Planck early results
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Fig. 8

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Effective beam window functions (b) from FICSBell (black) and FEBeCoP (red) at 545 GHz (see Sect. 3.2 for more details). The six FEBeCoP beam window functions from each field are superimposed (red lines). Also shown for comparison is the Gaussian beam with a FWHM of 4.72′ ± 0.2′ (green lines), which is the equivalent FWHM of the beam determined on Mars.

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