Phase and amplitude as a function of the time centre of the window t₀, as described in Sect. 2.2 (solid red and green lines, respectively). Markers correspond to statistically independent estimates. Dashed red and green lines represent the average phase and amplitudes. The figures are all computed for a timescale of τ = 539 days, corresponding to τ∕T_obs = 1∕9. Plots (a), (b), (c), and (d) correspond to base models that include offsets, linear activity indicators, and all the claimed planets except the 5, 7, 10, and 25 day planets, respectively.