Left panel: Herschel 70 μm contours overlaid on an Hα image of the HST (Wilson et al. 2000). The contour levels are 500, 1000, 2000, 3000, and 4000 MJy/sr. The concentric circles show the beam sizes of ¹²COJ = 3 → 2 for APEX (18′′, white thick line) and ¹²COJ = 1 → 0 for SEST (45′′, red dashed line). Right panel: CO spectra observed in the central position. ¹²COJ = 6 → 5, 7 → 6, and Ci are multiplied by a factor of 2, and ¹³COJ = 3 → 2 is multiplied by a factor of 5. The (shaded) line emission ranges from ~200 to ~700kms^-1.