PV diagrams for the cuts with steps of 0.″15 through the NE lobe of the SO-traced outflow. The offset of the cut is indicated in the top-left corner of each panel. The red (blue) cross indicates the peak in the red (blue) part of each diagram. The vertical and horizontal lines mark, respectively, the position of the protostar and the systemic velocity, V_star, obtained from the Keplerian fit (see Table 3). The zero offset corresponds to the fitted position of the 1.3 mm continuum peak.