Left: channel maps of the (CH₃)₂CO emission at 101.43 GHz for a synthesized beam of , where four (CH₃)₂CO lines, 9_1,8 − 8_2,7 AE/EA and 9_2,8 − 8_1,7 AE/EA (E_up/k = 26.9 K), are blended together. Contours run from 9 mJy beam^-1 (3σ) to 114 mJy beam^-1 in steps of 15 mJy beam^-1, and the dashed contours represent –3 mJy beam^-1. The bottom-right panel shows the integrated intensity (from 5 to 11 km s^-1) in contours running from 10% to 90% in steps of 10% of the peak intensity (623.1 mJy beam^-1 km s^-1), and the dashed contours represent –5 mJy beam^-1 km s^-1 (1σ). Right: channel maps of the (CH₃)₂CO emission at 101.45 GHz in a synthesized beam of , where two (CH₃)₂CO lines, 9_1,8 − 8_2,7 EE and 9_2,8 − 8_1,7 EE (E_up/k = 26.8 K), are blended together. Contours run from 24 mJy beam^-1 (8σ) to 216 mJy beam^-1 in steps of 24 mJy beam^-1, and the dashed contours represent –3 mJy beam^-1. The bottom-right panel shows the integrated intensity (from 5 to 11 km s^-1) in contours running from 10% to 90% in steps of 10% of the peak intensity (1.1 Jy beam^-1 km s^-1), and the dashed contours represent –0.005 mJy beam^-1 km s^-1 (1σ). The black square marks the center of explosion according to Zapata et al. (2009). The positions of source BN, HC, infrared sources IRc6/7, source I, 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.