Evolution of relevant parameters as a function of the number of pulsations considered to remove from the data. From top to bottom: the phase curve coefficients, c₁ and c₂, are shown as green points; the scaling factor and its injected counterpart are plotted as blue triangles and black circles, respectively,see text for details; and two statistics, the BIC as red circles and the standard deviation of the residual light curves as black squares, which was enlarged by a factor of 5 for better visualization.