... temperature

Figure 1 and Table 2 are only available in electronic form at http://www.aanda.org

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... group

http://www.mpa-garching.mpg.de/SDSS/

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... STARLIGHT

http://www.starlight.ufsc.br

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... IRAF

IRAF is distributed by the National Optical Astronomical Observatories, 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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