Table 2
Comparison of a constant line vs. a sine fit for the FWHM phase variations.
| Epoch | Mask | Mean | Mean error | STD | RMSconst |  |
RMSsine |  |
|---|---|---|---|---|---|---|---|---|
| (km s−1) | (km s−1) | (km s−1) | (km s−1) | (km s−1) | ||||
| 2019a | default | 19 | 0.29 | 0.40 | 0.40 | 1.8 | 0.39 | 2.0 |
| geff > 1.2 | 23 | 0.46 | 1.16 | 1.16 | 6.9 | 1.13 | 8.0 | |
| 2019b | default | 21 | 0.41 | 0.63 | 0.63 | 2.3 | 0.62 | 2.5 |
| geff > 1.2 | 27 | 0.84 | 1.77 | 1.77 | 6.7 | 1.71 | 6.9 | |
| 2020a | default | 21 | 0.41 | 0.68 | 0.68 | 3.2 | 0.61 | 3.4 |
| geff > 1.2 | 27 | 0.82 | 2.47 | 2.47 | 12.2 | 2.29 | 13.3 | |
| 2020b | default | 19 | 0.30 | 0.47 | 0.47 | 3.0 | 0.47 | 3.4 |
| geff > 1.2 | 22 | 0.46 | 0.83 | 0.83 | 5.3 | 0.79 | 7.3 |
Notes. The columns are: 1) subset of the time series, 2) line list used in LSD computation, 3) mean value of FWHM, 4) mean error bar on FWHM, 5) dispersion of the data set, 6) RMS (Root Mean Square) residual of a constant line fit equal to the average of the data set, 7) reduced χ2 of the constant fit, 8) RMS residual of a sine fit at the stellar rotation period, 9) reduced χ2 of the sine fit.
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