Comparison of power spectra residuals from different high-ℓ likelihood codes. The figure shows “data/calib − FG −Plik _CMB”, where “data” stands for the empirical cross-frequency spectra, “FG” and “calib” are the best-fit foreground model and recalibration parameter for each individual code at that frequency, and the best-fit model Plik _CMB is subtracted for visual presentation. These plots thus show the difference in the amount of power each code attributes to the CMB. The power spectra are binned in bins of width Δℓ = 100. The y-axis scale changes at ℓ = 500 for TT and ℓ = 1000 for EE (vertical dashes).