Table A.1
Best-fitting GP hyperparameters and detrending parameters.
| Parameter [unit] | Description |  |
|---|---|---|
| log σCHEOPS [ppt] | log of scatter in the CHEOPS data |  |
| log σTESS [ppt] | log of scatter in the TESS data |  |
| φω0,CHEOPS [1/deg] | typical frequency of variation in the shared CHEOPS roll-angle GP |  |
| ω0,TESS [1/d] | frequency for the TESS SHOTerm GP kernel |  |
| φS0,CHEOPS | scaled power in the shared CHEOPS roll-angle GP |  |
| S 0,TESS | scaled power in the TESS SHOTerm GP kernel |  |
| φpoweг,CHEOPS | power in the shared CHEOPS roll-angle GP |  |
| φlengthscale,CHEOPS [deg] | typical lengthscale of variation in the shared CHEOPS rollangle GP |  |
| dƒ/d(time)1st,CHEOPS | linear detrending parameter for time trend vs. flux – 1st CHEOPS visit | 0.075 ± 0.011 |
| dƒ/d(bg)1st,CHEOPS | linear detrending parameter for background vs. flux – 1st CHEOPS visit | −0.026 ± 0.036 |
 |
quadratic detrending parameter for background vs. flux – 1st CHEOPS visit | 0.0278 ± 0.0025 |
| dƒ/d(centгoid x)1st,CHEOPS | linear detrending parameter for x centroid vs. flux – 1st CHEOPS visit |  |
| dƒ/d(centгoid y)1st,CHEOPS | linear detrending parameter for y centroid vs. flux – 1st CHEOPS visit |  |
| dƒ/d(centroid x)2nd,CHEOPS | linear detrending parameter for x centroid vs. flux – 2nd CHEOPS visit |  |
 |
quadratic detrending parameter for x centroid vs. flux – 2nd CHEOPS visit | −0.0304 ± 0.0083 |
| dƒ/d(time)3rd,CHEOPS | linear detrending parameter for time trend vs. flux – 3rd CHEOPS visit | 0.015 ± 0.010 |
| dƒ/d(centгoid y)3rd,CHEOPS | linear detrending parameter for y centroid vs. flux – 3rd CHEOPS visit |  |
| dƒ/d(time)4th,CHEOPS | linear detrending parameter for time trend vs. flux – 4th CHEOPS visit | 0.103 ± 0.013 |
| dƒ/d(centroid y)4th,CHEOPS | linear detrending parameter for y centroid vs. flux – 4th CHEOPS visit | −0.061 ± 0.010 |
 |
quadratic detrending parameter for y centroid vs. flux – 4th CHEOPS visit | 0.0086 ± 0.0019 |
| xmean,1st,CHEOPS [ppt] | the average offset of the median-normalised flux – 1st CHEOPS visit | 0.007 ± 0.011 |
| xmean,2nd,CHEOPS [ppt] | the average offset of the median-normalised flux – 2nd CHEOPS visit | 0.066 ± 0.011 |
| xmean,3rd,CHEOPS [ppt] | the average offset of the median-normalised flux – 3rd CHEOPS visit | 0.039 ± 0.010 |
| xmean,4th,CHEOPS [ppt] | the average offset of the median-normalised flux – 4th CHEOPS visit | 0.314 ± 0.014 |
| xmean,5th,CHEOPS [ppt] | the average offset of the median-normalised flux – 5th CHEOPS visit | 0.061 ± 0.011 |
| xmean,TESS [ppt] | the average offset of the median-normalised flux in TESS data |  |
Notes. Based on the joint fit of the TESS and CHEOPS photometric data, and RV observations. The table shows the best-fitting value of the given parameter and its ±1σ uncertainty. The fitted values correspond to quantile 0.50 (median) and the uncertainties to quantils ±0.341 in the parameter distributions obtained from the samples.
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