Activity-only model. Top panels: combined FWHM time series of ESPRESSO and CARMENES with the best fit model. Right panel: zoom to the latest ESPRESSO campaign. Middle panels: combined RV time series of ESPRESSO and CARMENES with the best fit activity-only model. Bottom panels: residuals after the activity-only fit of the RV time series of ESPRESSO and CARMENES. Right panel: GLS periodogram of the residuals. The computation of the periodogram uses the offsets and the jitters estimated for model 0-Planets in Table B.1.