NASA's Fermi, Swift Detect GRB 221009A, 70 Times Brighter Than Any Previous Burst
Updated
Updated · spacedaily.com · May 24
NASA's Fermi, Swift Detect GRB 221009A, 70 Times Brighter Than Any Previous Burst
2 articles · Updated · spacedaily.com · May 24
GRB 221009A, detected on Oct. 9, 2022 by NASA’s Fermi and Swift, was so intense it saturated most space-based gamma-ray instruments, forcing scientists to reconstruct its true power from Fermi and other data.
NASA said the long gamma-ray burst came from about 1.9 billion light-years away yet still outshone every prior event, earning the nickname BOAT—Brightest Of All Time.
Eric Burns and colleagues, analyzing about 7,000 gamma-ray bursts, estimated an event this bright occurs roughly once every 10,000 years.
The finding sits in a field born by accident: Vela satellites built in the 1960s to detect clandestine nuclear tests recorded the first gamma-ray burst in 1967, with cosmic origin confirmed in a 1973 paper.
Later work—especially BeppoSAX afterglow detections in 1997—showed gamma-ray bursts come from distant galaxies, typically from collapsing massive stars or compact-object mergers that launch narrow jets toward Earth.
How did a Cold War nuclear watch program accidentally unveil the universe's most powerful explosions?
With new AI and satellites, what cosmic secrets are hiding in plain sight within our data?
Are cosmic explosions now being used to test if the speed of light is truly constant?
GRB 221009A: The Brightest Gamma-Ray Burst Ever Recorded and Its Impact on Astrophysics and Earth
Overview
On October 9, 2022, astronomers witnessed an extraordinary cosmic event when GRB 221009A, the brightest gamma-ray burst ever recorded, was detected. NASA's Fermi Large Area Telescope observed the burst for over 10 hours, while Swift’s X-Ray Telescope captured its powerful afterglow. The coordinated efforts of these advanced instruments confirmed the event’s unparalleled intensity, earning it the nickname 'Brightest Of All Time' (BOAT). This rare detection provided scientists with a unique opportunity to study the mechanics of such powerful cosmic explosions, offering new insights into the universe’s most energetic phenomena.