First plot: radial temperature profiles (top panel) of the stacking of Gr08 voids, done on WMAP Q, V, and W maps (both in native resolution and smoothed by a 30.6 arcminutes kernel). The differences in the profiles between the smoothed and original maps are plotted below the main plot (middle: V band; bottom: W band). The width of the shaded curves corresponds to the statistical errors on the profile measurements. Second plot: same graphs and legend as above but for the aperture photometry profiles of the stacking of Gr08 voids.