Table 1
Observational conditions for the eight nights of observations of GJ 1214 b.
| Night | Date | Duration (tot./pre/post) | Exptime (s) | Nexp | Mean S/N | Airmass (start – min – end) | Humidity (%) | RV shift (km/s) |
|---|---|---|---|---|---|---|---|---|
| 1 | 2022 Mar. 11 | 2.2 h/0.4 h/0.7 h | 240 | 32 | 72 | 1.84 − 1.21 − 1.21 | 31 | 5.6 |
| 2 | 2022 Mar. 30 | 2.5 h/0.4 h/1.2 h | 240 | 38 | 93 | 1.63 − 1.15 − 1.15 | 10 | 3.5 |
| 3 | 2022 Jul. 03 | 3.4 h/1.3 h/1.2 h | 240 | 50 | 100 | 1.32 − 1.15 − 1.26 | 3 | −31.8 |
| 4 | 2022 Aug. 10 | 3.1 h/0.4 h/1.7 h | 240 | 46 | 84 | 1.15 − 1.15 − 1.65 | 4 | −44.0 |
| 5 | 2023 Jun. 22 | 2.7 h/0.8 h/1.0 h | 240 | 40 | 81 | 1.31 − 1.15 − 1.18 | 17 | −27.1 |
| 6 | 2023 Aug. 10 | 3.0 h/1.6 h/0.5 h | 240 | 44 | 83 | 1.16 − 1.16 − 1.95 | 11 | −44.0 |
| 7 | 2024 Aug. 06 | 2.8 h/1.4 h/0.5 h | 240 | 40 | 40 | 1.28 − 1.15 − 1.21 | 14 | −43.0 |
| 8 | 2024 Aug. 17 | 4.3 h/2.7 h/0.6 h | 240 | 62 | 62 | 1.18 − 1.15 − 1.97 | 3 | −45.4 |
Notes. Mean S/N is given per pixel. Observing duration is given in total and for post and pre transit. The absolute RV shift is given between Earth and the stellar rest frame (the latter of which is equal to the planet rest frame at the time of mid-transit).
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