Left: unbinned ground-based follow-up transit light curves of HATS579-037. Plots as for Figure 2. The over-plotted model is based on a global fit of all available data, and accounts for differences in limb darkening between the R- and i-bands, but assumes all other light curve parameters are the same. The poor fit of this model shows clear differences in the observed transit depths between the R-band and i-band observations, which allow us to classify this candidate as a eclipsing binary.