Table 1
Observing log of the HD 209458b transit observations.
| Night | Tel. | Instrument | Date of | texp | Nobs | S∕N(a) | S∕N(b) | Analysis | Fibre B |
|---|---|---|---|---|---|---|---|---|---|
| observation | [s] | Na I order | Na I core | atmosphere/RM fit | |||||
| 1 | TNG | HARPS-N | 2015-09-26 | 600 | 32 | 162 | 51 | Yes/Yes | Na I sky emission |
| 2 | TNG | HARPS-N | 2016-07-25 | 600 | 42 | 63 | 20 | No/Yes | Na I sky emission |
| 3 | TNG | HARPS-N | 2016-09-16 | 600 | 45 | 136 | 43 | Yes/Yes | Fabry-Pérot observations |
| 4 | TNG | HARPS-N | 2017-07-16 | 300/600 | 38 | 64 | 20 | No/Yes | Na I sky emission |
| 5 | TNG | HARPS-N | 2017-09-07 | 300 | 61 | 108 | 33 | Yes/Yes | Fabry-Pérot observations |
| 6 | CA 3.5 m | CARMENES | 2016-09-09 | 180 | 38 | 82 | 37 | No/Yes | No observable Na I sky emission |
| 7 | CA 3.5 m | CARMENES | 2016-09-16 | 180 | 70 | 87 | 40 | Yes/Yes | Na I sky emission |
| 8 | CA 3.5 m | CARMENES | 2016-11-08 | 180 | 80 | 54 | 22 | No/Yes | Na I sky emission |
| 9 | CA 3.5 m | CARMENES | 2018-09-05 | 192 | 82 | 84 | 38 | Yes/Yes | No observable Na I sky emission |
Notes. (a) Averaged S/N per extracted pixel calculated in the Na I order (53 for HARPS-N and 104 for CARMENES) for each night. (b) Averaged S/N in the Na I D2 and D1 line cores (calculated in ± 5 km s−1 centred on the cores). This calculation is performed by dividing the flux of each pixel by its photon noise.
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