Temperature and polarization maps from simulation. Columns show, from left to right, the Stokes T, Q, and U components. Rows show, from top to bottom, (1) Gibbs map: the mean of maps from the Gibbs chain, as evaluated from 900 samples; (2) absolute residual error as evaluated as the difference between the Gibbs map and the noise-free map; (3) the difference between the Gibbs map and the Madam map derived from the same data set; (4) residual error in Madam for a simulation that does not contain bandpass (i.e., a simulation with same input foreground map for all radiometers) evaluated as the difference between the Madam map and noise-free map; and (5) the difference between the Gibbs map and the maximum-likelihood map.