Central 53 × 53 kpc (9 × 9 arcmin) of the integrated HI emission map of CIG 96. Column density is indicated with a colour gradient. Contours indicate 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13 and 14 × 10²⁰ at cm⁻². The black crosses indicate the central position of the 33 apertures used to measure the colours of the pseudo-ring (see Sect. 4.3.1). The magenta ellipse indicates the position of the southern feature indicated with a cyan arrow in Fig. 9, left panel, the g - r colour index image. The yellow circle at the bottom left indicates the HI image synthesized beam of 28″ × 28″.