Discovery of GeV Gamma-ray Emission from the Galactic Supernova Remnant Kes 41

Abstract

We present the discovery of gamma-ray emission of the mixed-morphology supernova remnant (SNR) G337.8$-$0.1 (Kes 41) in the energy range of 0.2 $-$ 300 GeV using the data from Large Area Telescope on board of Fermi Gamma-ray Space Telescope ({\it Fermi}-LAT). SNR shocks interacting with molecular clouds are the best sites to search for the 'hadronic' origin of the gamma-ray emission and the acceleration processes of high-energy particles. There is multi-wavelength evidence for interactions of Kes 41 with a nearby molecular cloud suggesting that it may be a site for cosmic-ray acceleration. In this paper, we present the gamma-ray analysis using the {\it Fermi}-LAT data of $\sim$6 years, where we try to disentangle the complex morphology of the neighborhood of Kes 41. We report the detection of Kes 41 at a significance of $\sim$21$\sigma$ and a new closeby source ($\sim$31$\sigma$), as well as give preliminary results of the extension measurements.

Keywords

• supernova remnants
• compact objects
• galaxies: general

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