Posterior TTV predictions of planets b (blue band), c (orange band), and d (green band) computed relative to a linear ephemeris (Table D.3). A thousand random draws from the posterior distribution were used to estimate the median TTV values and their uncertainties (68.3% confidence interval). The upper panel shows the posterior TTV values and compares them with the individual transit-time determinations (Table D.2, error bars). In the lower panel, the posterior median transit-timing value was subtracted to emphasize the uncertainty in the distribution and facilitate a clearer comparison with the individually determined transit times.