CO J = 3−2 peak brightness temperature. Left: map rotated 14° counterclockwise to bring the illuminating star direction in the horizontal direction. The two crosses and the red vertical line are the same as in Fig. 2, and the angular resolution is plotted in the bottom left corner. Middle: spectrum of the CO J = 3−2 line at the PDR position. Right: profiles at the vertical position of the PDR (solid green curve) and dense core (solid blue curve), averaged over 1″ in the δy direction. The dotted green and blue lines display the ±1σ significance levels, corresponding to the standard deviation of the average in the δy direction.