Gamma-ray bursts are thought to be highly focused explosions, with most of the explosion energy collimated into a narrow jet. [ 94 ] [ 95 ] The jets of gamma-ray bursts are ultrarelativistic , and are the most relativistic jets in the universe.

2023年11月16日 · A powerful blast of gamma-rays that may have been the most powerful cosmic explosion since the Big Bang caused significant disturbance around Earth when it struck our planet, new research finds.

2024年4月12日 · In October 2022, an international team of researchers, including Northwestern University astrophysicists, observed the brightest gamma-ray burst (GRB) ever recorded, GRB 221009A.. Now, a Northwestern-led team has confirmed that the phenomenon responsible for the historic burst — dubbed the B.O.A.T. (“brightest of all time”) — is the collapse and subsequent explosion of a massive star.

2023年3月28日 · Cambridge, MA – On October 9, 2022, an intense pulse of gamma-ray radiation swept through our solar system, overwhelming gamma-ray detectors on numerous orbiting satellites, and sending astronomers on a chase to study the event using the most powerful telescopes in the world. The new source, dubbed GRB 221009A for its discovery date, turned out to be the brightest gamma-ray burst (GRB) ever ...

GRB 221009A was an extraordinarily bright and very energetic gamma-ray burst (GRB) jointly discovered by the Neil Gehrels Swift Observatory and the Fermi Gamma-ray Space Telescope on October 9, 2022. The gamma-ray burst was ten minutes long, [1] but was detectable for more than ten hours following initial detection. [2] [3] Despite being around 2.4 billion light-years away, it was powerful ...

2023年11月21日 · Shorter bursts also produce fewer gamma rays overall, which lead researchers to hypothesize that the two classes originated from different progenitor systems. Astronomers now associate short bursts with the collision of either two neutron stars or a neutron star and a black hole, resulting in a black hole and a short-lived explosion.

2023年3月28日 · Radiation from the explosion — a gamma-ray burst (GRB) known as GRB 221009A — swept over Earth on Oct. 9, 2022. It saturated gamma-ray detectors on multiple space telescopes, ...

2023年6月8日 · The most energetic kind of explosion in the universe, a gamma-ray burst can be spotted billions of light-years away. GRB 221009A was so luminous it effectively blinded most gamma-ray instruments in space when it was detected Oct. 9, 2022. Credits: NASA’s Goddard Space Flight Center

2023年3月28日 · X-rays from the blast have illuminated 20 dust clouds in our galaxy, allowing their distances and dust properties to be determined more accurately than ever before. But a mystery remains. The debris from the exploded star that produced the gamma-ray burst appears to have disappeared without trace.

2023年6月8日 · Observations by NASA’s NuSTAR X-ray telescope give astronomers new clues about the brightest and most energetic gamma-ray burst ever detected. ... The most energetic kind of explosion in the universe, a gamma-ray burst can be spotted billions of light-years away. GRB 221009A was so luminous it effectively blinded most gamma-ray instruments in ...