Upper panel: full light curve of the star KIC 1163579 from quarters Q1–Q14. Middle panel: zoom into the above light curve. Periodicity and the existence of a second period is clearly visible, revealed by the double-dip structure around 550 days. Lower panel: periodogram of the full light curve. Significant peaks are marked in red, other peaks in the range of P₁ ± 30% (indicated by the dashed blue lines) are marked in blue.