Raw flux variations for set-2 (see Table 1) and the resulting ensemble light curve (target flux over reference flux, ~ F1 /(F2 + F3), without outlier correction, normalized to its average). Stars 2 and 3 (see Fig. 1) serve as comparison stars. The eleventh-order polynomials, robustly fitted to the fluxes to handle outliers, are shown by green lines. The shaded area in the bottom panel indicates the period of intermittent clouds. The binned light curve (with overlapping bins – see text) is shown by yellow dots. The time axis is shifted to the moment of the first data point (BJD1).