Table 1
Summary of the eight nights of observations.
| Night (*) | Programme | Programme PI | Start date | Exp. (†) | Number (§) | Mean S/N (¶) | Orbital (**) | ΔRVp (‡) |
|---|---|---|---|---|---|---|---|---|
| in UTC | Time (s) | of frames | per frame | Phase, ϕ | (km s−1) | |||
| 1 | CAT15B_146 | S. Hoyer | 27/10/2015 | 200 | 75 (75) | 147.6 | 0.517–0.564 | − 37.9 |
| 2 | CAT16B_146 | S. Hoyer | 12/10/2016 | 200 | 63 (63) | 165.9 | 0.474–0.523 | − 40.8 |
| 3 | CAT16B_43 | R. Alonso | 29/10/2016 | 200 | 60 (59) | 112.6 | 0.489–0.544 | − 45.5 |
| 4 | CAT16B_43 | R. Alonso | 02/11/2016 | 200 | 76 (41) | 173.4 | 0.435–0.460 | − 19.7 |
| 5 | 091.C-0271 | N.C. Santos | 29/09/2013 | 450 | 39 (39) | 193.8 | 0.395–0.444 | − 35.7 |
| 6 | GAPS | G. Micela | 26/07/2017 | 200 | 78 (78) | 121.3 | 0.359–0.407 | − 29.6 |
| 7 | GAPS | G. Micela | 27/07/2017 | 200 | 81 (81) | 146.3 | 0.593–0.642 | − 30.2 |
| 8 | 0101.C-0106(A) | J.H.C. Martins | 20/08/2018 | 300 | 48 (48) | 166.7 | 0.569–0.612 | − 30.2 |
Notes. The eight nights of observations include the dedicated HARPS-N observing programme (top four rows) and the archival data (bottom four rows). Both sets of observations are ordered by their start dates (in UTC). (*) The number with which each night of observations is referred to throughout this paper, for example, data collected from programme CAT15B_146 are referred to as Night 1. (†)The exposure time for each frame (§)The total number of frames (Nf) collected per night, with the Nfactually used in our analysis in brackets (see Sect. 3). (¶)The mean S/N per frame, for the frames that we used in our analysis. Discarding one frame from Night 3 and 35 frames fromNight 4 resulted in an increase in the mean S/N from 110.8 to 112.6 and 119.9 to 173.4 respectively. (**)The orbital phase (ϕ) at the start and the end of the used frames. (‡)The change in 51 Pegasi b’s RVp over the course of the used frames.
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