Phase-folded light curves for each of the eclipsing components and its sinusoid model. The light curve (grey) for each is the residual between the normalised, detrended light curve and every frequency except those forming the sinusoid model. See the main text for a discussion of the high frequency oscillatory signal present in the 8.65d model and the apparent discrepancy with Hełminiak et al. (2017) in the lower two panels.