American Astronomical Society, Astrophysical Journal Supplement, 1(127), p. 1-9, 2000
DOI: 10.1086/313318
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Detection and photometry of sources in the Un, G, , 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, = 25.5, Ks = 20 mag and significant photometric measurements somewhat fainter. The galaxy number density is 1.3 × 105 deg-2 to = 25.0 mag. Galaxy number counts have slopes d log N/dm = 0.42, 0.33, 0.27, and 0.31 in the Un, G, , and Ks bands, consistent with previous studies and the trend that fainter galaxies are, on average, bluer. Galaxy catalogs selected in the and Ks bands are presented, containing 3607 and 488 sources in field areas of 74.8 and 59.4 arcmin2, to = 25.5 and Ks = 20 mag.