GLS periodograms of: (a) RV measurements from CARMENES VIS and MAROON-X data; (b) RV residuals after subtracting the inner planet signal at 1.88 d; (c) RV residuals after subtracting the two planet signals at 1.88 and 15.53 d; (d) RV residuals after subtracting the two planet signals plus a GP at ~41 d; (e-g) CRX, dLW, Hα, Ca II IRT₁, and Na I D₂ activity indices from the combined CARMENES VIS and MAROON-X data; (j-l) TiO7050, TiO8430, and TiO8860 activity indices from CARMENES VIS only. The “cp” in the residual models (panels a-d) corresponds to planets with circular orbits (see Sect. A.2 for a detailed explanation). In all panels, the vertical dashed blue lines correspond to the periods of the inner and outer planets at 1.88 d and 15.53 d, respectively. The orange shaded region corresponds to the stellar rotational period seen between 41 d and 44 d. The horizontal gray lines mark the theoretical FAP levels of 1% (dotted), 5% (dash-dotted), and 10% (dashed).