Discovery of a new γ-ray source LHAASO J0341+5258 with emission up to 200TeV

We report the discovery of a new unidentified extended \gamma-ray source in the Galactic plane named LHAASO J0341+5258 with a pre-trial significance of 8.2 standard deviations above 25 TeV. The best fit position is R.A.=55.34^{\circ}\pm0.11^{\circ} and Dec=52.97^{\circ}\pm0.07^{\circ}. The angular size of LHAASO J0341+5258 is 0.29^\circ \pm 0.06^\circ_{stat} \pm0.02^\circ_{sys}. The flux... Show more