PACS spectral maps in the H₂O 2₁₂−1₀₁ line at 179.527 μm. Wavelengths in microns are translated to the velocity scale on the X-axis using laboratory wavelengths of the species and cover the range from − 600 to 600 km s^-1. The Y-axis shows fluxes normalized to the spaxel with the brightest line on the map in a range − 0.2 to 1.2. The orange contours show continuum emission at 30%, 50%, 70%, and 90% of the peak value written in the bottom left corner of each map.