Photometric zero-point stars in Magellanic cloud clusters

Photoelectric UBV measurements of faint stars in the Magellanic Cloud clusters NGC 339, NGC 458, NGC 2004, and NGC 2164, obtained with the 1.5-m Cerro Tololo Inter-American Observatory in 1972 and 1973, are presented. The present as-yet unpublished sample of stars range in V brightness from 15.2 to 18.0, and in (B-V) color from -0.20 to + 1.82. The data provide zero-point standards for use both in these clusters and in other clusters in the Magellanic Clouds.