Table 3.
Intrinsic polarisation of MAXI J1820+070.
| B | V | R | |||||
|---|---|---|---|---|---|---|---|
| PISM | MJD | P (%) | PA (°) | P (%) | PA (°) | P (%) | PA (°) |
| Star 2 | < 58222 | 0.72 ± 0.01(.24) | 23.4 ± 0.4(9.4) | 0.59 ± 0.01(.17) | 23.1 ± 0.5(8.5) | 0.41 ± 0.01(.10) | 23.7 ± 0.7(7.1) |
| > 58222 | 0.78 ± 0.02(.24) | 22.1 ± 0.7(8.8) | 0.73 ± 0.02(.17) | 23.4 ± 0.8(6.8) | 0.65 ± 0.02(.10) | 21.4 ± 0.9(4.6) | |
| 2,3,6,7,9 | < 58222 | 0.28 ± 0.01(.03) | 10.0 ± 1.0(3.4) | 0.37 ± 0.01(.03) | 23.3 ± 0.8(2.6) | 0.30 ± 0.01(.02) | 29.8 ± 0.9(2.0) |
| > 58222 | 0.35 ± 0.02(.04) | 9.4 ± 1.6(3.0) | 0.52 ± 0.02(.04) | 23.6 ± 1.1(2.1) | 0.52 ± 0.02(.03) | 24.3 ± 1.1(1.5) | |
Notes.The statistical errors are given after the average values, and the systematic uncertainties arising from the subtraction of the ISM polarisation are given in brackets. The intrinsic polarisation was obtained using two estimates of the ISM polarisation: from the closest field star 2 (two top rows), and from the five-star average (two bottom rows). Upper and lower rows correspond to the average polarisation parameters before and after MJD 58222, respectively.
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