Light curves of SGR J1935+2154. For each burst, only the detector with the smallest viewing angle to the source direction is used for its light curve plot. The energy range is 8–200 keV. The gray, blue, and red lines denote the count rates light curve, bayesian blocks, and background, respectively. The black and green vertical dashed lines show time intervals of T_bb and T₉₀. Bottom right: the light curve of the FRB-associated burst observed by HXMT in the energy range of 1–250 keV (Li et al. 2020).