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Table 3

Prior distributions for the joint photometry and RV analysis of Gaia-1b and Gaia-2b.

Parameter Description Units Prior

Gaia-1b Gaia-2b
P Period days
T0 Time of mid-transit BJD - 2455197.5
K Semi-amplitude of the radial velocity m s−1
e Eccentricity 0–flxed 0–flxed; (i)
ω Argument of periastron degrees 0–flxed 0–flxed; (i)
ρ* Stellar mass mean density kgm−3
r1,r2 Parametrization of p, b(ii)
q1,Gaia, q2,Gaia Limb-darkening parametrization(iii) for Gaia
DGaia Dilution factor for Gaia 1–flxed 1–flxed
q1,TESS,q2,TESS Limb-darkening parametrization(iii) for TESS
DTESS Dilution factor for TESS
γ Relative center-of-mass velocity for PEPSI(iv) m s−1

Notes. We denote uniform distributions between a and b as and normal distributions with meanµ and variance σ2 as .(i) Separate analysis, allowing eccentricity. (ii) Described by Espinoza (2018); p = RP/R* is the planetary to stellar radius ratio, and b = (a/R*)cos i is the impact parameter. (iii) Described by Kipping (2013).(iv) Around a middle value of −37 750 for Gaia-1b and −36 000 for Gaia-2b.

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