Table 2
Log of HARPS-N observations.
| Date | # Spectra (a) | Exp. | Airmass (b) | Seeing | S∕N | S∕N | S∕N | S∕N | S∕N | |
|---|---|---|---|---|---|---|---|---|---|---|
| [s] | 400 nm (c) | 600 nm (c) | Hα core (d) | Hβ core (d) | Hγ core (d) | |||||
| Night 1 | 2017-07-31 | 49 (22/27) | 600 | 1.5–1.02–1.7 | – | 60–131 | 98–189 | 60–120 | 64–128 | 51–105 |
| Night 2 | 2018-07-20 | 46 (22/24) | 600 | 1.7–1.02–1.4 | – | 27–79 | 70–160 | 44–100 | 64–114 | 41–79 |
Notes. (a) In parentheses:the number of spectra taken during the transit and outside the transit, respectively. (b) The three figures indicate the airmass at the start, middle and end of observations, respectively. (c) The range of signal-to-noise (S/N) ratio per pixel extracted in the continuum near 400 nm and 600 nm. (d) The range of S/N ratio in the line cores of the Hα, Hβ and Hγ lines.
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