Planck 2018 results
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Fig. 4.

image

Planck 2018 lensing reconstruction band powers (values and multipole ranges are listed in Table 1). Left: minimum-variance (MV) lensing band powers, shown here using the aggressive (blue, 8 ≤ L ≤ 2048) and conservative (orange, 8 ≤ L ≤ 400) multipole ranges. The dots show the weighted bin centres and the fiducial lensing power spectrum is shown as the black line. Right: comparison of polarization-only band powers using homogeneous map filtering (blue boxes, with dots showing the weighted bin centres) and the more optimal inhomogeneous filtering (orange error bars). The inhomogeneous filtering gives a scale-dependent increase in S/N, amounting to a reduction of 30% in the error on the amplitude of the power spectrum over the conservative multipole range shown. The black line is the fiducial lensing power spectrum.

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