Illustration of the quality requirements applied to flag a period as reliable. Top panel: full G time series for the star Gaia DR3 6428392592628180864. The dark segments enclose the subseries extracted by the segmentation algorithm. The period search algorithm detected the periods P = 24.613 d and P = 4.708 d in first and fourth segments, respectively. Middle panel: first subseries folded according to the period P = 24.613 d. Though the FAP associated with the period is below the rejection threshold, the period is discarded because of the low PC and high MPG values. Bottom panel: fourth subseries folded according to P = 4.708 d. In this case, the detected period is flagged as valid because the subseries exhibits an excellent phase coverage (PC = 0.8) and a very small phase gap (MPG = 0.29).