Left: ¹³CO(J = 1 → 0) line emission (in units of K) of a single velocity channel at 55.36 km s^-1. Middle: GLIMPSE 8μm emission (in units of MJysr^-1). Right: VGPS 21 cm continuum emission (in units of K). The cyan contours indicate the MAGIC >1 TeV TS levels in steps of 1, starting at 3. The green circle-square markers indicate Hii regions in the catalog of Anderson et al. (2009), while the white circle marker indicates the Hii region HRDS G036.347+0.048 (Bania et al. 2012). The larger dashed circle marks the position of a possible cavity in the molecular gas.