Source plane intensity (left panels), error map (middle panels), and S/N map (right panels) for the continuum (top), CO(6−5) (second row), CO(6−5) source plane emission cube (third row), H₂O (fourth row), and H₂O⁺ (bottom row) emission. The grey grid shows the Voronoi pixels prior to interpolation to the square pixel grid, as described in Sect. 3.3.3. The black line shows the caustic line. Note: the error maps have been normalized by the maximum value in the respective intensity map and, therefore, the error maps can be seen as a percentage error for each pixel. For the CO(6−5) source plane cube the intensity map is the source plane moment-0 map and the intensity map is a moment-0 map of the error cube as described in Sect. 3.3.3. Note: the S/N map is zoomed-in compared to the other two panels.