Top-left: R-band image (from Gil de Paz et al. 2003). Top-right: total H I map at 10′′ resolution. The contour values are 1.7, 3.4, 6.8, 13.6, 27.2 × 1020 atoms cm-2. Bottom: channel maps at 10′′ resolution. Contours are at 1.5, 3, 6, 12, 24 × σ, where σ = 0.66 mJy/beam (~2 × 1019 atoms cm-2). In each panel, the cross and the circle show the galaxy center and the beam size, respectively.
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