"The BOAT": Brightest Of All Time 18-TeV Cosmological Monster
GRB 221009A was an unprecedented, once-in-10,000-years cosmological blast. Emitting an isotropic-equivalent energy E_iso exceeding 10^55 ergs, the burst completely saturated space-based detectors, perturbed Earth's ionosphere at 500 km altitude, and generated the highest-energy photon ever observed from a GRB: a staggering 18 TeV photon detected by LHAASO in China.