...$\equiv$WR 25)

Based on observations collected at the European Southern Observatory (La Silla, Chile), at the Las Campanas Observatory, at the Cerro-Tololo Observatory (Chile) and at the CASLEO (El Leoncito, Argentina).

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...R. Gamen^1,

Visiting Astronomer, CASLEO, Argentina, and LCO, Chile.

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...2,

Research Associate FNRS (Belgium).

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...3,

Visiting Astronomer, CASLEO, Argentina, CTIO and LCO, Chile.

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...4,

Member of Carrera del Investigador, CIC-BA, Argentina. Visiting Astronomer, CASLEO, Argentina, and CTIO, Chile.

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...é^2,

Postdoctoral Researcher FNRS (Belgium).

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...á^1,

Member of Carrera del Investigador, CONICET, Argentina. Visiting Astronomer, CASLEO, Argentina, and LCO, Chile.

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...4,

Visiting Astronomer, CASLEO, Argentina.

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... (CASLEO

CASLEO is operated under agreement between CONICET, SECYT, and the National Universities of La Plata, Córdoba and San Juan, Argentina.

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... CTIO

CTIO is operated by the AURA Inc. under a cooperative agreement with the National Science Foundation as part of the NOAO.

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... version

Available upon request from ftp://lilen.fcaglp.unlp.edu.ar/pub/fede/gbart-0.1-41.tar.gz

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