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We have employed laser guide star (LGS) adaptive optics (AO) on the Keck IItelescope to obtain near-infrared (NIR) images in the Extended Groth Strip(EGS) deep galaxy survey field. This is a continuation of our Center forAdaptive Optics Treasury Survey (CATS) program of targeting 0.5<z<1 galaxieswhere existing images with the Hubble Space Telescope (HST) are already inhand. Our AO field has already been imaged by the Advanced Camera for Surveys(ACS) and the Near Infared Camera and Multiobject Spectrograph (NICMOS). Our AOimages at 2.2 microns (K') are comparable in depth to those from HST, haveStrehl ratios up to 0.4, and FWHM resolutions superior to that from NICMOS. Bysampling the field with the LGS at different positions, we obtain betterquality AO images than with an immovable natural guide star. As examples of thepower of adding LGS AO to HST data we study the optical to NIR colors and colorgradients of the bulge and disk of two galaxies in the field with z=0.7.

CATS: Optical to Near-Infrared Colors of the Bulge and Disk of Two z=0.7 Galaxies Using HST and Keck Laser Adaptive Optics Imaging