Kinematical configuration. The four black bullets correspond to the position of the four galaxies on the sky. 3D velocities, labelled V_tot and associated with each galaxy, are displayed as green arrows. Velocities in the plane of the sky, as derived from the X-ray tail, are displayed as blue arrows. The radial velocities associated with the redshift of each galaxy are displayed in orange. The filled rectangles lie in the plane of the sky as well as the MaNGA hexagonal field and are displayed in blue. (In order to give an overview of the 3D effect, we added a purple hexagon projected at the main redshift velocity.) The grey arrow (in the plane of the sky) points towards the centre of A2142.