HC₃N ν₇-line integrated intensity maps for different velocity ranges (indicated at the bottom of each panel). Row 1 shows the transition J=12_-1–11_-1 with E_up = 354.2 K. The interval between contours is 0.4 K km s^-1 and the lowest contour is 0.7 K km s^-1. Row 2 shows the transition J = 25_-1–24_-1 with E_up = 462.3 K. The interval of contours is 1.5 K km s^-1 and the lowest contour is 2 K km s^-1. The white plus indicates the position of the hot core and the black cross the position of the compact ridge. The beam size is also shown with a blue circle. The velocity ranges 14−18 and 18−22 km s^-1 show the integrated intensity contaminated by CH₂CHCN since there is an overlap of this species with the line of HC₃N ν₇J = 25_-1–24_-1.