Distribution of the fitted masses (left panel) and rms of the residuals vs. the reference rms (right panels) for a selection of methods (numbers in Table B.1). This corresponds to the follow-up realisations for G2 stars, a planet mass of 4 M_Earth, the middle of the habitable zone, and a lower spot contrast. The distributions show the reference mass distribution from Sect. 3 (dotted line) and the tested methods (solid lines). For the GP method (7), the results for the analysis performed on the original series are shown as solid black lines, while those corresponding to the analysis performed on the residuals from Sect. 3.2 are shown in green. The vertical solid lines in the left panels correspond to the average mass estimate for the corresponding distribution.