GLS periodograms of the window function (top panel), RVs (middle), and residual for the one planet model (bottom) for GJ 724 using CARMENES and HARPS data sets. The period of the planet, GJ 724 b, is highlighted by the solid red line, whereas its aliases at 1.24 d and 0.83 d are marked with dashed green and magenta lines, respectively. Additionally, we depict the mean rotation period of 57 d determined from the photometry and its harmonic P_rot/2 by the dot-dashed blue and orange lines, respectively.