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Table 2
Log of the FORS2 observations conducted in April 2013 and February 2014.
| Star | RA | Dec | Sp. | V | MJD | Airmass | Exp. time | S/N at |
| name | type | [mag] | [s] | 4950 Å | ||||
|
|
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| HD 37020 | 05:35:15.82 | −05:23:14.4 | B0.5V | 6.73 | 56 695.00802 | 1.09 | 10 × 26.3 | 2690 |
| HD 42088 | 06:09:39.57 | +20:29:15.5 | O6V | 7.55 | 56 696.01523 | 1.52 | 8 × 49.4 | 2371 |
| HD 44597 | 06:23:28.54 | +20:23:31.7 | O9V | 9.05 | 56 695.02714 | 1.52 | 10 × 165.0 | 2469 |
| HD 44597 | 56 697.01026 | 1.57 | 8 × 201.2 | 2214 | ||||
| HD 44811 | 06:24:38.35 | +19:42:15.8 | O7V | 8.44 | 56 695.06127 | 1.41 | 10 × 90.9 | 2570 |
| HD 44811 | 56 697.04296 | 1.43 | 8 × 120.0 | 2503 | ||||
| HD 46056 | 06:31:20.87 | +04:50:03.3 | O8V | 8.16 | 56 696.10906 | 1.16 | 8 × 59.4 | 2262 |
| HD 259012 | 06:31:33.47 | +04:50:39.7 | B1Vn | 9.38 | 56 696.08050 | 1.15 | 8 × 166.2 | 2219 |
| HD 259012 | 56 697.18070 | 1.43 | 8 × 180.0 | 2246 | ||||
| HD 46106 | 06:31:38.40 | +05:01:36.4 | O9.7III | 7.93 | 56 696.15970 | 1.30 | 10 × 48.0 | 2586 |
| HD 46328 | 06:31:51.37 | −23:25:06.3 | B0.7IV | 4.33 | 56 390.01868 | 1.17 | 6 × 3.0 | 2469 |
| HD 46328 | 56 390.98926 | 1.09 | 10 × 2.2 | 3151 | ||||
| HD 46328 | 56 391.98301 | 1.08 | 8 × 1.5 | 2541 | ||||
| HD 259105 | 06:31:52.00 | +04:55:57.3 | B1V | 9.38 | 56 696.04939 | 1.18 | 8 × 197.5 | 2351 |
| HD 259105 | 56 697.14766 | 1.26 | 8 × 202.5 | 2341 | ||||
| HD 46149 | 06:31:52.53 | +05:01:59.2 | O8.5V((f)) | 7.61 | 56 696.17981 | 1.40 | 8 × 46.3 | 2381 |
| HD 46150 | 06:31:55.52 | +04:56:34.3 | O5V((f)) | 6.73 | 56 696.20165 | 1.57 | 10 × 16.5 | 2402 |
| HD 46223 | 06:32:09.31 | +04:49:24.7 | O4V((f)) | 7.28 | 56 696.03492 | 1.21 | 8 × 25.0 | 2178 |
| HD 46202 | 06:32:10.47 | +04:57:59.8 | O9V((f)) | 8.19 | 56 389.96740 | 1.20 | 8 × 127.5 | 2831 |
| HD 46202 | 56 390.96909 | 1.21 | 8 × 90.0 | 2954 | ||||
| HD 46202 | 56 391.96695 | 1.21 | 8 × 60.0 | 2667 | ||||
| HD 46966 | 06:36:25.89 | +06:04:59.5 | O8V | 6.87 | 56 696.21652 | 1.73 | 8 × 15.0 | 2044 |
| HD 48279A C | 06:42:40.45 | +01:42:02.6 | F3IV/V | 8.91 | 56 696.12995 | 1.15 | 10 × 145.5 | 2632 |
| HD 48279A A | 06:42:40.55 | +01:42:58.3 | O8.5V | 7.96 | 56 695.08564 | 1.12 | 10 × 45.5 | 2438 |
| HD 48279A A | 56 697.06710 | 1.13 | 8 × 101.2 | 2696 | ||||
| HD 48279A B | 06:42:41.47 | +01:42:25.4 | F2V | 12.40 | 56 695.11312 | 1.12 | 6 × 236.7 | 1129 |
| HD 289002 | 06:45:13.37 | +02:08:14.7 | B1 | 10.44 | 56 695.14829 | 1.18 | 8 × 300.0 | 1538 |
| HD 289002 | 56 697.09175 | 1.12 | 10 × 313.6 | 1903 | ||||
| HD 54879 | 07:10:08.15 | −11:48:09.8 | O9.7V | 7.65 | 56 696.22992 | 1.36 | 10 × 35.5 | 2359 |
| HD 54879 | 56 697.21206 | 1.26 | 10 × 30.5 | 2398 | ||||
| HD 60848 | 07:37:05.73 | +16:54:15.3 | O8:V: | 6.87 | 56 389.99168 | 1.35 | 8 × 83.7 | 3822 |
| HD 60848 | 56 391.00382 | 1.38 | 8 × 30.0 | 3026 | ||||
