Panel a) logarithmically scaled 24.5 μm image of the standard W33A model. Panel b) the same image as panel a) but convolved with the COMICS instrumental PSF. Panel c) the COMICS image of W33A. Panel d) the azimuthally averaged radial intensity profile at 24.5 μm of W33A (points with error bars) alongside the model radial profile and that of a PSF standard (the lower line). The outflow axis of the model is aligned with the SE/NW orientation of W33A’s outflow.