Color–color diagram of the 2MASS infrared sources in the vicinity of G45.47. The two solid curves represent the location of the main sequence (thin line) and the giant stars (thick line) derived from Bessell & Brett (1988). The parallel dashed lines are reddening vectors with the crosses placed at intervals corresponding to five magnitudes of visual extinction. We have assumed the interstellar reddening law of Rieke & Lebofsky (1985) (A_J/A_V = 0.282; A_H/A_V = 0.175 and A_K/A_V = 0.112). The sources reddened by circumstellar dust are indicated as red circles.