x versus y color-color diagram of the 3818 globular cluster candidates selected according to their shape, color, and magnitude. The plot shows the (g′−r′)₀ as a function of (r′−i′)₀, color coded according to the g′₀ magnitude. The left and bottom panels show the (g′−r′)₀ and (r′−i′)₀ color distributions, respectively. The red stars represent compact objects identified by Mieske et al. (2007) which were recovered in our selection. The properties of these objects are summarized in Table B.1.