Source plane CO(6−5) masked and unmasked moment-0 and moment-1 maps created from the source plane emission cube described in Sect. 3.3.3. The first panel shows the full moment-0 map with contours shown at −3, −2, 3, 4, 5, 6, 7, 8, 9, 10σ levels. The middle panel shows the moment-0 map masked to show only values above 4σ levels where the contours are shown at 5, 6, 7, 8, 9, 10σ levels. The right panel shows the moment-1 map masked to show only values above 4σ levels. The intensity values are in arbitrary units for both the unmasked and masked moment-0 maps as output from PYAUTOLENS. The approximate beam, assuming a static magnification factor across the image, is shown in the bottom-left of each image. A clear velocity gradient is seen in the moment-1 emission map.