Table B.1
Priors for the joint modeling of photometric and radial velocity data.
| Parameters | Distribution | TOI-5153 | NGTS-20 |
|---|---|---|---|
| Orbital period (days) | Normal | (Palias, 0.1) | (54, 0.5) |
| Time of transit T0 (days) | Uniform | (2458485.9, 2458486.3) | (2458432.89, 2458433.1) |
| Radius ratio Rp/R* | Uniform | (0, 1) | (0, 1) |
| Impact parameter | Uniform | (0, 1) | (0, 1) |
| Stellar density (kg.m−3) | Normal | (685.24, 79.18) | (366.84, 62.71) |
| TESS limb darkening q1 | Normal | (0.274, 0.027) | (0.308, 0.038) |
| TESS limb darkening q2 | Normal | (0.275, 0.029) | (0.270, 0.03) |
| NGTS limb darkening q1 | Uniform | - | (0.372, 0.037) |
| NGTS limb darkening q2 | Uniform | - | (0.251, 0.028) |
| Eccentricity | Kumaraswamy / fixed | (0.867, 3.03)/0.0 | (0.867, 3.03) |
| Argument of periastron (deg) | Uniform | (0, 360) | (0, 360) |
| TESS offsets | Normal | (0, 0.01) | (0, 0.01) |
| TESS jitters (ppm) | LogUniform | (0.1, 1000) | (0.1, 1000) |
| NGTS offsets | Normal | - | (0.0, 0.01) |
| NGTS jitters (ppm) | LogUniform | - | (0.1, 10000) |
| TESS dilution factor | Normal | (0.992, 0.00003) | - |
| GP amplitude TESS (relative flux) | LogUniform | (1e-6, 100.0) | (1e-6, 100.0) |
| GP timescale TESS (days) | LogUniform | (0.001, 100.0) | (0.001, 100.0) |
| GP amplitude TESS 2 (relative flux) | LogUniform | (1e-6, 100.0) | - |
| GP timescale TESS 2 (days) | LogUniform | (0.001, 100.0) | - |
| GP amplitude NGTS (relative flux) | LogUniform | - | (1e-6, 10.0) |
| GP timescale NGTS (days) | Uniform | - | (0.001, 10.0) |
| GP amplitude NGTS 2 (relative flux) | LogUniform | - | (1e-6, 10.0) |
| GP timescale NGTS 2 (days) | Uniform | - | (0.001, 10.0) |
| Semi-amplitude (km.s−1) | Uniform | (0, 100) | (0, 100) |
| Spectrograph offsets (km.s−1) | Uniform | (−100, 100) | (−100, 100) |
| Spectrograph jitters (km.s−1) | LogUniform | (0.001, 0.2) | (0.001, 0.2) |
Notes. Priors differ for TOI-5153 and NGTS-20. The normal distribution is defined by two parameters, a mean and a variance. For the uniform and log uniform distributions, the two parameters define the lower and upper bounds of the distribution. Palias can take three values: 20.91, 20.33, 19.78 days and corresponds to period aliases compatible with the radial velocity analysis. The priors on the radial velocity offsets and jitters are identical for all spectrographs: CORALIE, CHIRON, FEROS, and HARPS.
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