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We report on the investigation of a very high energy (VHE), Galacticgamma-ray source recently discovered at >50GeV using the Large Area Telescope(LAT) on board the Fermi-LAT. This object, 2FHL J0826.1-4500, displays one ofthe hardest >50GeV spectra (gamma-ray photon index ~1.6) in the 2FHL catalog,and a follow-up observation with XMM-Newton has uncovered diffuse, soft thermalemission at the position of the gamma-ray source. A detailed analysis of theavailable multi-wavelength data shows that this source is located on theWestern edge of the Vela supernova remnant (SNR): the observations and thespectral energy distribution modelling support a scenario where this gamma-raysource is the byproduct of the interaction between the SNR shock and a neutralHydrogen cloud. If confirmed, this shock-cloud interaction would make 2FHLJ0826.1-4500 a promising candidate for efficient particle acceleration.

2FHL J0826.1-4500: Discovery of a possible shock-cloud interaction on the Western edge of the Vela SNR