Fig. 23

Calibrated noise spectrum for one bolometer in each HFI frequency channel. The spectrum is the average of all valid ring spectra of the second survey. The comb-like structure of absorption features occurs at multiples of the spacecraft spin frequency (16.7 mHz), and is due to the signal removal procedure. At 10 Hz and above there are some residuals of the 4-K cooler lines only associated with this particular computation.
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