... IRAF

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

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... survey

http://thales.astro.rug.nl/$\sim$whisp/Database/

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... dispersion

Turbulent velocity dispersion is defined as the line broadening obtained after subtracting instrumental and thermal broadening.

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