Open Access
Table 2
VLT/CRIRES+ observations used in this work.
| Night 1 | ||
|---|---|---|
| Parameter | Symbol/units | Value |
| Date | YYYY-MM-DD | 2022-03-11 |
| Obs. start | UTC | 03:54:23 |
| Transit start | ″ | 05:32 |
| Transit mid-point | ″ | 06:55 |
| Transit end | ″ | 08:17 |
| Obs. end | ″ | 09:30:11 |
| No. exposures (in/out) | 64 (34/30) | |
| Exposure length | [s] | 300 |
| Avg. S/N per pixel | 132 | |
| Airmass | 1.19–1.03–1.59 | |
| Relative humidity | % | 15–27 |
| Seeing | ″ | 0.32–1.04 |
| Avg. resolution | R | 143 000 |
| Night 2 | ||
| Parameter | Symbol/units | Value |
| Date | YYYY-MM-DD | 2023-02-23 |
| Obs. start | UTC | 04:55:26 |
| Transit start | ″ | 05:48 |
| Transit mid-point | ″ | 07:11 |
| Transit end | ″ | 08:33 |
| Obs. end | ″ | 09:16:53 |
| No. exposures (in/out) | 50 (34/16) | |
| Exposure length | (s) | 300 |
| Avg. S/N per pixel | 130 | |
| Airmass | 1.20–1.03–1.21 | |
| Relative humidity | % | 27–38 |
| Seeing | ″ | 0.58–1.26 |
| Avg. resolution | R | 125 300 |
| General settings | ||
| Parameter | Symbol/units | Value |
| Wavelength setting | K2148 | |
| Wavelength coverage | μm | 1.972–2.452 |
| No. echelle orders | 6 | |
| Exposure time | (s) | 300 |
| Readout time | (s) | 14 |
| Nodding pattern | ABBA | |
Notes. Relative humidity and seeing are given by their minimum and maximum values of the night. Airmass is given by three values corresponding to the start of the observation, the minimum value (occurring close to mid-transit), and the end of the observation.
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