Two-dimensional Gaussian function with a total integration of one and a FWHM of 0.5″ (color scale). This was assumed as a typical emission distribution for COMs based on the results of PILS (e.g., Jørgensen et al. 2016). Two circular regions with radii of 0.25″ and 0.5″ are overplotted, representing beams of PILS (white) and Band 3 (black), respectively. The crosses show the peak position, 0.25″, and 0.5″ offset positions.