Light curves along the middle row of the maps shown in Fig. 1 (horizontal path at pixel 1000 on the vertical axis). Top panel: light curve for IPM drawn in blue, with the light curve of the combined method superimposed and plotted in red. Both curves are practically indistinguishable, and their differences (in green) are close to zero. Bottom panel: relative differences between the two light curves. The differences are normalised with the IPM map values. The relative difference signal has a noisy behaviour around zero, and the mean value of their absolute values is only 0.0029, i.e., 0.29%.