Extraction of the first multipole modes from the maps in Fig. 2. The multipoles are estimated outside the Planck common mask. Left column: multipoles of the Planck SMICA CMB map. Right column: multipoles of the foreground model map. From top to bottom: ℓ = 2 (quadrupole), ℓ = 3 (octopole), ℓ = 4, and ℓ = 5 modes. The grey lines serve to aid a by-eye comparison of the position of cold and hot spots between the maps based on the pixels with temperatures close to zero in the CMB map.