Table 1
Log of the spectroscopic and spectropolarimetric observations of Vega.
| Year (1) | Instrument (2) | BJDfirst (3) | BJDlast (4) | tcov (d) (5) | Nspec (6) | texp (s) (7) | S/N (8) |
|---|---|---|---|---|---|---|---|
| 2018 | Narval | 8331.3406 | 8337.6238 | 6.28 | 568 | 4 × 13 | 2216±326 |
| 2018 | SOPHIE | 8331.3418 | 8336.6512 | 5.31 | 2704 | 20 | 934±324 |
| 2023 | NEO-NARVAL | 10152.3752 | 10169.5444 | 17.12 | 1426 | 4 × 15 | 1242±536 |
| 2024 | NEO-NARVAL | 10564.3111 | 10571.4165 | 7.11 | 607 | 4 × 15 | 747±179 |
Notes. (1) Year of observations; (2) instrument (Narval(TBL): spectropolarimetry, NEO-NARVAL(TBL): spectropolarimetry, SOPHIE(OHP) spectroscopy); (3 and 4) barycentric Julian date (mid observation, 2 450 000+) of the first and the last stellar spectrum of the run; (5) BJD range; (6) numbeR of high resolution intensity spectra obtained. For NARVAL and NEO-NARVAL, the total number of acquired spectra is four times the amount indicated in this column, an intensity spectrum being the combination of four subexposures; (7) exposurE time for SOPHIE or individual exposure times in a polarimetric sequence for NARVAL/NEO-NARVAL; (8) mean and standard deviation of the signal to noise ratio per resolved element at 520 nm.
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