(B − V,V − I) color–color diagram of the observed sample. Symbols as in Figs. 5 and 10. The thick red line indicates the unreddened locus of stars earlier than A0, while the thick gray line indicates the same for later type stars. The reddening law appropriate for cluster stars is illustrated by the solid arrow on top of the dashed arrow describing foreground absorption (and reddening law). The length of the solid arrow indicates the reddening of the new candidate O star 2MASS10453674-5947020 (star [S87b] IRS 42 in SIMBAD).
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