Successive stages of the iterative fitting process shown here. The model count map of each individual component (correlated with the H.E.S.S. PSF) added in each step of the analysis is shown in the left-hand column (in units of counts per pixel) and the corresponding residual significance map (in units of significance level) is shown in the right-hand column, both in Galactic coordinates. From top to bottom we show background plus G0.9+0.1 plus HESS J1745−290 plus Galactic large-scale unresolved, the dense gas component (DGC), the central component (CC), the large-scale component (LSC), and the new source HESS J1746−285. The residualLi & Ma significance maps are computed using the data counts map as signal and the model map (correlated with the H.E.S.S. PSF) as background.
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