Planck 2018 results
Free Access

Fig. 21.


Scatter plots of LFI angular cross-spectra around the first acoustic peak for frequency pairs: left: 70 GHz and 30 GHz; middle: 70 GHz and 44 GHz; right: 44 GHz and 30 GHz. The solid line is the linear fit obtained accounting for error bars on both axes. Slopes, within expected uncertainty, show good consistency among data sets

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