(Top) Sample autocorrelation function of the same ellipticity chains as shown in Fig. C.1. The function dies off rapidly approximately as an exponential decay (shown as the analytic curve without error bands) with the same autocorrelation time. A small negative correlation at large lags is an indicator of fast convergence. (Bottom) Distribution of effective sample size for the same chains, whose mean is at about 14 (compare with N_MC = 200).