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TE Power Spectrum
The angular power spectrum of the temperature-polarization correlations is computed using a quadratic estimator. ClTE is computed individually for each WMAP frequency band, using uniform weight for the temperature map and noise weight for the polarization maps. The power spectra are then combined using noise-weighted QVW data for l > 21 where foregrounds are insignificant, and a fit to CMB plus foregrounds using all five frequency bands for l ≤ 21.
The TE power spectrum data are provided as a table containing the following three columns:
The diagonal elements provide an estimate of the error, but should not be used as exact error bars. The complete Fisher matrix should be used for that purpose.
A binned version of the TE power spectrum is also available in a separate file whose format and content are similar to those described above for the unbinned data. The choice of l bins is the same as that used in e.g., Figure 7 of Kogut et al. (see below).
More details can be found in: