NOAO >   Observing Info >   Approved Programs >   2013A-0265

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Proposal Information for 2013A-0265


PI: Xinyu Dai, University of Oklahoma, xdai@ou.edu
Address: Physics Department, 440 West Brooks Street, Norman, OK 73019, USA

CoI: Rhiannon Griffin, University of Oklahoma
CoI: Chris S. Kochanek, Ohio State University
CoI: Joel N. Bregman, University of Michigan

Title: Optical Confirmation of Cluster Candidates from the Swift Serendipitous Cluster Survey

Abstract: The Swift-XRT observations of gamma-ray bursts form an excellent serendipitous, medium-deep, soft X-ray survey, covering a sky area of 75 square degrees with a median flux limit of 4\times10^-15\flux. Potentially, the final survey will yield one of the largest X-ray selected cluster catalogs with ~1,200 clusters. For those that fall in the SDSS regions, we have confirmed that about 50% of the candidates are low redshift clusters (z < 0.5). We have on-going programs for deeper follow-up observations using the 2.4m MDM telescope to confirm the higher redshift candidates in SDSS regions up to z=0.8. In this proposal, we propose to follow-up the Swift cluster candidates that are located outside of the SDSS fields using the KPNO 4m telescope. In particular, we propose to take deep g, r, and i images using MOSAIC. This is important to constrain the completeness and purity of the catalog, model the cluster selection function of the survey, and build the largest statistical sample of X-ray selected cluster catalog to study structure formation and cosmology.


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



NOAO >   Observing Info >   Approved Programs >   2013A-0265

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