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Astron. Astrophys. 336, 637-647 (1998) AcknowledgementsWe thank the night assistants in Chile and Garching for their fine support for the CAT observations, and the variable star section of the Royal Astronomical Society of New Zealand for providing us with their visual magnitudes. We also wish to thank Dr Janet Mattei for making available Mayall's original photometric data. We are indebted to Hilmar Duerbeck for providing observations in digital form. It is a pleasure to thank Orsola De Marco, Martine Mouchet and Frank Verbunt for fruitful discussions. TD acknowledges financial support by the Swiss National Science Foundation. HMS is supported by the Deutsche Forschungsgemeinschaft (KR 1053/6-1). ![]() ![]() ![]() ![]() © European Southern Observatory (ESO) 1998 Online publication: July 20, 1998 ![]() |