Part of the map of ¹³CO spectra obtained for area W8. The offsets in RA and Dec from the central position are in steps of 60″. The velocity interval, in km s⁻¹, and the antenna temperature, T_Α in Kelvin, are indicated in the upper-right panel. The component at around −18 km s⁻¹, present in most panels, is related to the foreground shell, whereas the component at around −7 km s⁻¹ has a local origin.