GLS periodograms of various parameters derived from the HARPS data: RV measurements, FWHM of the CCF, BIS, contrast, Hα index, log$R_{HK}^{\mathrm{\prime }}$ index, S-index, Na ID₁, and Na ID₂, juxtaposed with the respective window function to scrutinize potential alias signals. A vertical red line is annotated to denote the frequency corresponding to the period of the planet (8.15 d). and the blue line corresponds to the rotational period of the star (37.4 d).