Planck 2013 results
Free Access

Table 3

Percentage increase of the power spectrum of the difference of half-ring maps needed to correct the bias of the noise level estimate in frequency maps.

Frequency [GHz] Fractional change [%]

100 0.53 ± 0.08
143 0.61 ± 0.08
217 0.75 ± 0.09
353 0.44 ± 0.09

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