Left panel: the velocity-integrated map of the CO(6–5) line of the DLA host galaxy (indicated by a white arrow), located about −6.3, +2.2 arcsec offset from the quasar position (red star). Contours are 2, 3, 4, 5σ, 1σ = 5.1 μJy/beam. Middle panel: a zoomed view onto the DLA emission. Right panel: the spectrum extracted from the region with ≥2σ. The red curve is the fit to the CO(6–5) emission, while the red vertical mark corresponds to the redshifted frequency of the CO(6–5) line expected at the redshift of the DLA. The dashed magenta lines show the range where the line emission has been integrated to produce the velocity-integrated map (left panel).