Based on observations collected at the European Southern Observatory, Paranal, Chile, within the Observing Programmes 63.N-0229 and 65.N-0164, and in part on observations collected by the NASA/ESA Hubble Space Telescope, which is operated by AURA, Inc., under NASA contract NAS5-26555.

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

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... Web

http://www.obs-besancon.fr/www/modele/modele_ang.html

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... atmospheres

http://cfaku5.harvard.edu/grids.html

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