Top: input peak-normalized dispersed image data (gray) and model with kinematics (contours) adjusted on the fit region (rectangle). Bottom left: residual map for the model without kinematics, with a quadrupolar structure visible at Hα line location. Bottom right: residual map for model including kinematics. The cross represents the position and relative PA of the galaxy at Hα wavelength. The decrease in the χ² with two additional kinematic parameters corresponds to a 10.0σ detection.