7 × 7 pixel fully sampled maps are extracted toward the central positions of the sources in ¹³CO 6−5 (left) and in ¹²CO 6−5 (middle) transitions. The axes represent the equatorial offsets (Δα, Δδ) in arcsec. The main beam temperature intensity scale of each box are shown in the y-axes of the bottom-left box in Kelvins. The velocity range in each box is ±8 km s^-1 for the ¹³CO spectra, and ±25 km s^-1 for the ¹²CO spectra. The red lines in the left-hand panels are the ¹³CO 6−5 model line intensities for the passively heated envelope. The excess emission in the observations compared with these model profiles corresponds to the UV-heated gas and is shown as an image in the right panel with the intensity scale in K km s^-1. The middle and right panels contain the red and blue outflow lobes with the contour levels given in Table A.1. The blue and red arrows in the right-hand panels show the direction of the outflow lobes.