Analysis of the rotation signal. Left: RV, FWHM, Hα, S_mw, and NaD time series with their respective model of the long-term signal and the rotation signal. The shaded regions indicate the 1σ confidence band of the GP model. Center: posterior distribution for the periodicity of the rotation signal. Right: periodograms of the residuals after subtracting the model. The blue, green, and red horizontal lines indicate the 0.1, 1, and 10% FAP levels, respectively. The highest peak of the periodogram is marked with a blue shaded area.