Integrated H i emission contours (white) overplotted on a SDSS r-band images. Left: integrated emission contours from the low resolution H i map, (beam size = 45.57′′× 41.35′′) where the H i column density levels are 10²⁰ atoms cm^-2× (0.5, 1.2, 2.3, 4.7, 7.0, 9.3, 11.6, 14.0). Right: integrated emission contours from the high resolution H i map, (beam size = 26.08′′× 19.97′′) where the H i column density levels are 10²⁰ atoms cm^-2× (1.6, 3.2, 6.3, 10.6, 19.0, 25.3). The first contours are at the 3σ level. At the bottom left of each panel a black ellipse shows the beam size. The optical centre of the galaxy is marked with a grey cross.