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Astron. Astrophys. 343, 367-372 (1999) AcknowledgementsI should like to thank Dr. L.-Å. Nyman at SEST for giving me extra observing time (during maintenance), so that the map could be finished in one observing session with exceptional submillimetre weather. I am also grateful for very useful discussions with Drs. P. Bergman and P.O. Lindblad. ![]() ![]() ![]() ![]() © European Southern Observatory (ESO) 1999 Online publication: March 1, 1999 ![]() |