Research at Armagh Observatory is grant-aided by the Department of Education for Northern Ireland. We would like to thank the support staff of the WHT (La Palma) for their assistance during the observations. We also acknowledge the support provided by the STARLINK project funded by the UK PPARC. MTE was supported by a PPARC Research Studentship No. 9400747X during the period 1994-1997. MTE thanks all the staff in LAEFF for their kind support during the last steps of this work, particularly Dr. B. Montesinos for his help and careful reading of the manuscript.
© European Southern Observatory (ESO) 1999
Online publication: December 4, 1998