Meet the BOAT, the brightest gamma-ray burst of all time
Gamma-ray bursts are energetic explosions that go off when a massive star dies and leaves behind a black hole or neutron star (SN: 11/20/19; SN: 8/2/21). The collapse sets off jets of gamma rays zipping away from the poles of the former star. If those jets happen to be pointed right at Earth, astronomers can see them as a gamma-ray burst.
https://www.sciencenews.org/article/boat-brightest-gamma-ray-burst-supernovaNASA Missions Detect Record-Breaking Burst
Download Options This sequence constructed from Fermi Large Area Telescope data reveals the sky in gamma rays centered on the location of GRB 221009A. Each frame shows gamma rays with energies greater than 100 million electron volts (MeV), where brighter colors indicate a stronger gamma-ray signal. In total, they represent more than 10 hours of observations.
https://svs.gsfc.nasa.gov/14227GRB 221009A also known as Swift J1913.1+1946 was an unusually bright and long-lasting gamma-ray burst (GRB) detected by the Neil Gehrels Swift Observatory on October 9, 2022. The gamma-ray burst lasted for more than ten hours since detection.
https://en.wikipedia.org/wiki/GRB_221009A