ALMA spectra for the CO(1−0) emission in select regions using 30 km s⁻¹ for the channel width. The region choices were informed by the channel maps in Fig. B.1. The lighter blue lines indicate the per channel rms at 2σ. The yellow dashed vertical line indicates the expected location of the CO(1−0) line for a redshift z = 0.1555. For each spectrum, the outset image on the right shows the CO intensity (Fig. 4) with contours in black starting at 2σ, incremented in 1σ intervals. The red outline in each outset panel shows the region for which the spectrum has been extracted. First row: full ALMA spectrum of the CO emission detected at > 2-σ in total line intensity. The peak of the line emission is offset in velocity by ≈ − 150 km s⁻¹. We note that the intensity scale of the full spectrum differs in this panel. Second row: core region corresponding to the BCG shows a nearly symmetric velocity distribution that can be described by a double Gaussian fit. Third row: South-western region, corresponding to the Hα spur and the peak of the X-ray emission seen in Fig. 3, shows a strong peak offset by ≈ − 150 km s⁻¹. Fourth row: Western region corresponding to the residual seen in the GMRT radio emission in Fig. 5 shows a weak peak at ≈ + 70 km s⁻¹.