Top panel: distribution of the semi-amplitudes of rotation induced RV signals the for the stars in our sample. The grey area shows the full sample, while the red area highlights the fraction of new measurements. Bottom panel: semi-amplitudes of rotation induced RV signals against the color B–V of the stars. Early M stars refer to M0 to M3 stars, mid M stars are M3.5 to M6 stars. The Sun value is included as a reference point.