A Unique IR, SZE, and X-ray Galaxy Cluster Survey

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Scientific paper

We propose to image a single 12 square degree area with IRAC. The area is unique in that it is being imaged by three mm-wave experiments - SPT, ACT, and APEX - as they conduct Sunyaev-Zel'dovich Effect surveys for galaxy clusters. We have also begun to survey with XMM this same area to provide an X-ray selected galaxy cluster catalog. We have already obtained griz images of this area in an NOAO optical imaging survey to provide crucial photometric redshifts at z < 1. The proposed IRAC data will allow us to determine phot-z for the SZE cluster candidates up to at least z = 1.5, to uniformly select galaxies and AGN for carrying out clustering analyses, to estimate galaxy masses, and to cross check the SZE and X-ray cluster selection functions within the same area. Compared to other similar total areas surveyed by IRAC previously, our survey area has the distinct advantages of 1) being targetted by the new generation of mm-wave surveys, and 2) being the target of moderately deep XMM imaging.

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