SiS v = 2J = 36–35 channel map, averaged over three channels with a natural weighting and for a circular beam of 0.4′′. North is up, east is left; the black cross indicates the centre of the continuum map. The flux density units are Jy/beam. The contours are at (−1, 1, 2, 4, 8...) × 0.5 Jy/beam (~3σ_rms). This high-excitation line has a width of ~9 km s^-1, and the line formation region is unresolved with the current ALMA beam. The contrast in the figure is best visible on screen.