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Get absolute magnitudes

Absolute magnitudes are derived from the spectral type or trigonometric parallax. For dwarfs, it can also be computed from the $(B-V)$ color index. Files containing stellar parameter data reside in oyster/starbase. Extensive photometric data is found in files spec_par.X, where X signifies the luminosity classes for dwarfs, giants, and supergiants, V, III, Iab, respectively. For subgiants, brightgiants, and the subclasses of the supergiants, limited data is in files spec_MV.IV, spec_MV.II, spec_MV.Ia, spec_MV.Iab, spec_MV.Ib.

pmv_dwarfsDwarfs only; reads BV_MV.dwarfs.
pmv_stars All spectral types.
tmv_stars Use trigonometric parallax.

Christian Hummel 2009-10-20