Modelling of data obtained on TOI-1296b. (Top) The TESS light curve in 30-min and 2-min cadence, and ExoFOP ground-based light curves; (bottom) The SOPHIE data series of RV versus time and folded RV data, together with the best-fit model (the time unit for the RV time series is BJD_UTC). In all panels, blue data points with error bars show the observed data. Black lines and intervals in grey show the model median and the 68.3% credible interval computed from 1000 random posterior samples. Grey lines show the maximum a posteriori transit model. The blue points associated with those grey lines are the data points corrected for the best-fit Matern kernel. For the ground-based light curves, the observatory name and filters used for observations label the relevant plot.