Posterior distributions of a parallel tempering ensemble MCMC sampling of the combined Kepler and WFC3 data with our planet-moon model. Top: results for the original data from Teachey & Kipping (2018). Bottom: results for our own detrending of the Kepler and WFC3 data. In both figures, scatter plots are shown with black dots above the diagonal, and projected histograms are shown as colored pixels below the diagonal. The most likely parameters are denoted with an orange point in the scatter plots. Histograms of the moon-to-star radius ratio r_s, scaled semimajor axis of the planet-moon system (a_ps∕R_⋆), satellite orbital period (P_s), satellite orbital phase (φ), moon-to-planet mass ratio (f_M), orbital inclination of the satellite with respect to our line of sight (i_s), and the orientation of the ascending node of the satellite orbit (Ω_s) are shown on the diagonal. Median values and standard deviations are indicated with error bars in the histograms.