Based on data collected at the European Southern Observatory, La Silla, Chile.

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Tables 1, 3, 4 and 5 and the complete data set are only available in electronic form 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/384/491

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