Integrated intensity (zeroth moment) maps of the OCS and H₂CO emission observed towards VLA 2a, VLA1a and VLA1b (white crosses). In the H₂CO plot, the contours show the 10, 20, 30, and 40σ contours of the 48 GHz continuum emission, while in the OCS plot, they show the 3 and 6σ contours of the O¹³CS emission. The solid grey line shows the position angle of the outflow as outlined in Fig. 2, and the dashed white line shows the direction of the velocity gradients indicated here.