Left: observed positions in the region containing CN 78 and 80 (circles correspond to the 230 GHz beam and colours as in Fig. 4). The image size is ~50′′× 100′′ and the yellow bar shows the east-west direction (east left). Right: at the top is the Hanning-smoothed 12CO(2–1) spectrum of the shell (position 78-Shell1) and below the on- and off-position Hanning-smoothed spectra of CN 78 and CN 80 with an off-set of 1.6 K. The signal from CN 78 (at the question mark) is blended with shell emission, while CN 80 (marked) is red-shifted relative to the shell component (long vertical line). Colours as in Fig. 4 and with 13CO(3–2) in red.
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