Astron. Astrophys. 347, 550-555 (1999)

Acknowledgements

The authors are thankfull to Rumen S. Bachev for carrying out some of the photometric observations and to Dr. D. Kolev for his help in obtaining the spectral data. The constructive comments from an anonymous referee are highly appreciated. The research was partially supported by the Bulgarian National Science Foundation under contracts F-347/93 and F-716/97. J.R. De Medeiros and J.R.P. Da Silva acknowledge partial financial support from the CNPq Brazilian Agency. We have made use of the Simbad database, operated at the CDS, Strasbourg, France, and the Hipparcos Catalogue.

© European Southern Observatory (ESO) 1999

Online publication: June 30, 1999
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