![]() | ![]() |
Astron. Astrophys. 363, 995-1004 (2000) AcknowledgementsI dedicate this paper to the memory of my friend and colleague Tashko Valchev who not only participated in the observations and did an enormous amount of work on the reduction of the data but also developed all program modules used in the present study. I would like to thank the referee Dr. D.R. Gies for a careful reviewing of the manuscript and valuable comments. This work was supported by NSF to Ministry of Education and Sciences trough grant No. F-813/1998.
© European Southern Observatory (ESO) 2000 Online publication: December 5, 2000 ![]() |