Transverse PV diagram of the H₂ emission line region extracted at a projected z of $1\stackrel{″}{.}2$ and with a pseudo slit width of $0\stackrel{″}{.}5$. The radial velocity of the molecular emission is much lower than that of the atomic emission. Two emission peaks can be seen on either side of the source position, labelled A1 and A2. The emission peak on the left side of the cavity (A1) has a slightly higher radial velocity of −33.9 km s⁻¹ than the emission peak on the right side of the cavity (A2) at −16.9 km s⁻¹. This hints at the presence of a velocity gradient transverse to the outflow direction in the cavity. Contour levels begin at 3σ of the background emission and increase by factors of 1.2.