Same as Fig. B.1, but with a nonparametric SFH instead of two single star bursts. Since we concluded that the IMF is not important for our analysis, here we only show the case where a Kroupa IMF is adopted. The gray contour represents the case where both B/R and SED are used as constraints. Mass 1-5 corresponds to the mass formed in the 5 age bins of 1 − 5 Myr, 5 − 10 Myr, 10 − 50 Myr, 50 − 250 Myr, and 250 Myr−1 Gyr, respectively. The MCMC here corresponds to the results shown in Fig. 7 and Fig. 8.