(Top panel) Overlay of the 1.3 cm continuum emission (cyan contours) observed in A configuration on the average emission in the CH₃CN (19–18) K = 2 line (colors and red contours) at 350 GHz observed with ALMA by Sánchez-Monge et al. (2013). The cyan contours are 3, 12, 30, and 54 times 1σ, which is 0.023 mJy beam^-1. The velocity interval used to calculate the CH₃CN mean emission is 25.9–33.0 km s^-1. The red contour levels are 1, 2, 3, 5, 7, 10, and 15 times 50 mJy beam^-1. The ALMA and VLA synthesized beams are shown in the lower left and lower right corner, respectively. The numbers correspond to the centimeter continuum sources in Table 3. (Bottom panel) Same for the 7 mm continuum emission. The cyan contours are 3, 12, and 48 times 1σ, which is 0.033 mJy beam^-1.