Periodograms of the activity indicators derived from the HPF spectra and the photometric data from TESS. The first three plots show the periodicity in the signals of the calcium triplet lines. The fourth and fifth panels show the periodograms for the differential line width from SERVAL and the TESS photometry, respectively. The horizontal yellow line indicates the 0.1% FAP threshold and the vertical black line shows the location of the potential planet signal in the RVs of S1429.