| HD 64365 | 07:51:40.36 | −42:53:17.5 | B2IV | 6.03 | 56 390.03983 | 1.11 | 6 × 10.3 | 2424 |
| HD 64365 | 56 391.01866 | 1.08 | 8 × 9.0 | 2809 | ||||
| HD 64365 | 56 391.99513 | 1.06 | 8 × 9.0 | 2965 | ||||
| HD 72648 | 08:32:18.99 | −43:55:53.4 | B1/B2Ib | 7.62 | 56 695.18926 | 1.07 | 10 × 49.0 | 2494 |
| HD 72648 | 56 696.25037 | 1.17 | 10 × 30.0 | 2475 | ||||
| HD 72648 | 56 697.23153 | 1.13 | 10 × 30.0 | 2435 | ||||
| HD 72754 | 08:32:23.38 | −49:36:04.8 | B2Ia:pshe | 6.90 | 56 695.20903 | 1.12 | 10 × 29.0 | 2450 |
| CPD −57 3509 | 10:35:49.01 | −58:14:54.3 | B2V | 10.70 | 56 695.22706 | 1.21 | 8 × 343.7 | 1380 |
| CPD −57 3509 | 56 696.26887 | 1.21 | 8 × 327.5 | 1828 | ||||
| HD 92206c | 10:37:22.27 | −58:37:22.8 | O6.5V((f)) | 8.22 | 56 390.05221 | 1.23 | 8 × 215.0 | 2934 |
| HD 92206c | 56 391.03316 | 1.25 | 8 × 178.7 | 2781 | ||||
| HD 92206c | 56 392.00957 | 1.29 | 10 × 187.0 | 3303 | ||||
| HD 92207 | 10:37:27.07 | −58:44:00.0 | A0Iae | 5.45 | 56 390.08338 | 1.21 | 10 × 6.0 | 2581 |
| HD 92207 | 56 391.12308 | 1.22 | 14 × 3.7 | 2769 | ||||
| HD 93027 | 10:43:17.96 | −60:08:03.2 | O9.5IV | 8.72 | 56 695.27162 | 1.23 | 6 × 130.0 | 2187 |
| HD 93027 | 56 696.38026 | 1.45 | 8 × 51.9 | 1948 | ||||
| HD 93027 | 56 697.31560 | 1.28 | 8 × 71.2 | 2203 | ||||
| CPD −59 2624 | 10:45:05.83 | −59:43:07.6 | O9.5V | 9.74 | 56 390.13365 | 1.24 | 8 × 220.0 | 2455 |
| CPD −59 2624 | 56 391.14061 | 1.25 | 8 × 211.9 | 2213 | ||||
| HD 93521 | 10:48:23.51 | +37:34:13.1 | O9Vp | 7.03 | 56 390.09829 | 2.13 | 10 × 36.3 | 3559 |
| HD 93521 | 56 391.09243 | 2.13 | 10 × 22.1 | 3049 | ||||
| HD 93521 | 56 392.10625 | 2.14 | 10 × 19.0 | 2943 | ||||
| HD 95568 | 11:00:39.59 | −62:36:50.3 | O9.5V | 9.57 | 56 391.06101 | 1.30 | 8 × 206.9 | 2715 |
| HD 95568 | 56 392.05073 | 1.31 | 8 × 210.6 | 2830 | ||||
| HD 97991 | 11:16:11.71 | −03:28:19.1 | B1V | 7.41 | 56 390.11730 | 1.07 | 8 × 32.5 | 3031 |
| HD 97991 | 56 391.10899 | 1.07 | 8 × 20.3 | 2613 | ||||
| HD 97991 | 56 392.13246 | 1.08 | 4 × 16.5 | 1818 | ||||
| HD 101008 | 11:36:56.18 | −63:23:52.5 | B1II/III | 9.16 | 56 390.16555 | 1.30 | 8 × 162.5 | 2783 |
| HD 101008 | 56 391.17133 | 1.30 | 8 × 160.0 | 2851 | ||||
| HD 101008 | 56 392.08219 | 1.31 | 8 × 128.7 | 2819 | ||||
| HD 102475 | 11:47:18.18 | −62:26:10.3 | B1II | 8.52 | 56 390.19202 | 1.30 | 8 × 111.9 | 2895 |
| HD 102475 | 56 391.19745 | 1.31 | 8 × 86.2 | 2822 | ||||
| HD 102475 | 56 392.14893 | 1.27 | 6 × 57.5 | 2355 | ||||
| HD 102475 | 56 695.30093 | 1.27 | 12 × 69.2 | 2677 | ||||
| HD 102475 | 56 697.25048 | 1.30 | 10 × 62.0 | 2452 | ||||
| HD 112784 | 13:00:05.63 | −60:35:37.2 | O9.5III | 8.26 | 56 390.22043 | 1.25 | 6 × 95.0 | 3313 |
| HD 112784 | 56 391.21647 | 1.25 | 8 × 63.1 | 2657 | ||||
| HD 112784 | 56 392.16517 | 1.24 | 6 × 35.0 | 2033 | ||||
| HD 116852 | 13:30:23.52 | −78:51:20.5 | O8.5II/III | 8.47 | 56 390.28095 | 1.76 | 8 × 90.0 | 2860 |
| HD 116852 | 56 391.27553 | 1.75 | 4 × 101.2 | 1738 | ||||
