EU − B vs. EB − V, and EV − I vs. EB − V diagrams for stars with available spectral classification (see Table 5). Different colors indicate the newly identified A, B, and C stellar Populations (see Sect. 5.1). Solid lines are the normal relations ( and EB − V = 1.242EV − I), while the dotted line is a linear fit to to Population C (EB − V = 1.41EV − I).
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