Astron. Astrophys. 356, 603-611 (2000)

Acknowledgements

This research was supported by MTA-CSIC Joint Project No.15/1998, Hungarian OTKA Grants #F022249, #T022259, #T032258, Pro Renovanda Cultura Hungariae Foundation Grant DT 1999 ápr./36. and Szeged Observatory Foundation. LLK wishes to express his thanks to the staff of the DDO for granting the necessary observing time. Also, LLK and BCS acknowledge the helpful assistance by É. Barát and B. Gere during the observations. Fruitful discussions with K. Szatmáry are also gratefully acknowledged. Thanks are due to the referee, Prof. S. Rucinski, whose criticism and many suggestions led to significant improvement of the paper. The NASA ADS Abstract Service was used to access data and references.

© European Southern Observatory (ESO) 2000

Online publication: April 10, 2000
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