TeV γ-ray excess map (1.5° × 1.5°) of the HESS J1731−347 region smoothed with a Gaussian width σ = 0.04°. The average HESS PSF for the dataset is shown in the inset. The regions used for the spectral analysis of HESS J1731−347 and HESS J1729−345 are respectively represented by the large and small dashed circles. The position of the central compact object detected in X-rays is shown with a white cross. The linear scale is in units of excess counts per smoothing Gaussian width. The transition between blue and red in the color scale is at the level of 4σ.