Astron. Astrophys. 347, L31-L34 (1999)

Acknowledgements

We whish to thank the referee, J. Greiner for his valuable comments and suggestions. We are also indebted to M. Tafalla for his valuable support at the 1.5-m OAN telescope. We are very grateful to Eliana Palazzi and Nicola Masseti for valuable information on the calibration stars. This work has been partially supported by Spanish CICYT grant ESP95-0389-C02-02.

© European Southern Observatory (ESO) 1999

Online publication: June 30, 1999
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