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Fig. 1

Top row: images of SDC18, with Spitzer 8 μm images in yellow, followed by the 1.2 and 2.0 mm NIKA images, slightly smoothed to 13 and 20′′ -resolution, respectively. Bottom row: as above for SDC24. The contours on the 8 μm images show where S∕N = 3 from the 13′′-resolution 1.2 mm images.
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