Activity cycle of ϵ Indi as traced by . The long-term variation of is phase-folded onto the estimated cycle period of ∼2600 days and modelled assuming a simple sinusoidal behaviour (dashed curve). The black dots represent HARPS observations, while the blue square represents the single-epoch, mean ESPRESSO emission level. The error bar on the latter is given by the standard deviation of the observations over the ESPRESSO campaign.