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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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