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Fig. A.1


Left panel: median values of the photospheric activity proxy, Sph (in ppm), calculated for the 310 Kepler solar-like stars for which rotation periods were measured (García et al. 2014) as a function of the length in days of the applied filter F (red dots). The solid line corresponds to the associated fit from Eq. (A.1). Right panel: median values of the associated errors (in ppm) of the estimated Sph of the 310 Kepler solar-like stars as a function of the filter Nday (solid line). The red dashed-line corresponds to the difference in Sph between consecutive values of the filter Nday.

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