NOAO >   Observing Info >   Approved Programs >   2006B-0125

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Proposal Information for 2006B-0125


PI: Wayne Barkhouse, University of Illinois, wbark@astro.uiuc.edu
Address: Department of Astronomy, 1002 West Green Street, Urbana, IL 61801, USA

CoI: Paul Green, Harvard-Smithsonian, CfA

Title: Unveiling Optical Counterparts to Chandra X-ray Cluster Candidates

Abstract: We propose to use the KPNO 2.1meter telescope to observe optical counterparts of 16 X-ray cluster candidates detected serendipitously in \it Chandra fields that lack deep optical coverage. Our deep r^\prime-, i^\prime-, and z^\prime-band imaging will allow us to determine the nature of the extended X-ray sources and measure cluster redshifts to z~ 1.1 using the location of the early-type cluster galaxy red-sequence in the color-magnitude plane. In addition, we will measure the cluster luminosity function, optical richness, color- magnitude relation, and correlations between optical and X-ray properties. By contrasting cluster attributes we will increase our understanding of cluster evolution over a large range in redshift.


National Optical Astronomy Observatory, 950 North Cherry Avenue, P.O. Box 26732, Tucson, Arizona 85726, Phone: (520) 318-8000, Fax: (520) 318-8360



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