Mean CMB temperature in radial bins around voids: the black line shows the temperature taken from the largest quartile and the yellow line the one from all open nearby voids in the Planck SMICA CMB temperature fluctuation map with the quadrupole removed. Each bin is taken as 1/5 of the void radius. The grey bands show the 67%, 95%, and 99.7% confidence intervals based on 10 000 simulated maps for the largest quartile of voids and the dashed yellow line shows the corresponding 95% interval for the sample of all voids. Note that the profiles are only taken around voids with a central weight of > 0.5 in the void weight map (Figure 3), ensuring that the voids used for measuring the profile are flagged as a void in most random realizations of SPARKLING as well as in REVOLVER.