Phase-folded TESS transit light curves for TOI-1130 b (left) and for TOI 1130 c (right) accounting for the transit timing variations. The best-fit PyTTV transit model (see Sect. 3.4) is overplotted for both TOI-1130 b and TOI-1130 c color-coded in salmon and blue, respectively. The upper panels show the light curves from Sector 13 observed in the 30-min cadence mode (black points) and the lower panels show the light curves from Sector 27 observed in the 20-s cadence mode (grey points) with a binning of 20 min (black points). Residuals are shown beneath each plot.