Fig. A.2
Fourier amplitude profiles of the 1.2 mm (top) and 2 mm (bottom) data in the frequency domain. The profiles are obtained by averaging in rings of 1 pixel in width at different distances from the center of the Fourier transformed emission maps. The profile at 2 mm is used to derive a mask, which is applied to the Herschel/SPIRE data in order to filter out the large-scale emission.
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