Periods P1 and P2 observed in different campaigns for the same star for hpeak > 0.3 (left panel) and hpeak > 0.5 (right panel). The 1:1 ratio (solid black line), and the 1:2 and 2:1 ratios of the periods P1 and P2 (dashed black lines) are shown for guidance. Green dots show stars with a period deviation less than 20%.
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