Spitzer/IRAC 3-color image (with 8.0 μm in red, 4.5 μm in green, and 3.6 μm in blue) toward the position of a CH₃OH maser (G352.111+0.176, v_LSR   =   −54.8 km s^-1), which is marked by the white cross sign (×). Also shown on the image are: (1) the search radius (smaller circle) used to identify the peak “green” value (R_peak); (2) the search radius (larger circle) used to identify the background value (R_bg); (3) the contour that defines the candidate green source in the image; and (4) the position of the CH₃OH maser (×). Note that the cross (×) indicates only the position of the maser, and the size of the cross has no meaning.