Example of a transit parameter fit for a PLATO-like light curve. (a) Simulated 80-day light curve for 16 Cyg B using the PLATO Solar-like Light-curve Simulator. The grey curve shows the original light curve, and the purple shows a running mean average. (b) Zoom in on a single transit event. The purple data points are used to train and condition the GP, while the yellow data correspond to the masked transit. Also shown is the mean GP prediction, and the one, two, and three standard deviation confidence bands. (c) Posterior distribution for the transit parameter, p, using the GP predictive distribution as likelihood. The grey lines represent the true values.