China's Large High Altitude Air Shower Observatory (LHAASO), a high-altitude cosmic ray observatory, has released the precise energy spectrum for the highest-energy gamma-ray radiation from the brightest ever gamma-ray burst (GRB) observed to date, which was described by scientists as a once-in-10,000-year event.

The study, conducted by the LHAASO collaboration team, was led by the Institute of High Energy Physics (IHEP) of the Chinese Academy of Sciences, and the findings were published recently in the journal Science Advances. GRBs are immensely energetic explosions that have been observed in distant galaxies. They are the most energetic and luminous electromagnetic events since the Big Bang.