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Astron. Astrophys. 348, L33-L36 (1999) AcknowledgementsRené Oudmaijer, Phil James and the referee, Xavier Luri, are warmly thanked for valuable comments and suggestions which improved the presentation of the paper. This research has made use of the SIMBAD database, operated at CDS, Strasbourg, France. ![]() ![]() ![]() ![]() © European Southern Observatory (ESO) 1999 Online publication: July 26, 1999 ![]() |