Fig. A.1
Right: spectrum of G345 NW spur showing a C2H5OH transition (53,3–42,2) at 217 803 MHz with the same Eup and nearly equal Aij as the C2H5OH transition (53,2–42,3) that is blended with the NH2CHO (1) transition (at 218 461 MHz). Left: contours of the integrated intensity map of this C2 H5OH line is overlaid on the map of the NH2CHO (1) transition to show that the strength and spatial extent is different.
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