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Fig. 2

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Channel maps of the (CH3)2CO 177,11 − 166,10 EE line (Eup/k = 110.7 K) at 223 775.3 MHz for a synthesized beam of . Contours run from 40 mJy beam-1 (2σ) to 320 mJy beam-1 in steps of 20 mJy beam-1, and the dashed contours represent –20 mJy beam-1. The bottom-right panel shows the integrated intensity (from 5 to 11 km s-1) in contours running from 20% to 95% in steps of 15% of the peak intensity (151.3 mJy beam-1 km s-1). The black square marks the center of explosion according to Zapata et al. (2009). The positions of source BN, HC, IRc6/7, source I, and methyl formate peaks (MF-1 and MF-3) are marked as triangles. The positions of acetone emission peaks (Ace-1 to Ace-3) are marked as stars.

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