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The author presents the counts and multicolor distributions of nearly 10,000 field galaxies to B ≈ 24 in two regions of high galactic latitude, SA57 and SA68, that total 0.5 deg2. Photometry is derived from sky-limited UBVI photographic plates taken with the Mayall 4 m prime focus. Detailed assessment of the bandpasses, detection incompleteness and contamination, and random photometric errors is provided. These multicolor data can be used to estimate both redshift and intrinsic color of very faint field galaxies. Preliminary data analysis shows that the ultraviolet counts of galaxies from 20 to 22 mag rise rapidly with magnitude with a slope of 0.68, where 0.6 is Euclidian; further, galaxies fainter than B ≈ 20 exhibit progressively more of an ultraviolet excess (exceeding that of galactic subdwarfs) and thus an apparent shift to intrinsic colors that suggest the presence of extensive star formation. The data suggest the presence of large-scale structures that are possibly associated with two rich clusters at redshifts z of 0.24 and 0.54.
David C. Koo (Mon,) studied this question.