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Astron. Astrophys. 358, 514-520 (2000) AcknowledgementsThis article benefited from the suggestions and encouraging comments of the referee, James Lequeux. We are also grateful to Rodrigo Soto and Mark Seaborne for helpful discussions. The staff at the SEST and OSO telescopes kindly assisted us within the course of the observations. The Swedish-ESO Submillimetre Telescope is operated jointly by ESO and the Swedish National Facility for Radioastronomy, Onsala Space Observatory, at Chalmers University of Technology. The Onsala 20m telescope is operated by the Swedish National Facility for Radioastronomy, Onsala Space Observatory, at Chalmers University of Technology. S.C. acknowledges support from Fundación Andes and PPARC through a Gemini studentship. L.B., S.C., and J.M. acknowledge support from FONDECYT-Chile grant 8970017, and from a Cátedra Presidencial en Ciencias 1997. ![]() ![]() ![]() ![]() © European Southern Observatory (ESO) 2000 Online publication: June 8, 2000 ![]() |