Line maps (selected to trace expansion motions) integrated over the velocity range indicated in each panel (which can be considered, from left to right, as the high-velocity part of the outflow, low-velocity part, systemic velocity, and low-velocity part of the outflow at the far side). The first velocity range of HC₃N is blended by other lines. In the second velocity range of CO the emission is extended this much to cause imaging artifacts. The map size is 5′′ (tick spaces are 1′′, centered on RA 18:08:38.236, Dec –19:51:50.25). Beams are shown in the lower left, and the number in the lower right of each panel is the maximum flux in K km s^-1 (contours are  ± 20 and 50% of that value). The color scale is from –1000 to 1000 K km s^-1. The energy of the lower level is given in the upper left.