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Astron. Astrophys. 332, 721-731 (1998) AcknowledgementsWe thank Hugo Schwarz and Jean-François Claeskens for taking the observations. We also acknowledge useful criticism and suggestions by an anonymous referee. The work of RLMC has been supported by a grant of the DGYCIT PB94-1108.
© European Southern Observatory (ESO) 1998 Online publication: March 23, 1998 ![]() |