Astron. Astrophys. 343, 841-846 (1999)

Acknowledgements

One of us, RLMC, thanks the Observatory of La Plata for the hospitality during October of 1998, when most of this work was done. The work of RLMC has been supported by a grant of the Spanish DGES PB97-1435-C02-01. We thank Drs. Stewart Eyres and Mike Hollis for their revision of Tables 3 and 4.

© European Southern Observatory (ESO) 1999

Online publication: March 1, 1999
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