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Fig. 6

image

First two rows: percentage of polarization intensity power lost when different high-pass filters are applied to the TOD as function of the cut-on frequency fc. Second two rows: fractional difference of the polarization S/N between the cases with and without high-pass filters as function of fc. The fractional difference is calculated as (S/NfilS/Ntot) × 100 /S/Ntot, where S/Nfil and S/Ntot refer to the cases with and without filters. We note that the polarization signal intensity is extracted directly from the plots of Fig. 2. The cut-on frequency fc is set to vary from 0.001 Hz to 50 Hz. First column: HWP stepping every 1 s (solid black line), 60 s (dotted red line) and 3600 s (dashed blue line), for a telescope scanning at 12 deg/s and 0.7 deg/s. Second column: HWP spinning at 5 Hz (solid black line), 2 Hz (dotted red line) and 0.5 Hz (dashed blue line), for a telescope scanning at 12 deg/s and 0.7 deg/s.

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