A portion of a map of CO integrated intensity from − 180 to − 90 km s^-1 of the edge of the CMZ from Fukui et al. (2006), and reprinted with permission from AAAS, based on the NANTEN CO(1−0) map which has a beam size ~3′. The region mapped with HIFI is outlined by the yellow box and the positions of the [C ii] and [N ii] observations with GREAT are indicated by crosses. The approximate CO edge of the CMZ and a portion of Loop 1 are indicated, as is the location of Sgr E.