English: Figure 3: Combined and phase-folded light curves for all 13 nights of ULTRACAM data in 2019, and all 5 nights of data in 2020. The fluxes are phased with respect to the 25.02 h period, where zero phase in both cases corresponds to the first exposure obtained on 2019 March 24 (𝑇0 = 2458567.49292 BJDTDB). Both plotted curves are the result of co-adding and re-sampling nightly data into 4000 evenly spaced phase bins, which corresponds to a reduction in temporal sampling from 6 s to 23 s. The individual transiting features are remarkably coherent in both shape and phase over at least several nights, but their morphology can change drastically from one year to the next. Both curves shown are the average of either 𝑔- and 𝑟 -band, or 𝑔- and 𝑖-band data.