Integrated photometry and light distribution of 21 Southern-Hemisphere galactic globular clusters

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Astronomical Photometry, Brightness Distribution, Globular Clusters, Milky Way Galaxy, Color, Magnitude, Southern Hemisphere

Scientific paper

Total magnitudes and brightness distributions were determined by computer analysis of multiaperture observations of 21 galactic globular clusters made in 1960-1961 at the Mount Stromlo Observatory. The results were compared with the Kron and Mayall (1960) data. In addition, total magnitudes of seven NGC clusters determined by several other investigators using multiaperture observations were compared in order to estimate the accuracy obtainable in these determinations. Comparison of the present (B-V) results on the 21 clusters with the (V-I) measures of the Kron and Mayall PVI system showed no significant differences in colors measured through different apertures on the same night, although night-to-night differences were considerable.

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