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Table C.1

Individual epochs with FORS2.

Serkowski curve
Name Filter Epoch Passband P (%) PQ (%) PU (%) λmax (Å) Pmax (%) K
HD 141318 free 2014-10-10 00:23:57 5827 ± 40 2.43 ± 0.01 1.11 ± 0.06
B 2.28 ± 0.02 −0.41 ± 0.01 2.24 ± 0.02 50.2 ± 0.2
V 2.43 ± 0.01 −0.52 ± 0.01 2.38 ± 0.01 51.2 ± 0.2
R 2.40 ± 0.01 −0.55 ± 0.01 2.34 ± 0.01 51.7 ± 0.1
I 2.18 ± 0.01 −0.50 ± 0.01 2.12 ± 0.01 51.7 ± 0.1
HD 141318 free 2014-10-10 00:27:27 5770 ± 23 2.46 ± 0.01 1.29 ± 0.04
B 2.30 ± 0.01 −0.40 ± 0.01 2.26 ± 0.01 50.0 ± 0.1
V 2.46 ± 0.01 −0.52 ± 0.01 2.40 ± 0.01 51.1 ± 0.1
R 2.41 ± 0.01 −0.55 ± 0.01 2.35 ± 0.01 51.6 ± 0.1
I 2.15 ± 0.01 −0.48 ± 0.01 2.10 ± 0.01 51.4 ± 0.1
HD 141318 GG435 2014-10-10 00:37:56 5544 ± 57 2.43 ± 0.01 1.24 ± 0.08
B 2.35 ± 0.02 −0.49 ± 0.02 2.30 ± 0.02 51.0 ± 0.2
V 2.44 ± 0.01 −0.50 ± 0.01 2.39 ± 0.01 50.9 ± 0.1
R 2.36 ± 0.01 −0.50 ± 0.01 2.31 ± 0.01 51.1 ± 0.1
I 2.06 ± 0.01 −0.39 ± 0.01 2.02 ± 0.01 50.6 ± 0.1
HD 141318 GG435 2014-10-10 00:46:02 5851 ± 79 2.38 ± 0.01 0.81 ± 0.08
B 2.33 ± 0.02 −0.46 ± 0.02 2.28 ± 0.02 50.7 ± 0.2
V 2.40 ± 0.01 −0.44 ± 0.01 2.36 ± 0.01 50.3 ± 0.1
R 2.37 ± 0.01 −0.46 ± 0.01 2.32 ± 0.01 50.6 ± 0.1
I 2.20 ± 0.01 −0.46 ± 0.01 2.15 ± 0.01 51.0 ± 0.1
HD 152245 free 2014-10-13 00:22:31 6360 ± 63 0.93 ± 0.01 1.32 ± 0.12
B 0.80 ± 0.01 −0.10 ± 0.01 0.79 ± 0.01 48.4 ± 0.4
V 0.91 ± 0.01 −0.10 ± 0.01 0.90 ± 0.01 48.3 ± 0.3
R 0.92 ± 0.01 −0.10 ± 0.01 0.92 ± 0.01 48.2 ± 0.2
I 0.84 ± 0.01 −0.06 ± 0.01 0.84 ± 0.01 47.2 ± 0.2
HD 152245 GG435 2015-02-06 08:26:24 6174 ± 64 1.01 ± 0.01 1.25 ± 0.12
B 0.92 ± 0.01 0.18 ± 0.01 0.90 ± 0.01 39.3 ± 0.4
V 0.98 ± 0.01 0.24 ± 0.01 0.95 ± 0.01 38.0 ± 0.2
R 0.98 ± 0.01 0.25 ± 0.01 0.94 ± 0.01 37.6 ± 0.1
I 0.88 ± 0.01 0.26 ± 0.01 0.84 ± 0.01 36.4 ± 0.2
HD 152245 GG435 2015-02-06 08:31:36.880 6465 ± 66 1.0 ± 0.01 1.13 ± 0.11
B 0.88 ± 0.01 0.22 ± 0.01 0.85 ± 0.01 37.9 ± 0.5
V 0.95 ± 0.01 0.28 ± 0.01 0.91 ± 0.01 36.4 ± 0.2
R 0.97 ± 0.01 0.30 ± 0.01 0.92 ± 0.01 36.1 ± 0.1
I 0.91 ± 0.01 0.30 ± 0.01 0.85 ± 0.01 35.3 ± 0.2
HD 54439 free 2014-10-27T05:39:01 4802 ± 196 0.8 ± 0.01 0.82 ± 0.13
B 0.76 ± 0.01 0.04 ± 0.01 −0.76 ± 0.01 136.6 ± 0.5
V 0.76 ± 0.01 0.09 ± 0.01 −0.76 ± 0.01 138.2 ± 0.4
R 0.72 ± 0.01 0.11 ± 0.01 −0.71 ± 0.01 139.3 ± 0.2
I 0.64 ± 0.01 0.07 ± 0.01 −0.64 ± 0.01 138.2 ± 0.4
HD 54439 GG435 2014-10-27 05:50:15 4756 ± 268 0.79 ± 0.01 1.11 ± 0.22
