Difference between spectroscopic and dereddened of candidates according to the extinction models by SFD-B (top panel) and A&L (bottom panel). The stars with no significant differences are represented by crosses, and the others by the same symbols as in Fig. 6. As a reference, temperature differences from undereddened colours are indicated by blue symbols, i.e. the same values as in Fig. 6. In both plots, the dotted lines at approximately − 50 K represent the average − of the stars represented by the crosses.