Planck 2013 results
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Fig. 14

image

Ratio of the mean noise angular power at high- (1150 ≤ ≤ 1800) to the white noise estimate from white noise covariance matrices. The half-ring differences are hit-count-weighted. One hundred and one full noise MC maps were made. The binned white noise is from the noise MCs. The “reference” white noise levels (green) are 9.8 × 10-15K2, 13.1 × 10-15K2, and 10.1 × 10-15K2, for 30, 44, and 70  GHz, respectively. In the noise MCs, no errors were propagated from Tables 9 and 10; only the median values of the three noise parameters were used. Therefore the error bars in the noise MCs represent only the statistical variance in the 101 realizations. If the uncertainty of the estimation of the three noise parameters were propagated to the noise MC, the error bars would be much larger.

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