Position–velocity diagrams of CO(6–5) emission along parallel (top) and perpendicular (bottom) cuts shown in Fig. 6 and plotted in the same way as Figs. 7 and 8using thesame angular resolution as for [C II]. Ten linear contours from 0.8 to 68 K are shown, and the gray scale extends from 0.8 to 85 K. In the parallel cuts, red- and blueshifted emission from the VLA 1623 outflow in the SW is observed. The blueshifted outflow lobe in the SE is detected in the perpendicular cut 80′′ from S 1. This bipolar outflow is unrelated to the S 1 PDR. There is no evidence for PDR emission in the perpendicular cut 80′′ NE of S 1. The CO(6–5) emission is faint and most likely comes from the surrounding molecular cloud.