Table 1.
Measured values for the linear polarisation and PA of GRB 210610B.
| Epoch | Bandpass | Instrument/Telescope | qsky | usky | PLin | PLin, Debiased | θ | S/N |
|---|---|---|---|---|---|---|---|---|
| t − t0 (day) | (%) | (%) | (°) | |||||
| 0.1205 | RC | CAHA/CAFOS | 0.2 ± 2.4 | –0.01 ± 0.31 | 4.50 ± 1.45 | 4.27 ± 1.45 | 183 ± 9 | > 500 |
| 0.2418 | RSpecial | VLT/FORS2 | –0.30 ± 0.32 | –0.29 ± 0.20 | 0.28 ± 0.20 | – | 267 ± 19 | > 710 |
| 0.2593 | RSpecial | VLT/FORS2 | –0.79 ± 0.28 | 0.81 ± 0.22 | 0.60 ± 0.24 | – | 17 ± 11 | > 690 |
| 0.2698 | bHigh | VLT/FORS2 | – | – | 0.18 ± 0.16 | – | 187 ± 24 | > 395 |
| 0.2803 | zSpecial | VLT/FORS2 | – | – | 0.23 ± 0.28 | – | 199 ± 35 | > 180 |
| 1.2674 | RSpecial | VLT/FORS2 | –0.13 ± 0.22 | 0.06 ± 0.07 | 2.28 ± 0.22 | 2.27 ± 0.22 | 237 ± 3 | > 330 |
| 1.2766 | RSpecial | VLT/FORS2 | –0.36 ± 0.39 | 0.06 ± 0.07 | 1.72 ± 0.27 | 1.69 ± 0.27 | 238 ± 5 | > 300 |
Notes. When the standard corrected PA is negative, it was corrected to positive values by subtracting it from 360°. We measured the (S/N) in each beam and at each HWP angle image. The value we present here is the lowest we measured in one beam in one image at a certain HWP angle.
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