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Table B.1

Priors for the joint modeling of photometric and radial velocity data.

Parameters Distribution TOI-5678 b
Orbital period (days) Uniform (40, 60)
Time of transit T0 (days) Uniform (2458485.9, 2458486.3)
Radius ratio Uniform (0, 1)
Impact parameter Uniform (0, 1)
Stellar density Normal (685.24, 79.18)
TESS limb darkening q1 Normal (0.274, 0.027)
TESS limb darkening q2 Normal (0.275, 0.029)
CHEOPS limb darkening q1 Uniform (0.47, 0.05)
CHEOPS limb darkening q2 Uniform (0.363, 0.015)
Eccentricity Kumaraswamy / fixed (0.867, 3.03)
Argument of periastron Uniform (0, 2π)
TESS offsets Normal (0, 0.01)
TESS jitters (ppm) LogUniform (0.1, 1000)
CHEOPS offsets Normal (0, 0.01)
CHEOPS jitters (ppm) LogUniform (0.1, 1000)
GP amplitude TESS (relative flux) LogUniform (1e-06, 100.0)
GP time-scale TESS (days) LogUniform (0.001, 100.0)
GP amplitude TESS 2 (relative flux) LogUniform (1e-06, 100.0)
GP time-scale TESS 2 (days) LogUniform (0.001, 100.0)
Background CHEOPS (relative flux) LogUniform (−1,1)
cos(2θ) CHEOPS (days) Uniform (−1,1)
cos(3θ) CHEOPS (days) Uniform (−1,1)
X coordinate CHEOPS LogUniform (−1,1)
Y coordinate CHEOPS Uniform (−1,1)
Semi-amplitude (km s−1) Uniform (0, 100)
Spectrograph offsets (km s−1) Uniform (−100, 100)
Spectrograph jitters (km s−1) LogUniform (0.001, 0.2)

Notes. The normal distribution is defined by its mean and variance. The uniform and log-uniform distributions were defined with the lower and upper bounds of the distribution. The priors on the radial velocity offsets and jitters are identical for CORALIE and HARPS.

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