Velocity dispersion (top row) and mean velocity (bottom row) measurements in 32 Voronoi bins. The first column shows the measurement for each case, and the second column shows the measurement uncertainties. The bin containing the satellite galaxy (i.e., bin 32) is outlined in white. The bins closer to the center have smaller uncertainties, thanks to less contamination from the quasar and its host galaxy. The systemic velocity of 213 km s⁻¹ was subtracted from the mean velocity map. The mean velocity map indicates that the lens galaxy is a slow rotator, with small mean velocities (≲50 km s⁻¹) and a lack of a bipolar velocity profile.