Multi-pointing grids overlaid with the SCUBA-2850 µm map. The black dots in a (∆RA, ∆Dec)=(10″, 10″)-spacing 45º-cut show the pointings of IRAM 30-m and GBT observations. The red dotted grid shows the pointings of JCMT observations. The circles at the top and bottom indicate the beam sizes (θ_MB) of each spectral observation with the same color as the pointing grid except that GBT beam sizes are shown in blue. The 850 µm map is shown in grayscale with a beam size of 14″ and overlaid with its contours at 0%, 20%, 40%, 60%, and 80% of its peak intensity at 78 mJy beam⁻¹.