H₂CO (4_1,4−3_1,3) integrated intensity (moment 0) maps. The integrated velocity ranges are given in the lower right corner of the figures and correspond to the line core (top) and the blue (middle) and redshifted (bottom) emission. The map RMS (σ) are 0.64 K km s⁻¹ (top), 0.49 K km s⁻¹ (middle) and 0.61 K km s⁻¹ (bottom). Contours are drawn at 3σ, in steps of 2σ between 4σ and 10σ and in steps of 10σ afterwards. The right sided color bar indicates the intensity of the emission in units of K km s⁻¹. The black circles mark the positions of IRAS 16293 A/B and E, while the black squares mark positions according to Table B.1. The beam size is included in the lower left corners.