¹²CO J = 2−1 intensity map (black contours) integrated from 18 to 35 km s^-1, overlayed on the mid-infrared 8.28-μm MSX emission map (color scale). The contour levels are 30, 40, ..., 90% of the peak value (83.9 K km s^-1). The red star represents the center of SNR G59.5+0.1 and its extent is outlined by a red dashed circle. The radius of SNR G59.5+0.1 is 15′ (Taylor et al. 1992; Billot et al. 2010). The white box outlines the field seen in Fig. 2.