Maps of representative transitions of glycolaldehyde and related species. The four panels to the left show the entire IRAS 16293−2422 system, while the four panels to the right zoom-in on IRAS 16293B (indicated as the red dashed square in the lower left panel). The mapped species are glycolaldehyde (362.406 GHz, E_up = 266 K; upper left), ethylene glycol (348.550 GHz, E_up = 329 K; upper right), acetic acid (352.872 GHz, E_up = 275 K; lower left), and methyl formate (360.467 GHz, E_up=324 K; lower right). In each map the contours represent the integrated emission over ± 0.5 km s^-1 in steps of 15 mJy km s^-1 (approximately 3σ). In each panel the plus sign marks the location of the continuum sources associated with IRAS 16293A and IRAS 16293B (labeled A and B in the lower left panel), while the crosses in the right panels represent the positions offset by half a beam and a full beam from IRAS 16293B. These are the positions used for line identification/modeling.