Posterior mean total data-minus-model residual maps (r_ν = d_ν − s_ν) in Q (first column) and U (third column) for all included WMAP bands in the two left-most columns, at N_side = 16, masked with the processing mask applied in the pipeline. The second and fourth columns show corresponding transmission imbalance template maps for one of the differencing assemblies (e.g., Q{1, 2}, V{1, 2}) per residual as derived by Jarosik et al. (2007); we note that these templates are each associated with an unknown scaling amplitude that may take either sign.