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Fig. A.1
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Herschel column density map, with the area of each figure indicated. A white box indicates the area shown in Fig. 2. A green polygon indicates the area shown in Fig. 4a and Fig. 4b. A yellow box indicates the area shown in Fig. 7a, Fig. 7b, and Fig. 7c. A cyan box indicates the area shown in Fig. 4c and Fig. 4d.
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