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Table 1

Observational information.

Star Sp.T.1 Instrument Date of observation

HD 104565 OC9.7 Iab FEROS 12 May 2008
HD 1522492 OC9 Iab ESPaDOnS 14 Jul. 2011
HD 152424 OC9.2 Ia FEROS 05 Apr. 2015
HD 154811 OC9.7 Ib FEROS average

Notes.

(1)

Spectral types are from Sota et al. (2011, 2014).

(2)

Star analyzed by Martins et al. (2015a).

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