RV residuals versus time after subtraction of the models (upper panel), based on the S-index (black), on the ff (red), and on |B|_disk (brown). The dashed vertical lines indicate the time of instrument warm-up, and the dotted vertical line the time of power failure which is before day 8100 (Dumusque et al. 2021). The middle panel shows the S-index residuals scaled to RVs (based on ff in black and on |B|_disk in green), on the same scale than the upper panel. The RV residuals based on the S-index model (in black) are compared to the BIS residuals (in red) in the lower panel.