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Fig. 5
Top: false colour TNG V-band image of UGC 4277 from Bianchi (2007). Bottom: H i contours overlaid on the same V-band image. Contours start at 3.61 × 1020 atoms cm-2 and increase as 2, 4, 6, 8, and 10 times this value. North is up, east to the left.
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