Gamma-ray bursts (GRBs)
Context
- Researchers derived the spectrum of the very-high-energy gamma-ray afterglow emission of a relatively nearby gamma-ray burst.
About
- Gamma-ray bursts (GRBs) are immensely energetic explosions that have been observed in distant galaxies.
- They are the brightest and most energetic electromagnetic events known to occur in the universe.
- Bursts can last from ten milliseconds to several hours.
- After an initial flash of gamma rays, a longer-lived "afterglow" is usually emitted at longer wavelengths (X-ray, ultraviolet, optical, infrared, microwave and radio)
- The intense radiation of most observed GRBs is released during processes like creation or merging of neutron stars or black holes.
- All observed GRBs have originated from outside the Milky Way galaxy.
- GRBs were first detected in 1967 by the Vela satellites.
1.png)
