Left: distribution of MCMC states for the derived quantities ecosω and esinω as obtained from 1 MC chain of 10⁷ steps (red) and the combination of 10 chains of 10⁷ steps each (black). Only 1% of the steps are included in this plot to improve visualization. Right: marginalized probability distribution of the eccentricity is shown in black (arbitrary normalization). The corresponding cumulative distribution (red histogram) shows that eccentricities higher than 0.23 are ruled out at a 95% confidence level.