Abstract

This paper presents a color magnitude diagram for the enigmatic cluster ω Centauri (NGC 5139 = C1328 - 472) tracing the main sequence down to V ∼ 21.5. The spread in color on the upper main sequence is confirmed as intrinsic to the cluster. The CCD observations were made using the SAAO 1 m telescope with the UCL CCD camera and the RGO CCD camera at the prime focus of the AAT.

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