Generalized Lomb–Scargle periodograms of the residual RVs after subtraction of different models. Panel a: no signal subtracted, only instrumental offsets and jitter fitted. Panel b: periodogram of the RV residuals after the subtraction of one sinusoidal signal with P = 55.7 d (vertical purple dashed-dotted line). Panel c: periodogram of the RV residuals after the simultaneous modeling of two signals with periods at 3.93 d (red solid line) and 55.7 d. Panel d: periodogram of the RV residuals after the simultaneous modeling of three periodic signals with P = 55.7 d, P = 3.93 d, and P = 9.1 d (green dashed line). Panel e: periodogram of the RV residuals after the simultaneous modeling of four periodic signals with P = 55.7 d, P = 3.93 d, P = 9.1 d, and P ~ 87 d (blue dotted line). The gray dashed lines indicate from bottom to top the analytic 10, 1, and 0.1% FAP levels, respectively.