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Fig. 1


Gaussian kernel (σ = 0.5°) smoothed counts maps of the region of interest (ROI) in a true local projection before (left) and after subtraction of the background model (right) for the energy range 200 MeV–20 GeV and for a pixel size of 0.05° × 0.05°. Overlaid are IRIS 100 μm contours of M 31 convolved with the LAT point spread function to indicate the extent and shape of the galaxy. The boxes show the locations of the 4 point sources that have been included in the background model.

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