Astron. Astrophys. 344, 421-432 (1999)

Acknowledgements

We acknowledge financial support by the Spanish DGICYT, under the program PB93-0139. One of us, IM, acknowledges a grant from the Spanish Ministerio de Educación y Ciencia, EX94 08826734, and the hospitality of the Institut d'Astrophysique de Paris, where the writing of this paper was started. The Isaac Newton and Jacobus Kaptein Telescopes are operated on he island of La Palma by the Royal Greenwich Observatory in the Spanish Observatorio del Roque de los Muchachos of the Instituto de Astrofísica de Canarias. This research has made use of the NASA/IPAC EXTRAGALACTIC DATABASE (NED) which is operated by the Jet Propulsion Laboratory, Caltech, under contract with the National Aeronautics and Space Administration.

© European Southern Observatory (ESO) 1999

Online publication: March 18, 1999
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