... Corti

Fellow of CIC-BA, Argentina.

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... Niemela

Member of Carrera del Investigador Científico, CIC-BA, Argentina. Visiting Astronomer, CTIO, NOAO, operated by AURA, Inc., for NSF.

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... Morrell

Member of Carrera del Investigador Científico, CONICET, Argentina.

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... (CASLEO)

Operated under agreement between CONICET, SeCyT, and the Universities of La Plata, Córdoba and San Juan, Argentina.

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... IRAF

IRAF is distributed by NOAO, operated by AURA, Inc., under agreement with NSF.

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