Upper panel: the best-fitting χ² values are plotted against the actual time of TDE from 2010 July 14 to 1994 June 29 (or ∼0–16 years before 2010 July 14). The yellow solid circles represent the best-fit value of t_D at which the decay index is ﹩\alpha =-5/12﹩, −19/16 and −5/3, respectively. Lower panel: the same as top, but for the best-fit power index at each t_D.