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Gamma-Ray Bursts (GRBs):The Long and Short of It
Long gamma-ray burst
(>2 seconds'duration)
A red-giant y star collapses _v a ^_onto its core..
Short gamma-ray burst
(<2 seconds'duration)
Stars*in a compact binary system begin to spiral inward....
...eventually
colliding.
...becoming so densethat it expels its outer Jóyers in a supernova ćxplosion.
Torus
The resulting torus has at its center a powerful black hole.
Gamma rays
Possibly neutron stars
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