Same as Fig. 2 for the fluxes of each sub-exposure normalized by the total flux that is measured during the transit and corrected for all trends as discussed (see text). Upper plot: transit #1. The overall fluctuation after correction is  ± 0.2%. Middle plot: same as upper plot for transit #2. Overall fluctuation:  ± 0.3%. Lower plot: same as upper plot for transit #3. Note here the different ordinate scale showing the relatively more perturbed transit #3. For that transit, the overall fluctuation is  ± 0.7%.