Phase-folded RV data sets of EV Lac when using the full mask and the 10th, 5th, and 1st percentile sub-masks on all the epochs with a 2σ_NARVAL synthetic planet (red dashed line). The raw RV data sets phased at the stellar rotation period (upper panel) and the residuals to the sinusoidal fit phased at the planet orbital period (bottom panel) are illustrated. The planetary signal is clearly recovered when using the three percentile sub-masks, whereas the variability of the data set associated with the full mask does not enable a reliable recovery.