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G. P. Tiede (UF), A. Dey, B. T. Jannuzi, M. J. I. Brown (NOAO), E. Ryan (UA), J. R. Najita (NOAO), NDWFS Team
We present NOAO Deep Wide-Field Survey infrared K-band observations of a region in the Boötes field. The K-band observations reach a depth of 19.5 mag and cover the same area on the sky as the first-release optical data. The joint optical/IR dataset now provide four-color (BWRIK) coverage of approximately 1 square degree in the Boötes field. The addition of K data allows for good color-based galaxy/star separation (using BWRIK color-color diagrams), improved galactic types and photometric redshifts, and the selection of AGN. The combination of color-color and color-magnitude diagrams allows the investigation of the properties of various populations in the field: populations of halo giants and dwarfs, local brown dwarfs, and galaxies out to redshifts ~1.