Line-emission maps for [O iii] λ5007 (top) and Heiiλ4686 (bottom) showing the position of the long-slit observations used for the flux calibration of the data (red dotted lines). The orientation in the sky as well as the plate scale is also indicated in the top map. The contours overlaid in both figures are of the [N ii]6584 line-emission map. In the maps above the intensity scale is normalised to the maximum value for each emission line.