Table 1
FORS2 Observing log and average longitudinal magnetic field (⟨Bz⟩) values.
| Date | JD− | No. of | Exposure | S/N at | ⟨Bz ⟩ (G) | ⟨Nz⟩ (G) | ⟨Bz⟩ (G) | ⟨Nz⟩ (G) |
|---|---|---|---|---|---|---|---|---|
| YYYY-MM-DD | 2450000 | frames | time (s) | 4950 Å | Hydrogen | All | ||
| 2021-03-15 | 9288.74493 | 40 | 30 | 1741 | −9004 ± 170 | −129 ± 137 | −7626 ± 86 | −32 ± 71 |
| 2021-03-24 | 9297.70603 | 40 | 30 | 1975 | −8146 ± 159 | 16 ± 135 | −7068 ± 92 | −117 ± 73 |
| 2021-06-10 | 9376.49805 | 40 | 30 | 1307 | −7377 ± 266 | 278 ± 219 | −6718 ± 134 | 154 ± 114 |
| 2021-06-12 | 9377.78924 | 40 | 30 | 1886 | −7963 ± 189 | −28 ± 165 | −7043 ± 85 | 97 ± 73 |
| 2021-07-01a | 9396.15904 | 40 | 30 | 2156 | −7549 ± 140 | 85 ± 117 | −6538 ± 70 | 16 ± 55 |
| 2021-07-01b | 9396.21277 | 80 | 30 | 2761 | −7283 ± 126 | −48 ± 100 | −6422 ± 67 | −27 ± 51 |
| 2021-07-08 | 9403.13370 | 36 | 30 | 1738 | −7823 ± 164 | −238 ± 116 | −6872 ± 81 | −80 ± 68 |
| 2021-07-11 | 9406.12985 | 36 | 30 | 1539 | −8375 ± 222 | −799 ± 202 | −6820 ± 105 | −362 ± 86 |
| 2021-07-14 | 9409.14539 | 18 | 30 | 782 | −8382 ± 424 | 690 ± 304 | −6721 ± 208 | 128 ± 154 |
| 2021-07-18 | 9413.10564 | 36 | 30 | 1490 | −8914 ± 194 | −170 ± 171 | −7806 ± 103 | −55 ± 87 |
Notes. Julian date listed in the second column is that at the beginning of the exposure sequence. Columns three and four give the number of frames obtained during each night of observation and the exposure time of each frame, respectively. Column five lists the S/N per pixel of the intensity spectrum (Stokes I) calculated at ≈4950 Å over a wavelength range of 100 Å. Columns six and seven list the ⟨Bz⟩ and ⟨Nz⟩ values obtained employing the hydrogen lines from the Stokes V and N parameter spectra, respectively. Columns eight and nine are the same as columns six and seven, but employing the full spectrum.
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