Figure 10.
γ-ray emission associated with the detected targets: total counts minus the contributions attributed by the fit to all emission components in Equation (6) but (A) the low-latitude IV Arch, (B) the lower IV Arch, (C) the IV Spur. The maps were smoothed using a 2° Gaussian kernel to suppress statistical fluctuations and enhance extended features. The overlaid contours of H i column density have levels (A) 0.6 × 1020 and 1.2 × 1020 atoms cm−2, (B) 0.8 × 1020 and 1.6 × 1020 atoms cm−2, (C) 0.9 × 1020 and 1.8 × 1020 atoms cm−2.