WFI2033−4723 time-delay estimates. The colored points labelled “PyCS” represent the final time-delay estimates for each data set, obtained after combining the curve-shifting technique parameters following the marginalisation scheme presented in Sect. 3.1. The gray and black points, respectively labelled “PyCS-sum” and “PyCS-mult” represent the marginalisation and combination of the results obtained from the individual data sets. Indicated with small diamonds and dashed lines are the AB and BC delays taken from Morgan et al. (2018) and Vuissoz et al. (2008), respectively. The similar color between “PyCS -C2” and Vuissoz 2008 indicates that both measurement share the same data set, although less complete in the latter case (see Table 1). The values indicated above each measurement represent the 50th, 16th and 84th percentiles of the respective probability distributions.