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We report the extended GeV $\gamma$-ray emission around the high Galacticlatitude supernova remnant (SNR) DA 530 with the PASS 8 data recorded by theFermi Large Area Telescope (Fermi-LAT). The $\gamma$-ray spectrum in the energyrange of 100 MeV - 1 TeV follows a power law model with an index of 2.23. Themuch more extended $\gamma$-ray emission than the radio shell of DA 530 and thespatial coincidence with the molecular cloud suggest that the $\gamma$-rayemission could be originated from the hadronic process, where the high energyprotons are accelerated in and escaped from the shock of DA 530. With asteady-state injection model of protons, the $\gamma$-ray spectrum can be wellfitted with the typical Galactic value for diffusion coefficient and the lowenergy content of the total escaped protons.

Detection of the extended $\gamma$-ray emission around supernova remnant DA 530 with Fermi-LAT