Planck 2013 results
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Fig. 3

image

Evolution of the fraction of the flagged data per bolometer averaged over a channel for the six HFI channels. A running average over 31 pointing periods (approximately a day) is shown. The general decrease of the fraction of flagged data comes from the increase in the solar activity and the correlated decrease of the cosmic ray flux. The sharp peaks are due to solar flares.

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