Peak-power distributions of the random permutations of the residuals to the successive multi-Keplerian models. The peak power of the actual data is shown as a full vertical line, while 10%, 1% and 0.1% thresholds are shown as dashed lines. From left to right and top to bottom, the peak power corresponds to periods of 50 d, 5.8 d, 122 d, 2200 d, 16 d, 600 d and 1.18 d. The first five signals have extremely high significance, while the 6th and 7th signals have 0.6% and 1.4% FAP, respectively. Nothing significant remains after subtracting the seven-Keplerian model.