Comparison between DL and MBB A_V estimates, denotedA_V,DL andA_V,MBB respectively. The top row shows the ratio of theA_V,MBB andA_V,DL maps. The polar projection maps are smoothed to 1° resolution to highlight the systematic departures. The bottom row shows the ratio of theA_V,MBB andA_V,DL estimates as a function of theA_V,DL estimate (left) and its histogram (right). In the bottom left panel the colour corresponds to the logarithm of the density of points (see Fig. 5). The curves correspond to the mean value and the ± 1σ dispersion. TheA_V,DL andA_V,MBB values used in this comparison are derived from a fit of the same data sets.