Eagle, JJEagleMARCHESI, STEFANOSTEFANOMARCHESICastro, DDCastroAjello, MMAjelloVendrasco, AAVendrasco2021-12-072021-12-0720200004-637Xhttp://hdl.handle.net/20.500.12386/31208We report on the investigation of a very high energy (VHE), Galactic γ-ray source recently discovered at >50 GeV using the Large Area Telescope (LAT) on board the Fermi Gamma-ray Space Telescope (Fermi). This object, 2FHL J1703.4-4145, displays a very hard >50 GeV spectrum with a photon index Γγ ∼ 1.2 in the 2FHL catalog and, as such, is one of the most extreme sources in the 2FHL subsample of Galactic objects. A detailed analysis of the available multiwavelength data shows that this source is located on the western edge of the supernova remnant (SNR) G344.7-0.1, along with extended TeV source, HESS J1702-420. The observations and the spectral energy distribution modeling support a scenario where this γ-ray source is the byproduct of the interaction between the SNR shock and the dense surrounding medium, with escaping cosmic rays (CRs) diffusing into the dense environment and interacting with a large local cloud, generating the observed TeV emission. If confirmed, an interaction between the SNR CRs and a nearby cloud would make 2FHL J1703.4-4145 another promising candidate for efficient particle acceleration of the 2FHL Galactic sample, following the first candidate from our previous investigation of a likely shock-cloud interaction occurring on the western edge of the Vela SNR.STAMPAenArticle10.3847/1538-4357/abbe082-s2.0-85097501122WOS:000592690200001https://iopscience.iop.org/article/10.3847/1538-4357/abbe08https://api.elsevier.com/content/abstract/scopus_id/850975011222020ApJ...904..123EFIS/05 - ASTRONOMIA E ASTROFISICA