K2 light curve (upper panel) and stellar activity component in the radial velocities (lower panel; TERRA data for the last two seasons. DRS data show a similar behaviour), folded at the stellar rotation period. The reference epoch corresponding to phase = 0 is the same for both datasets. Light curve goes from May, 30th to Aug, 21st 2014 (K2 campaign C1). Spectroscopic data are distinguished according the observing season: black dots are used for data collected in 2017, red dots for those of 2018.