Integrated intensity of ¹³CO 6–5 (contours) overplotted on the integrated intensity of [CI] (colorscale). Both distributions are normalized to the peak integrated intensity of that particular line. For ¹³CO the contours are in levels of 10%, 20%, ..., 80%, 90% w.r.t. to this peak intensity, with the lowest contour higher than 3 times the noise level in Table 2. The [CI] emission scales between 3 times the noise level and the highest intensity in the map, which can be found in Table 2. Where known, locations of (sub)millimeter interferometry sources are shown with “×”, except for the Vela sources.