Galactic-longitude vs. Galactic-latitude distribution of the GALCEN sample superimposed on the interstellar extinction map of Gonzalez et al. (2012). The circles denote radii of 50 pc, 100 pc, and 150 pc assuming a distance to the GC of 8.2 kpc. Open circles denote M giant stars, the filled triangle is the supergiant VR 5-7, filled circles are AGB stars (see Table 1), and asterisks are supergiant candidates (see Table 2). The gray contours show the surface brightness map of the best fit model of the nuclear bulge component by Launhardt et al. (2002).