An Ultrahigh-energy γ-ray Bubble Powered by a Super PeVatron

We report the detection of a \gamma-ray bubble spanning at least 100\rm deg^2 in ultra high energy (UHE) up to a few PeV in the direction of the star-forming region Cygnus X, implying the presence Super PeVatron(s) accelerating protons to at least 10 PeV. A log-parabola form with the photon... Show more