Caltech Faint Galaxy Redshift Survey. IX. Source Detection and Photometry in the Hubble Deep Field Region
Steidel, Charles C.; Hogg, David W.; Neugebauer, Gerry; Cohen, Judith G.; Blandford, Roger; Pahre, Michael A.; Adelberger, Kurt L.; Jarrett, Thomas; Gautier, T. N.
United States
Abstract
Detection and photometry of sources in the Un, G, \Rscr, and Ks bands in a 9×9 arcmin2 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, \Rscr=25.5, Ks=20 mag and significant photometric measurements somewhat fainter. The galaxy number density is 1.3×105 deg-2 to \Rscr=25.0 mag. Galaxy number counts have slopes dlogN/dm=0.42, 0.33, 0.27, and 0.31 in the Un, G, \Rscr, and Ks bands, consistent with previous studies and the trend that fainter galaxies are, on average, bluer. Galaxy catalogs selected in the \Rscr and Ks bands are presented, containing 3607 and 488 sources in field areas of 74.8 and 59.4 arcmin2, to \Rscr=25.5 and Ks=20 mag.
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.