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Table 3

Interstellar extinction derived for the stellar sample.

Star ID Spec. V (a) BV (a) E(BV) Refs.
type Galactic + SMC
AV 75 O5.5 I(f) 12.76 − 0.15 0.14 1, 2
AV 15 O6.5 I(f) 13.18 − 0.19 0.10 1, 2
AV 232 O7 Iaf 12.31 − 0.19 0.05 2, 4
AV 83 O7 Iaf 13.37 − 0.12 0.13 1
AV 327 O9.5 II-Ibw 13.09 − 0.16 0.06 1, 2
AV 77 O7 III 13.95 − 0.16 0.15 1, 2
AV 95 O7 III((f)) 13.83 − 0.19 0.04 1
AV 69 OC7.5 III((f)) 13.33 − 0.18 0.11 1, 2
AV 47 O8 III((f)) 13.50 − 0.18 0.05 1, 2
AV 307 O9 III 14.02 − 0.14 0.10 1
AV 439 O9.5 III 14.68 − 0.19 0.05 1, 2
AV 170 O9.7 III 14.11 − 0.29 0.06 1, 2
AV 43 B0.5 III 14.08 − 0.13 0.08 1, 3

Notes. (a) Photometry extracted from SIMBAD database, operated at CDS, Strasbourg, France. The colour excess, E(BV), is divided into two contributions from the Galactic foreground and the SMC field (see above). References.The sources for the photometry are 1. Bonanos et al. (2010), 2. Cutri et al. (2003), 3. Massey (2002), and 4. Evans et al. (2006).

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