Fig. 1.

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Primary beam corrected flux-density H I emission detected by MeerKAT within a 1.5 × 1.5 deg2 field centred on NGC 1566 (the imaged f.o.v. is marked by the dashed grey circle), overlaid on the DECaLS optical image in the g, r, z filters. The H I emission is a composite of flux-density maps derived from the multi-resolution datacubes. The resolutions shown by coloured contours are 12″ × 10″ (red), 25″×18″ (green), 32″×23″ (blue), 65″×64″ (purple), 94″×92″ (yellow-green). For resolutions between ∼90″ and 25″ two contours are shown, i.e., NH I = 3σ × 2n with n = 0, 2. The 12″×10″ resolution has further increasing contours (n = 0, 2, 4...). The PSF of the multi-resolution maps are shown in the bottom-right corner with the same colour coding. Details on the H I properties of the sources in the field are given in Table A.2.
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