Robust RMS of the raw light curves, with the stellar activity filtered, before (blue) and after (red) jitter correction in C3. We show the median of the RMS in bins of 0.5 mag as large circles and the lower RMS envelope computed with the 0.05 percentile with the respective colour code. We also show the median of the light curves estimated uncertainties assuming only white noise (green line) for comparison with other figures.