Cumulative FFDs in the HST-COS FUV bandpass. Left: Observed data (panel ‘a’), a representative synthetic distribution generated by the YMDF model (panel ‘b’), and a representative synthetic distribution generated by the ‘fiducial flare’ model (panel ‘c’). These synthetic distributions correspond to the AU Mic observation period in FUV (∼11.7 hours). Panel ‘d’: Synthetic distributions produced over the AU Mic FUV observation period. The bars are coloured consistently with those in the preceding figure, except for corresponding to AU Mic observation period in FUV.