![]() | ![]() |
Astron. Astrophys. 336, 518-526 (1998) AcknowledgementsWe are grateful to L.A. Balona and E. Poretti for their useful suggestions, thanks are due to Dr. Balona also for allowing us to use his LNPROF code.
© European Southern Observatory (ESO) 1998 Online publication: July 20, 1998 ![]() |