GRB 180720B: A Glitching Giant

GRB 180720B, observed by Fermi-GBM on 20 July 2018 at 14:21:39.65 UT with an isotropic energy of E_iso = 5:92x10⁵³ erg, is classified as a Binary-driven Hypernova of type I (BdHN I). The gravitational collapse of the CO_core leads to a supernova (SN) explosion and to a collapsing iron core producing a new NS (νNS). The hypercritical accretion of the SN ejecta onto the νNS leads to a long-lasting X-ray afterglow with a luminosity L_X / t^-1.48±0.32. We propose that this short-term radiation with energy of ΔE_g,rad = 3x10⁵⁰ erg, occurring during the characteristic time of Δt_rec~ 10³ s is due to the glitch events caused by the energy of the injected relativistic electrons occurring in the magnetosphere of the νNS during its slowing down.