Fig. 51.

Cross-spectra between the three CMB channels, showing the non-linear distortion of strong signals (not corrected in SRoll). The auto-spectrum of the lowest noise 143 GHz channel is shown to illustrate the reduction of the systematic level brought by the use of cross-spectra. At ℓ > 300, quantization noise generates a rise not related to this test; hence that range of multipoles is not shown.
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