LC of the best candidate. Top: Fermi/GBM bn170207906 is the best candidate for a periodic recurrence of peaks: 17 out of a total of 25 peaks (red circles) belong to the same phase bin (vertical green regions) out of 5 phase bins, corresponding to a period of 0.419 s. The p value is 3 × 10⁻⁴. The solid orange line is the probability per unit of time, Ψ(t) (arbitrary normalisation), used to generate fake peaks to estimate the statistical significance. The panels from second top to bottom are close-in views of three different portions of the total LC shown in the top panel.