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Gravities for stars are derived from their spectral type and luminosity class. Calibrations are stored in files spec_logg.V, spec_logg.IV, spec_logg.III, spec_logg.II, spec_logg.I in oyster/starbase.

logg_stars Compute log(g) for all stars in startable.

Function. Return log(g) for star with specified spectrum.

Christian Hummel 2017-06-29