As Fig. D.1, but for the starburst phase of each system. The weighted Pearson correlation value for the top panel is found to be 0.71, while the lower panel indicates two behaviours with a less clear trend (overall correlation of 0.39) – see text for details. As SSFR is estimated in the burst phase using t_SB and M_* rather than being determined independently, it is not physically meaningful to include it here.