B 0.74 ± 0.02 0.10 ± 0.02 −0.73 ± 0.02 139.0 ± 0.7
V 0.75 ± 0.01 0.11 ± 0.01 −0.74 ± 0.01 139.3 ± 0.4
R 0.69 ± 0.01 0.15 ± 0.01 −0.68 ± 0.01 141.2 ± 0.3
I 0.58 ± 0.01 0.15 ± 0.01 −0.56 ± 0.01 142.4 ± 0.4
HD 73420 free 2014-10-27 06:04:31 6756 ± 323 0.55 ± 0.01 0.65 ± 0.23
B 0.35 ± 0.01 0.35 ± 0.01 −0.04 ± 0.02 176.4 ± 1.0
V 0.37 ± 0.01 0.36 ± 0.01 −0.10 ± 0.01 172.5 ± 0.7
R 0.36 ± 0.01 0.35 ± 0.01 −0.08 ± 0.01 173.4 ± 0.4
I 0.33 ± 0.01 0.32 ± 0.01 −0.08 ± 0.01 172.5 ± 0.6
HD 73420 GG435 2014-10-27 06:41:43 6482 ± 150 0.42 ± 0.01 1.22 ± 0.28
B 0.35 ± 0.02 0.34 ± 0.02 −0.08 ± 0.02 173.3 ± 1.3
V 0.38 ± 0.01 0.35 ± 0.01 −0.15 ± 0.01 168.4 ± 0.6
R 0.38 ± 0.01 0.36 ± 0.01 −0.14 ± 0.01 169.2 ± 0.4
I 0.30 ± 0.01 0.28 ± 0.01 −0.11 ± 0.01 168.8 ± 0.6
HD 78785 free 2014-11-14 07:04:31 5771 ± 10 3.96 ± 0.01 1.22 ± 0.02
B 3.64 ± 0.01 3.39 ± 0.01 1.30 ± 0.01 10.5 ± 0.1
V 3.88 ± 0.01 3.63 ± 0.01 1.37 ± 0.01 10.3 ± 0.1
R 3.80 ± 0.01 3.53 ± 0.01 1.39 ± 0.01 10.8 ± 0.1
I 3.40 ± 0.01 3.16 ± 0.01 1.26 ± 0.01 10.9 ± 0.1
HD 78785 GG435 2014-11-14 06:54:19 5766 ± 16 3.97 ± 0.01 1.18 ± 0.02
B 3.73 ± 0.02 3.48 ± 0.02 1.35 ± 0.02 10.6 ± 0.1
V 3.89 ± 0.01 3.65 ± 0.01 1.34 ± 0.01 10.0 ± 0.1
R 3.81 ± 0.01 3.55 ± 0.01 1.38 ± 0.01 10.6 ± 0.1
I 3.41 ± 0.01 3.18 ± 0.01 1.24 ± 0.01 10.6 ± 0.1
HD 78785 GG435 2014-11-14 07:13:33 5754 ± 17 3.94 ± 0.01 1.18 ± 0.02
B 3.71 ± 0.02 3.45 ± 0.02 1.37 ± 0.02 10.8 ± 0.1
V 3.86 ± 0.01 3.62 ± 0.01 1.34 ± 0.01 10.2 ± 0.1
R 3.78 ± 0.01 3.52 ± 0.01 1.38 ± 0.01 10.7 ± 0.1
I 3.38 ± 0.01 3.15 ± 0.01 1.24 ± 0.01 10.8 ± 0.1
HD 96042 free 2014-12-21 08:14:55 4816 ± 255 0.58 ± 0.01 0.93 ± 0.19
B 0.59 ± 0.01 −0.38 ± 0.01 −0.45 ± 0.01 115.1 ± 0.5
V 0.60 ± 0.01 −0.40 ± 0.01 −0.45 ± 0.01 114.0 ± 0.4
R 0.57 ± 0.01 −0.38 ± 0.01 −0.42 ± 0.01 114.0 ± 0.3
I 0.51 ± 0.01 −0.34 ± 0.01 −0.38 ± 0.01 114.2 ± 0.4
HD 96042 free 2014-12-21 08:22:47 4850 ± 245 0.60 ± 0.01 0.90 ± 0.18
B 0.60 ± 0.01 −0.39 ± 0.01 −0.46 ± 0.01 114.7 ± 0.5
V 0.62 ± 0.01 −0.41 ± 0.01 −0.46 ± 0.01 114.1 ± 0.4
R 0.59 ± 0.01 −0.39 ± 0.01 −0.44 ± 0.01 114.2 ± 0.3
I 0.54 ± 0.01 −0.36 ± 0.01 −0.40 ± 0.01 114.1 ± 0.4
HD 96042 GG435 2015-01-02 07:25:12 3494 ± 955 0.64 ± 0.05 0.51 ± 0.24
B 0.62 ± 0.02 −0.34 ± 0.02 −0.52 ± 0.02 118.5 ± 0.8
V 0.60 ± 0.01 −0.36 ± 0.01 −0.49 ± 0.01 116.9 ± 0.5
R 0.56 ± 0.01 −0.33 ± 0.01 −0.46 ± 0.01 117.2 ± 0.3
I 0.51 ± 0.01 −0.32 ± 0.01 −0.40 ± 0.01 115.8 ± 0.5
