Generalized Lomb-Scargle (GLS) periodograms of the combined CARMENES and HIRES RVs measurements and the residual RVs after subtraction of different models, a) GLS of RV dataset. b) GLS of the RV residuals after fitting the 13.6 d signal (vertical magenta line), c) GLS of the RV residuals after simultaneously fitting the 6.6d (vertical green line) and 13.6 d signals, d) GLS of the RV residuals after simultaneously fitting the transitting planet (P = 0.926 d, vertical red line), 6.6d, and 13.6d signals, e) Window function. The 10%, 1%, and 0.1% FAP levels are indicated by grey dotted, dash-dotted, and dashed lines, respectively.