Velocity-averaged maps of the CO(6–5) emission of the counter-images E (left panel), C+D (middle panel), and B (right panel) of MACSJ0032-arc. Overlaid are the CO(6–5) contours integrated over, respectively, the channels that define the blue component (blue contours) and the red component (red contours) of the double-peaked CO(6–5) line profile shown in Fig. 7. The color-coding is in units of integrated flux Jy km s^-1 and starts at 2σ. Contour levels also start at 2σ and are spaced in steps of 1σ. A clear spatial offset between the blue and red contours is observed. The corresponding PdBI beam size of 1.94′′ × 1.62′′ is about the size of the individual counter-images themselves.