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Table 1:

Calibration used for the classification of the star1.
ST Mv Range ST Mv Range
Hot O <-6.0 B6 [-0.6; -0.25[
O3 [-6.0; -5.9[ B7 [-0.25; 0.025[
O4 [-5.9; -5.7[ B8 [0.025; 0.285[
O5 [-5.7; -5.5[ B9 [0.285; 0.43]
O6 [-5.5; -5.2[ A0 ]0.43; 1.0[
O7 [-5.2; -4.9[ A1 [1.0; 1.3[
O8 [-4.9; -4.5[ A2 [1.3; 1.5[
O9 [-4.5; -4.2[ A3-A4 [1.5; 1.95[
B0 [-4.2; -3.25[ A5-A6 [1.95; 2.2[
B1 [-3.25; -2.55[ A7 [2.2; 2.4[
B2 [-2.55; -1.8[ A8-A9 [2.4; 2.55[
B3 [-1.8; -1.4[ F0-F1 [2.55; 3.6[
B4 [-1.4; -0.95[ cool F $\ge$3.6
B5 [-0.95; -0.6[    

1 The classification is based on ranges in absolute V magnitude per spectral sub-type, following the calibration of Lang (1992) and Wisniewski & Bjorkman (2006, and references therein) for main-sequence stars.


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