Modeling of the stellar activity of α Cen B, as performed by the bp and oc methods. Top panel: signal due to stellar activity as estimated by the bp method (blue crosses) and by the oc method (red triangles) superimposed to the time series (black circles) of α Cen B. Bottom panel: ∆RV^* as computed by the bp method (blue crosses) and by the oc method (red triangles). The black circles on the background show the original time series, enabling a visual comparison of the improvement achieved by the bp method in the data correction. The change point locations (Table 3) are displayed in both plots as vertical orange dashed lines.