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Table 2

List of detected early-type stars.

ID Coordinates Spectral detection (J − Ks)o (H − Ks)o Comment
RA(J2000) Dec(J2000) Instr. Spectrum T eff
[hh mm ss] [deg mm ss] [K]
1 18 33 18.14 −09 24 09.9 SofI OBe 24 300 ± 8800 –0.12 –0.06
2 18 33 52.19 −09 10 38.2 SofI O9-9.5e 29 300 ± 1800 –0.16 –0.07 BD−094766
3 18 34 00.86 −09 15 41.5 SINFONI O6-7fK+ 35 700 ± 1000 –0.21 –0.10
4 18 34 05.74 −09 16 00.6 SINFONI O7-8.5fK+ 31 800 ± 1500 –0.21 –0.10
5 18 34 06.25 −09 15 17.9 SINFONI O6-7fK+ 35 700 ± 1000 –0.21 –0.10
6 18 34 08.75 −09 13 59.9 SINFONI B0-3 23 800 ± 6700 –0.16 –0.08
7 18 34 09.25 −09 03 06.0 SINFONI B4-A2 12 700 ± 3600 –0.02 0.00
8 18 34 10.50 −09 14 04.4 SINFONI B0-3 23 800 ± 6700 –0.16 –0.08
9 18 34 10.59 −09 13 43.9 SINFONI O7-8.5fK+ 33 100 ± 1500 –0.21 –0.10
10 18 34 10.70 −09 13 58.7 SINFONI OF – –0.06 –0.01
11 18 34 11.30 −09 13 56.4 SINFONI OF – –0.06 –0.01
12 18 34 11.81 −08 55 44.9 SINFONI B4-A2 12 700 ± 3600 –0.02 0.00
13 18 34 12.14 −09 00 23.6 SINFONI B4-A2 12 700 ± 3600 –0.02 0.00
14 18 34 12.17 −09 12 29.9 SINFONI O6-7fK+ 34 500 ± 1200 –0.21 –0.10
15 18 34 13.47 −09 14 31.9 SINFONI O6-7fK+ 34 500 ± 1200 –0.21 –0.10
16 18 34 14.47 −08 44 22.9 SINFONI O9-9.5e 29 300 ± 1800 –0.16 –0.07
17 18 34 15.88 −08 45 45.2 SINFONI O9-9.5fK+ 31 400 ± 1100 –0.19 –0.09
18 18 34 17.26 −08 46 50.0 SINFONI O6-7fK+ 34 500 ± 1200 –0.21 –0.10
19 18 34 18.14 −08 57 18.4 SINFONI B4-A2 12 700 ± 3600 –0.02 0.00
20 18 34 18.85 −08 45 32.9 SINFONI B4-A2 12 700 ± 3600 –0.02 0.00
21 18 34 19.19 −08 46 17.6 SINFONI B7.5-A2 12 900 ± 3900 –0.02 0.00
22 18 34 21.70 −08 28 20.9 SofI cLBV 13 200 ± 2300 0.01 –0.01
23 18 34 23.79 −08 49 18.1 SINFONI O6-7fK+ 35 700 ± 1000 –0.21 –0.10
24 18 34 26.38 −09 00 49.1 SINFONI OF – –0.06 –0.01
25 18 34 27.67 −09 15 51.1 SINFONI O4fK+ 38 200 ± 2500 –0.21 –0.10
26 18 34 28.48 −08 59 31.1 SINFONI B4-A2 12 700 ± 3600 –0.02 0.00
27 18 34 30.15 −08 44 40.6 SINFONI OF – –0.06 –0.01
28 18 34 30.84 −08 58 40.1 SINFONI B4-A2 12 700 ± 3600 –0.02 0.00
29 18 34 30.95 −08 58 37.8 SINFONI OF – –0.06 –0.01
30 18 34 33.83 −08 32 57.9 SINFONI OF – –0.06 –0.01
31 18 34 33.92 −08 32 59.6 SINFONI B0-3 23 800 ± 6700 –0.16 –0.08
32 18 34 35.17 −09 00 39.9 SINFONI B4-A2 12 700 ± 3600 –0.02 0.00
33 18 34 35.74 −09 01 27.6 SINFONI OF – –0.06 –0.01
34 18 34 36.94 −08 47 54.7 SINFONI OF – –0.06 –0.01
35 18 34 38.36 −08 50 49.7 SINFONI OF – –0.06 –0.01
36 18 34 42.63 −08 45 01.9 SINFONI O6-7fK+ 34 500 ± 1200 –0.21 –0.10
37 18 34 42.86 −08 45 02.9 SINFONI OF – –0.06 –0.01
38 18 34 50.71 −08 46 16.0 SINFONI B0-3 23 800 ± 6700 –0.16 –0.08
[MFD2010] 3 18 34 08.68 −09 14 11.1 B0-3 21 500 ± 6000 –0.08 –0.04 [MFD2010] 3a
[MFD2010] 4 18 34 08.54 −09 14 11.8 B0-3 21 500 ± 6000 –0.08 –0.04 [MFD2010] 4a
[MVM2011] 39 18 33 47.64 −09 23 07.7 WC8 65 000 ± 5000 0.43 0.38 [MVM2011] 39b

Notes. Identification numbers are followed by celestial coordinates, instrument, spectral types, estimated effective temperatures, Teff , intrinsic near-infrared colors, and comments. Two B supergiants detected by Messineo et al. (2010), and a WR discovered by Mauerhan et al. (2011) are appended to the table. We used the collection of infrared colors and temperatures per spectral types as listed in the Appendix of Messineo et al. (2011). For every star (for example a O6-7 star), we assumed the mean temperature of the range considered, and as error half range.

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