Fig. A.1
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Sample of all observations (from top: MAP1, 2, 3, 4, and Z). When more than one position were observed, the average throughout the map is shown. H2CO is seen in absorption, so we inverted the lines (TA → −TA). Using the ARO telescope, we made also a deep integration in the central point of MAP2 in C3H2 (21,2 − l0,1 85.339 GHz), without any detections.
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