SOPHIE RVs and optical activity indicator. Left: time series; middle left: data folded at the P_rot of 34.4 days; middle right: correlation with the RVs where the red line depicts the linear correlation between both quantities; right: GLS periodogram where the horizontal dashed black line indicates the FAP level at 1% and the vertical color lines mark the P_rot at 34.4days in yellow, the first harmonic at P_rot/2 in light blue, and the time range of differential rotation in light green.