Astron. Astrophys. 363, 601-604 (2000)

Acknowledgements

This work was done in part during TA's sabbatical leave. TA would like to thank Osservatorio Astronomico di Brera for the very kind hospitality during his stay. All calculations were carried out by Dec Alpha machines on the network in the Observatory.

© European Southern Observatory (ESO) 2000

Online publication: December 11, 2000
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