Extended Data Fig. 5: Posterior probability distributions of transit parameters.

This ‘corner-plot’ shows correlations between pairs of parameters in our MCMC transit fit (with circular orbits enforced) and histograms of the marginalized posterior probability distributions for each parameter. For clarity, we have plotted correlations with the inclination angle i instead of the fit parameter cosi and subtract the median time of transit (t_t). The orbital inclination i, scaled semimajor axis a/R⁎, and the planet–star radius ratio R_p/R⁎ are strongly correlated, owing to the grazing transit geometry, but constrained by the prior on the stellar density. We do not include rows for the GTC and Spitzer photometric jitter terms because these are nuisance parameters that showed no correlation with the other physical parameters.