Two-parameter joint posterior distributions for the stellar density and planet eccentricity for three different analyses (photometry only; joint radial velocity and photometry; and joint radial velocity and photometry with a stellar density prior computed from the stellar radius and mass derived in Sect. 2). The 39.3% and 86.5% two-variablejoint confidence regions are denoted by a thick and a thin line, respectively. Histograms of the marginal posterior samples are presented at the top and at the right (for the eccentricity, the radial velocity-only analysis is also shown).