Channel maps (82 km s⁻¹ width) for the CO (2-1) emission line from about − 300 to + 400 km s⁻¹, relative to the systemic velocity. The maps show the clear velocity dependent structure of the line surface brightness distribution. Each map covers a sky area of 12.8′′ ×12.8′′ and the linear intensity-scale ranges from − 0.04 to 0.2 Jy beam⁻¹ km s⁻¹. The systemic velocity corresponds to a redshift of z = 0.654, and is in the LSRK frame using the radio definition of the redshift. The synthesised beam has a size of 0.44 × 0.36′′ at a position angle of 60 degrees east of north, and is shown in the bottom left-hand corner of each map as the white ellipse.