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Astron. Astrophys. 323, 387-392 (1997) AcknowledgementsWe thank our colleagues U. Mürset, H. Schild, H.M. Schmid, and W. Schmutz for helpful comments, and Drs. J. Krautter and H.M. Schmid for continuum fluxes observed by ORFEUS. This work has been supported by a grant from the Swiss National Science Foundation. ![]() ![]() ![]() ![]() © European Southern Observatory (ESO) 1997 Online publication: June 5, 1998 ![]() |