. Barkhouse, R.A. Cameron, D.-W. Kim, M. Kim, A.E. Mossman, J.D. Silverman, B.J. Wilkes, A. Vikhlinin (SAO), Z. Ivezic (Princeton University), ChaMP Collaboration
In the optical a large population of AGN has been missed that is crucial (1) for an unbiased census of accreting supermassive black holes, (2) for understanding their evolution in the context of star- and bulge formation, and (3) to explain the spectral shape of the Cosmic X-ray Background. The Chandra Multiwavelength Project (ChaMP) is a serendipitous survey of the X-ray sky which covers about 14 sq.deg. of sky in the X-ray flux range of -13 to -16 (log 2-10 keV flux, cgs) and includes about 8000 X-ray sources, with markedly decreased bias against absorption. ChaMP optical followup has now classified hundreds of these sources out to z>4. We discuss new results on the high-z X-ray luminosity function and contrast to the evolution of optical quasars. The sample is complemented by X-ray spectral fitting that also measures the evolution of intrinsic absorption with L and z. Finally, we describe our double-pronged optical/X-ray galaxy cluster detection methods and early results.
We gratefully acknowledge the financial support of NASA grant: AR4-5017X (Chandra).
If you would like more information about this abstract, please follow the link to http://hea-www.harvard.edu/CHAMP/. This link was provided by the author. When you follow it, you will leave the Web site for this meeting; to return, you should use the Back comand on your browser.
The author(s) of this abstract have provided an email address for comments about the abstract: pgreen@cfa.harvard.edu
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Bulletin of the American Astronomical Society, 36 #2
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