[CII] channel map with an overlay of the identified rings around the five candidate positions from Fig. B.3. The ring radii vary with velocity. The plotted rings are narrower than the rings used in the convolution. Different ring positions are encoded in a different ring color. The positions in panels 1–5 from Fig. B.3 correspond to the colors magenta (A), orange (B), grey (C), white (D), and cyan (E).