The distributions of (T, β) values for data containing calibration errors where either 160 μm data (first six frames) or the 350 μm data (six last frames) has been scaled by 1.1. The methods are χ², BM, HM, and HMC, the last one corresponding to a hierarchical model that includes free parameters for multiplicative corrections in three bands. Each frame corresponds to one combination of method and statistical noise, as indicated in the frames. The single contour corresponds to the locus of the correct solution (see Fig. 17).