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Astron. Astrophys. 355, 759-768 (2000) AcknowledgementsWe thank Andy Skumanich and Bruce Lites for kindly providing the ASP Stokes data. D. Rees gratefully acknowledges financial support from the CNRS and an ARC Australia-France Special Research Initiative Grant from the University of Sidney. ![]() ![]() ![]() ![]() © European Southern Observatory (ESO) 2000 Online publication: March 9, 2000 ![]() |