Fig. 2

Planck HFI 353 GHz (red, top) and
(blue, bottom)
power spectra (in μK
) computed on three of the selected
LR analysis regions that have fsky = 0.3 (circles, lightest),
fsky =
0.5 (diamonds, medium) and fsky = 0.7
(squares, darkest). The uncertainties shown are ± 1σ. The best-fit
power laws in ℓ are given for each spectrum as a dashed line
of the corresponding colour. The Planck 2013 best-fit
ΛCDM
expectation (Planck Collaboration XVI 2014) and the corresponding
r =
0.2
CMB model are shown as solid black
lines; the rise for ℓ> 200 is from the lensing contribution. In
the lower parts of each panel, the global estimates of the power spectra of the
systematic effects responsible for intensity-to-polarization leakage (Sect. 2.3) are shown in different shades of grey, with
the same symbols to identify the three regions. Finally, absolute values of the
null-test spectra anticipated in Sect. 2.3,
computed here from the cross-spectra of the HalfRing/DetSet differences (see text),
are represented as dashed-dotted, dashed, and dotted grey lines for the three LR
regions.
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