GeV Gamma-ray Emission Coinciding with HESS J1832-085

Recent studies (Maxted et al. 2019) of the Galactic supernova remnant (SNR) G23.11+0.18 in radio wavelengths revealed that the radio emission of the SNR was spatially coincident with a TeV gamma-ray source, HESS J1832−085. A dip in molecular gas at a velocity of ~85 km/s and molecular gas clumps at a neighbouring velocity towards HESS J1832−085 hints to the possibility of hadronic gamma-ray production mechanism in the northern parts of the SNR. We analysed 10-years of gamma-ray data taken by Fermi-LAT in the energy range of 0.2-300 GeV to look for possible spatial correlations between GeV and TeV gamma rays, as well as any overlaps between the radio and gamma-ray emissions within the close neighbourhood of G23.11+0.18. Here, we report about the detection of the excess GeV gamma-ray emission partially coinciding with both G23.11+0.18 and HESS J1832−085 in the northern region of the SNR.