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Astron. Astrophys. 336, L25-L28 (1998) AcknowledgementsWe thank Dr. Gregory W. Henry for the compilation of the photometric observations and Dr. Sami K. Solanki and Dr. Rudolf Duemmler for discussions. We thank our referee Dr. Klaus G. Strassmeier for useful remarks helping to improve the paper.
© European Southern Observatory (ESO) 1998 Online publication: July 20, 1998 ![]() |