Velocity curve of the O I 8446 Å line from X-shooter. The velocities are from the June dataset at nearly phase-on precessional phase and were cross correlated with the point at ϕ = 0.08. Superposing the γ velocity of the system (from the He II or Si II curve for example) gives a value in agreement with Fig. 14 and with the system velocity, indicating that this line does not come from the disk-wind.