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Astron. Astrophys. 345, 244-248 (1999) AcknowledgementsThis research has made use of the Simbad database, operated at CDS, Strasbourg, France. PN thanks the Swiss National Science Foundation for its support. and the ESO staff for his help both in Garching and at La Silla. ![]() ![]() ![]() ![]() © European Southern Observatory (ESO) 1999 Online publication: April 12, 1999 ![]() |