Fits to the CD of M_ZAMS of SN II progenitors in the gold sample. Left panel: CD of M_ZAMS derived in our work for the gold sample (yellow triangles and error bars), corresponding to the median and the 68% confidence limit of the distribution presented in Fig. 4 as shaded contours, in comparison with the model CD constructed with the median values of the marginal distributions of the parameters (shaded contours). Right panel: corner plot of the joint posterior probability distribution of the parameters. Dashed lines indicate the 16th, 50th, and 84th percentiles of the distributions.