Lomb–Scargle periodograms of the RV (upper panel) and RV residuals (lower panel) time series (including HARPS-N and SOPHIE data). The frequency corresponding to the period of the transiting planet is indicated by a blue dotted vertical line. The frequency of the maximum peak is highlighted with a thick yellow vertical line. The RV residuals are issued from the best-fit model (see Sect. 4.1). The levels of the false alarm probabilities, derived through a bootstrap analysis, are indicated with horizontal dashed lines.