Kepler data: time-dependent phase plot showing the dynamic changes in the phase-folded light curve. The analysis window is 19 days long, shifted by steps of 0.2 days. White areas indicate regions where the data coverage in a given window is less than 70%. The left panel displays the phase-folded light curve as a function of time, revealing temporal variations. In the right panel, we subtract the average phase-folded light curve (computed from the entire Kepler dataset) from each windowed phase-folded light curve to highlight the temporal variability. See the text for additional details.