HD 96042 GG435 2015-01-02 07:29:02 5116 ± 242 0.59 ± 0.01 1.43 ± 0.30
B 0.59 ± 0.02 −0.35 ± 0.02 −0.48 ± 0.02 117.0 ± 1.0
V 0.62 ± 0.01 −0.39 ± 0.01 −0.47 ± 0.01 115.1 ± 0.5
R 0.58 ± 0.01 −0.36 ± 0.01 −0.45 ± 0.01 115.4 ± 0.3
I 0.49 ± 0.01 −0.31 ± 0.01 −0.37 ± 0.01 115.0 ± 0.5
HD 152853 free 2015-02-03 07:45:45 5804 ± 75 1.78 ± 0.02 1.35 ± 0.14
B 1.57 ± 0.01 1.19 ± 0.01 1.02 ± 0.01 20.3 ± 0.2
V 1.71 ± 0.01 1.29 ± 0.01 1.13 ± 0.01 20.6 ± 0.2
R 1.71 ± 0.01 1.26 ± 0.01 1.15 ± 0.01 21.1 ± 0.1
I 1.42 ± 0.01 1.04 ± 0.01 0.97 ± 0.01 21.5 ± 0.2
HD 152853 GG435 2015-02-03 08:03:39 5619 ± 67 1.69 ± 0.01 1.11 ± 0.08
B 1.59 ± 0.02 1.18 ± 0.02 1.06 ± 0.02 21.0 ± 0.3
V 1.64 ± 0.01 1.21 ± 0.01 1.10 ± 0.01 21.2 ± 0.2
R 1.60 ± 0.01 1.14 ± 0.01 1.12 ± 0.01 22.3 ± 0.1
I 1.41 ± 0.01 0.98 ± 0.01 1.00 ± 0.01 22.8 ± 0.1
HD 137569a,b free 2015-02-03 08:31:58 … … …
B 0.11 ± 0.01 −0.09 ± 0.01 0.05 ± 0.01 …
V 0.13 ± 0.01 −0.11 ± 0.01 0.07 ± 0.01 …
R 0.11 ± 0.01 −0.10 ± 0.01 0.06 ± 0.01 …
I 0.09 ± 0.01 −0.08 ± 0.01 0.05 ± 0.01 …
HD 137569a,b free 2015-02-03T08:43:51 … … …
B 0.11 ± 0.01 −0.11 ± 0.01 0.04 ± 0.01 …
V 0.12 ± 0.01 −0.12 ± 0.01 0.04 ± 0.01 …
R 0.11 ± 0.01 −0.10 ± 0.01 0.05 ± 0.01 …
I 0.09 ± 0.01 −0.06 ± 0.01 0.06 ± 0.01 …
HD 137569a,b GG435 2015-02-06 07:58:28 … … …
B 0.10 ± 0.03 0.08 ± 0.03 0.06 ± 0.03 …
V 0.07 ± 0.02 0.07 ± 0.02 0.02 ± 0.02 …
R 0.11 ± 0.01 0.10 ± 0.01 0.03 ± 0.01 …
I 0.13 ± 0.01 0.11 ± 0.01 0.06 ± 0.01 …
HD 137569a,b GG435 2015-02-06 08:45:46 … … …
B 0.47 ± 0.02 −0.21 ± 0.02 0.42 ± 0.02 …
V 0.39 ± 0.01 −0.15 ± 0.01 0.36 ± 0.01 …
R 0.31 ± 0.01 −0.14 ± 0.01 0.27 ± 0.01 …
I 0.19 ± 0.01 −0.12 ± 0.01 0.15 ± 0.01 …
HD 137569a,b GG435 2015-02-06 08:49:35 … … …
B 0.09 ± 0.02 −0.09 ± 0.02 0.02 ± 0.02 …
V 0.06 ± 0.01 −0.04 ± 0.01 0.04 ± 0.01 …
R 0.04 ± 0.01 −0.02 ± 0.01 0.03 ± 0.01 …
I 0.03 ± 0.01 0.02 ± 0.01 0.03 ± 0.01 …
HD 137569a,b GG435 2015-02-06 08:58:20 … … …
B 0.47 ± 0.02 −0.21 ± 0.02 −0.42 ± 0.02 …
V 0.40 ± 0.01 −0.18 ± 0.01 −0.36 ± 0.01 …
R 0.34 ± 0.01 −0.11 ± 0.01 −0.32 ± 0.01 …
I 0.30 ± 0.01 −0.05 ± 0.01 −0.29 ± 0.01 …

Notes. The errors in this table are statistical only, while the root-mean-square of the Stokes Q and U is ~ 0.05%. (a) The constant polarization curve of this star could not be fitted well with a Serkowski curve. (b) The polarization angle could not be determined due to low polarization degree.

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