Overview of the brightest H₂CO and CH₃OH lines using Briggs weighting, the 336 GHz continuum, and the ¹³CO 6–5 map, with a similar beam size for comparison. Top row: zero-moment maps, middle row: continuum and first-moment maps, and bottom row: disk-integrated spectra. The micron-sized grain distribution as traced by 19 μm VISIR data (Geers et al. 2007) is indicated in the continuum image. The source velocity is indicated by a vertical dotted line. The grey shades indicate the noise levels in the spectra.