Based on observations collected with the Jacobus Kaptein Telescope, (owned and operated jointly by the Particle Physics and Astronomy Research Council of the UK, The Nederlandse Organisatie voor Wetenschappelijk Onderzoek of The Netherlands and the Instituto de Astrofísica de Canarias of Spain and located in the Spanish Observatorio del Roque de Los Muchachos on La Palma which is operated by the Instituto de Astrofísica de Canarias), the 2.3 m telescope of the Australian National University at Siding Spring, Australia, and the VLT-UT1 Antu Telescope (ESO).

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Tables 1 to 6 and A.3 to A.7 are only available in electronic form at http://www.edpsciences.org. The Stellar Library STELIB library is also available at the CDS, via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via http://cdsweb.u-strasbg.fr/cgi-bin/qcat?J/A+A/402/433

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... iraf

IRAF is distributed by the National Optical Astronomy Observatories, USA, which are operated by the Association of Universities for Research in Astronomy, Inc., under cooperative agreement with the National Science Foundation, USA.

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