Multi-wavelength view of the HESS J1731−347 region. The radio and the γ-ray image show the same field of view while the X-ray image is zoomed in order to show the details of the shell structure. The significance contours at 4, 6 and 8σ obtained with an integration radius of 0.06° and the Galactic plane (white dashed line) are overlaid in the three panels. Left: ATCA radio map at 1.4 GHz from the south Galactic plane survey (SGPS) in units of Jy/beam with a beam of 100′′. The HII regions G353.42-0.37 (left) and G353.381-0.114 (right) are marked with arrows. Middle: XMM-Newton observation of a sub-region of the SNR, in the 0.5–4.5 keV energy band, using MOS instruments with units in ph/cm²/s/arcmin². The position of the source XMMU J173203.3−344518, which is likely to be the CCO of the SNR is shown by the red arrow. Right: TeV γ-ray excess map of HESS J1731−347 smoothed with a Gaussian with σ = 0.04°. The region used to derive the radio flux and the spectral parameters in X- and γ-rays for the SED is also shown.