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Fig. 1

870 μm emission of Gum 31. The contours go from 150 mJy beam-1 (~3σ) to 650 mJy beam-1 in steps of 100 mJy beam-1, and from 650 mJy beam-1 in steps of 200 mJy beam-1. The maximum flux density is 1860 mJy beam-1.
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