Posterior of the transit models for each epoch and band (Sect. 3, TTV analysis with a single R_p/R_★), with the median represented as a black line and the 68% credible interval shown in various colors corresponding to Fig. 1, excludes epoch 16. Each transit is centered relative to the MAP value of the linear ephemeris derived in Sect. 4.1. The horizontal error bars indicate the mid-transit time offset from the linear ephemeris, shifted vertically, with time increasing from top to bottom.