Table 1
Overview of the sample stars and observing log.
ID# | Object | Common name | Sp.T.(a) | V(b) (mag) | B – V(b) (mag) | U – B(b) (mag) | Date YYYY-MM-DD | Texp s | S/N |
---|---|---|---|---|---|---|---|---|---|
ESPaDOnS R = 68 000 | |||||||||
1(c) | HD 66788 | O8 V | 9.454(10) | −0.077(14) | −0.931(19) | 2010-02-01 | 2400 | 180 | |
2 | HD 14633 | ON8.5 V | 7.459(12) | −0.204(13) | −1.050(28) | 2009-10-09 | 5200 | 430 | |
3(c) | HD 37061 | NU Ori | O9 V(d) | 6.830 | 0.23 | −0.59 | 2007-03-08 | 3 × 3200 | 700 |
4 | HD 258691 | O9 V | 9.700(0) | 0.570(0) | −0.453(15) | 2008-01-23 | 2 × 3440 | 200 | |
5 | HD 201345 | ON9.2 IV | 7.660 | −0.130 | −0.950 | 2010-07-26 | 2800 | 220 | |
6 | HD 57682 | O9.2 IV | 6.418(8) | −0.189(6) | −1.026(4) | 2009-05-04 | 2 × 2400 | 700 | |
7 | HD 227757 | O9.5 V | 9.217(13) | 0.186(13) | −0.744(5) | 2010-07-26 | 1160 | 90 | |
8 | BD −13 4930 | O9.5 V | 9.435(7) | 0.273(17) | −0.709(32) | 2010-06-25 | 3200 | 140 | |
9 | BD +60 499 | O9.5 V | 10.300(23) | 0.542(7) | −0.507(9) | 2008-08-19 | 3200 | 120 | |
10 | BD +57 247 | O9.5 IV(e) | 9.941(10) | 0.204(5) | −0.704(5) | 2014-02-13 | 6960 | 160 | |
11 | HD 207538 | O9.7 IV | 7.305(14) | 0.324(8) | −0.640(0) | 2008-07-30 | 4000 | 400 | |
FEROS R = 48 000 | |||||||||
12(c) | HD 46966 | O8.5 IV | 6.881(11) | −0.055(15) | −0.912(12) | 2006-01-03, 2006-01-05 | 2 × 600 | 550 | |
13 | HD 46202 | O9.2 V | 8.186(15) | 0.178(11) | −0.737(13) | 2008-04-16 to 19, 2008-04-26 | 6 × 720 | 400 | |
14 | HD 38666 | µ Col | O9.5 V | 5.169(4) | −0.281(6) | −1.077(64) | 2011-11-07 | 120 | 300 |
15(c) | HD 155889 | O9.5 IV | 6.551(9) | −0.016(8) | −0.881(13) | 2012-05-20 | 400 | 320 | |
16 | HD 54879 | O9.7 V(f) | 7.638(13) | −0.007(4) | −0.867(4) | 2012-05-19 | 600 | 260 | |
FOCES R=40000 | |||||||||
17 | HD 214680 | 10 Lac | O9 V | 4.879(14) | −0.201(8) | −1.036(10) | 2005-09-21 | 6 × 600 | 400 |
18 | HD 34078 | AE Aur | O9.5 V | 5.956(15) | 0.225(5) | −0.704(15) | 2005-09-21 | 2 × 540, 3 × 450 | 250 |
19 | HD 206183 | O9.5 V | 7.419(11) | 0.126(12) | −0.787(5) | 2005-09-27 | 2700 | 200 | |
20 | HD 36512 | υ Ori | O9.7 V | 4.618(13) | −0.264(7) | −1.068(8) | 2005-09-28 | 2 × 360 | 300 |
Notes. (a)Spectral types for most objects were adopted from Martins et al. (2015a), which are mostly based on the work of Sota et al. (2011, 2014). (b)Mermilliod (1997), Morel & Magnenat (1978). (c)These stars show spectroscopic binarity or multiplicity and are excluded from the detailed analyses.(d)Bragança et al. (2012). (e)Hoag & Applequist (1965). (f)Sota et al. (2011).
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