| HD 117357 | 13:31:15.49 | −61:43:57.4 | O9.5/B0V | 9.14 | 56 390.25627 | 1.28 | 8 × 141.2 | 2671 |
| HD 117357 | 56 391.23323 | 1.26 | 8 × 120.0 | 2431 | ||||
| HD 118198 | 13:36:59.50 | −63:38:45.7 | O9.7III | 8.56 | 56 390.23473 | 1.29 | 8 × 110.6 | 2933 |
| HD 118198 | 56 391.25536 | 1.31 | 8 × 85.0 | 2489 | ||||
| HD 118198 | 56 392.17514 | 1.30 | 8 × 45.0 | 2146 | ||||
| HD 125823 | 14:23:02.24 | −39:30:42.5 | B7IIIpv | 4.42 | 56 696.31364 | 1.19 | 10 × 0.8 | 2039 |
| HD 125823 | 56 697.29987 | 1.24 | 10 × 1.0 | 1879 | ||||
| HD 144470 | 16:06:48.43 | −20:40:09.1 | B1V | 3.97 | 56 390.30562 | 1.01 | 8 × 1.0 | 2781 |
| HD 144470 | 56 390.39328 | 1.10 | 8 × 3.0 | 3186 | ||||
| HD 144470 | 56 391.41532 | 1.18 | 10 × 1.0 | 2634 | ||||
| HD 144470 | 56 392.19109 | 1.33 | 8 × 1.5 | 2591 | ||||
| HD 144470 | 56 695.33098 | 1.60 | 14 × 1.3 | 2914 | ||||
| HD 144470 | 56 697.28215 | 2.38 | 12 × 1.5 | 2877 | ||||
| HD 152218A | 16:53:59.99 | −41:42:52.8 | O9.5IV(n) | 7.61 | 56 696.35275 | 1.59 | 12 × 34.6 | 2678 |
| HD 152246 | 16:54:05.30 | −41:04:46.1 | O9IV | 7.29 | 56 696.33095 | 1.83 | 12 × 22.0 | 2574 |
| HD 152246 | 56 697.38746 | 1.32 | 14 × 27.0 | 2515 | ||||
| HD 152590 | 16:56:05.22 | −40:20:57.6 | O7.5V | 8.48 | 56 695.35024 | 1.65 | 12 × 97.1 | 2650 |
| HD 152590 | 56 697.33950 | 1.71 | 12 × 79.2 | 2485 | ||||
| HD 157246 | 17:25:23.66 | −56:22:39.8 | B1Ib | 3.34 | 56 695.38144 | 1.61 | 14 × 0.5 | 2661 |
| HD 157246 | 56 697.36658 | 1.68 | 10 × 0.6 | 2413 | ||||
| HD 157857 | 17:26:17.33 | −10:59:34.8 | O6.5II | 7.78 | 56 390.36847 | 1.03 | 10 × 63.0 | 3430 |
| HD 157857 | 56 391.30226 | 1.13 | 8 × 40.0 | 2661 | ||||
| HD 163800 | 17:58:57.26 | −22:31:03.2 | O7.5III | 7.00 | 56 390.40811 | 1.00 | 8 × 57.5 | 3357 |
| HD 163800 | 56 391.31606 | 1.12 | 8 × 29.4 | 2601 | ||||
| HD 164492D | 18:02:22.59 | −23:01:59.6 | Be | – | 56 391.36958 | 1.01 | 6 × 186.0 | 1436 |
| HD 164492C | 18:02:23.24 | −23:02:00.0 | B1V | 8.76 | 56 391.34802 | 1.04 | 8 × 110.0 | 2686 |
| HD 164492A | 18:02:23.55 | −23:01:51.1 | O7.5Vz | 6.80 | 56 391.33203 | 1.08 | 8 × 40.6 | 2800 |
| HD 168607 | 18:21:14.89 | −16:22:31.8 | B9Iaep | 8.28 | 56 390.34744 | 1.09 | 6 × 103.3 | 2103 |
| HD 168625 | 18:21:19.55 | −16:22:26.1 | B6Iap | 8.37 | 56 390.32042 | 1.19 | 10 × 114.0 | 2619 |
| HD 168625 | 56 391.39364 | 1.02 | 8 × 75.6 | 2223 | ||||
Notes. The stars’ spectral type and V-band magnitude are those given by SIMBAD. The modified Julian date (MJD) is that of the beginning of the exposure sequence. Column seven lists the airmass at the beginning of the observing sequence, while column eight gives the average exposure time for each position angle and the total number of collected frames. The last column lists the S/N per pixel of Stokes I calculated using the Bonn pipeline at 4950 Å. Note that for HD 144470 two different exposure times had been adopted on the 7th of April 2013, hence the observation has been split into two sub-samples.
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