Soft X-ray prompt emission from the high-redshift gamma-ray burst EP240315a Article 23 January 2025 Gamma-ray bursts (GRBs) are the most energetic of known astrophysical events. Discovered in 19671 by the Vela Satellite Network, the physics of GRBs remains mostly unsolved. The GRB 221009A...
Gamma-ray burst GRB221009A was of unprecedented brightness in the γ -rays and X-rays through to the far ultraviolet, allowing for identification within a host galaxy at redshift z = 0.151 by multiple space and ground-based optical/near-infrared telescopes and enabling a first association—via...