Left panel: distribution of the measured H_α (red crosses), H_β (green squares), and stellar (blue triangles) line-of-sight velocities V_los along the major axis over the sky plane. Right panel: distribution of the measured H_α (red crosses), H_β (green squares), and stellar (blue triangles) line-of-sight velocities V_los along the minor axis over the sky plane. The measured points do not lie further than 0.32 kpc (< 1 spaxel or < 0.5 arcsec) from the axes.