NCH and WRJR acknowledge continuing financial support from the UK PPARC, RAS acknowledges support from the ST ScI Director's Discretionary Research Fund, and FPK acknowledges support from the Royal Society. The William Herschel and Jacobus Kapteyn Telescopes on the island of La Palma are operated by the Royal Greenwich Observatory, on behalf of the UK PPARC, at the Spanish Observatorio del Roque de los Muchachos of the Instituto de Astrofisica de Canarias. This research has made use of the SIMBAD database operated at the CDS, Strasbourg, France.
© European Southern Observatory (ESO) 1999
Online publication: June 18, 1999