SMICA weights for temperature (top) and polarization (bottom). For readability, the values are shown for input maps in units of antenna temperature. The plot goes up to ℓ ≃ 3600, but the output maps are synthesized using all multipoles up to ℓ = 4000. For polarization, the thick solid lines show the contribution of input E-modes to the CMB E-modes and the thick dashed lines show the same for the B-modes. The thin lines, all close to zero, show “cross-contributions” of input E-modes to the CMB B-modes and vice versa.