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Astron. Astrophys. 334, 935-942 (1998) AcknowledgementsWe wish to thank the SEST staff for their skillful and enthusiastic support during the observations. This research has been supported by the Swedish Natural Science Research Council (NFR) and benefited from a grant by the Anna-Greta och Holger Crafoord Foundation. ![]() ![]() ![]() ![]() © European Southern Observatory (ESO) 1998 Online publication: June 2, 1998 ![]() |