Co-added direct images in [O III] (top panel) and H α (bottom panel). The slit positions of the spectroscopy are indicated in the top panel. While in the inner part, a linear intensity scale covering the whole range from zero to peak flux of the nebula was used, for regions with flux below 5% a steep asinh between 0.01 and 1% of the peak of the linear part was used to enhance the by orders of magnitude fainter structures.