The IRAC Shallow Survey

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Scientific paper

The Spitzer Infrared Array Camera (IRAC) shallow survey covers 8.5 square degrees in the NDWFS Bootes field with 3 or more 30 second exposures per position. The survey reaches 5 sigma limits of 6.4, 8.8, 51, and 50 microJy at 3.6, 4.5, 5.8, and 8 microns respectively. The availability of deep optical imaging and extensive spectroscopy for the field have enabled reliable photometric redshifts to be fit to a 4.5 micron selected sample. The photometric redshifts have been used to find almost 300 galaxy clusters and groups, 93 of which are beyond redshift one (eight of which have been spectroscopically confirmed). Other results include an IRAC color selection technique for identifying AGN, the identification of quasars with redshifts up to 6.1, and the identification of the first isolated brown dwarf discovered by Spitzer.

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