Same as in Fig. 1 for Mrk 142. The variance measurements have been calculated for T_max = 6 days. Solid orange lines show the model predictions when assuming M_BH = 2 × 10⁶ and the parameters in K21b (see Sect. 6.6), while the blue lines show the best-fit model for M_BH = 4 × 10⁶ and the parameters listed in Tables 1 and 3. The slope of the best-fit dashed black line is b = 1.1 ± 0.2. Grey points and solid black line as in Fig. 1.