As B.1 but for Combmod using the variable prior and the new Combmod-α classifiers. (a) Unadjusted confusion matrix computed on the cleaned validation data set of 1 421 155 sources for Combmod-α with {α_quasar=1.0, α_galaxy=0.6, α_star=0.5}, using the global prior. (b) Unadjusted confusion matrix computed on the cleaned validation data set of 1 421 155 sources for DsC Combmod after application of the continuous variable prior. (c) Unadjusted confusion matrix computed on the cleaned validation data set of 1 421 155 sources for Combmod-α with {α_quasar=0.6, α_galaxy=0.6, α_star=0.5} after application of the continuous variable prior.