[OIII] spectrum centered in three different positions along a 240 pc-wide slit (PA 160°). From left to right: −220 pc, −30 pc, and 160 pc from the nucleus. For every position the signal (blue) is averaged out over four pixels, corresponding to a physical width of 142 pc along the slit. In each spectrum, we have fitted one narrow and one broad component. At the −30 pc and 160 pc positions, an additional blueshifted (≈ 600 km s⁻¹) component was required to obtain a good fit.