Fig. 6

Difference of the magnitude U of the Vilnius system and the magnitude u of the SDSS system as a function of the temperature-sensitive color Y–V. Luminosity class V stars are dots, class III – crosses and class I – circles. The reddening lines for the three spectral types, O8 V, A0 V and K5 III, are shown. The same designations are used in Figs. 7, 8 and 11–13.
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