RV time series phase-folded on the rotation period (4.36 days), comparing contrasted and anti-contrasted lines. Time series using 7180 lines with C>1.05, which behave similarly to a “regular spot” that hides a part of the photosphere, shown in black (RMS = 13.7m/s). Time series using 9464 lines with C<0.95, which behave similarly to an “anti-contrasted spot”, adding more spectral information than the photosphere, shown in yellow (RMS = 19.1 m/s).