Caltech Faint Field Galaxy Redshift Survey IX: Source Detection and Photometry in the Hubble Deep Field Region

Detection and photometry of sources in the Un, G, R, and Ks bands in a 9×9 arcmin region of the sky, centered on the Hubble Deep Field, are described. The data permit construction of complete photometric catalogs to roughly Un = 25, G = 26, R = 25.5 and Ks = 20 mag, and significant photometric measurements somewhat fainter. The galaxy number density is 1.3× 10 deg to R = 25.0 mag. Galaxy number counts have slopes d logN/dm = 0.42, 0.33, 0.27 and 0.31 in the Un, G, R and Ks bands, consistent with previous studies and the trend that fainter galaxies are, on average, bluer. Galaxy catalogs selected in the R and Ks bands are presented, containing 3607 and 488 sources, in field areas of 74.8 and 59.4 arcmin, to R = 25.5 and and Ks = 20 mag. Subject headings: cosmology: observations — galaxies: evolution — galaxies: fundamental parameters — galaxies: photometry 1 Based on observations made at the Palomar Observatory, which is owned and operated by the California Institute of Technology; and with the NASA/ESA Hubble Space Telescope, which is operated by AURA under NASA contract NAS 5-26555. 2 Theoretical Astrophysics, California Institute of Technology, mail code 130-33, Pasadena CA 91125, USA 3 Palomar Observatory, California Institute of Technology, mail code 105-24, Pasadena CA 91125, USA 4 Institute for Advanced Study, Olden Lane, Princeton NJ 08540, USA; [email protected] 5 Hubble Fellow 6 Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Mail Stop 20, Cambridge, MA 02139; [email protected] 7 Jet Propulsion Laboratory, Mail Stop 264-767, 4800 Oak Grove Drive, Pasadena CA 91109, USA 8 Infrared Processing and Analysis Center, California Institute of Technology, mail code IPAC 100-22, Pasadena CA 91125, USA