Line-of-sight velocity distributions of the probable members. Left panel: along the optical major axis, with the systemic velocity (solid line) and the rotational component (dotted line) resulting from MultiNest run using the linear rotation model overplotted; right panel: along the minor axis, with the systemic velocity (solid line) and the rotational component (dotted line) resulting from MultiNest run using the flat rotation model overplotted. As can be seen from both panels the rotational component is negligible.