Scatter plots of the 2001 Modal 2 coefficients for each combination of component-separation methods, labelled with the R² coefficient of determination. The figures on the left are for the temperature modes and those on the right for pure polarization modes (the Modal 2 pipeline reconstructs the component of the EEE bispectrum that is orthogonal to TTT, so this is not exactly the same as the EEE bispectrum of the other estimators).