Observations collected at ESO, La Silla, Chile, within the ON/ESO agreements.

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Tables 8-10 are only available in electronic form at http://www.aanda.org

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...

Present address: Universidade de São Paulo, IAG, Dpt. de Astronomia, Rua do Matão 1226, São Paulo-SP 05508-900, Brazil.

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... IRAF

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

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