Overlay of the emission averaged in the velocity interval [105, 115] km s^-1 of the CH₃CN (12–11) K = 2, CH₃CN (12–11) K = 6, CHCN (12–11) K = 2, and ¹³CH₃CN (12–11) K = 2 transitions on the maps of continuum obtained with the SMA and PdBI (bottom panel) towards G24. Contour levels are 3, 6, 9, 12, 15, 20, 30, and 40 times σ, where 1σ is 15 mJy beam^-1 for all species except for ¹³CH₃CN (12–11) for which 1σ is 8 mJy beam^-1. The grayscale levels are the same as in Fig. 1. The crosses mark the positions of the sources identified by Furuya et al. (2002) and Beltrán et al. (2004). The synthesized beam is shown in the lower left corner.