Illustration of how local stellar mass is derived, for the case of a typical moderate signal-to-noise case – the host of SNF20060912-004. Left: (g − i) color distributions: the histogram shows the likelihood distribution measured from the individual g and i magnitude distributions shown in the inset plot (where the open green histogram represents g and the filled brown histogram represents i). The dashed line shows the prior distribution and the filled blue envelope shows the reconstruction of the (g − i) posterior distribution. Right: the posterior distribution of the local stellar mass; the vertical grey solid line indicates the median of the distribution and the two dashed lines show the 16th and 84th percentile values.