“This gamma-ray burst was extremely bright. We expect to see one like this only every 10,000 years or so.”
“During a GRB, we see the death of a massive star, approximately 30 times more massive than the Sun, and the formation of a black hole,” said Peter Veres, an assistant professor at the university, in an“The black hole launches a very fast jet close to the speed of light, and the jet will produce a gamma-ray burst. At later times, GRBs are visible at other wavelengths as well, from radio, or optical through very high-energy gamma-rays, which is called the afterglow of the GRB.
The crystals within the detector light up whenever gamma rays interact with them. The more energy in the burst, the more light is generated. The GBM can determine the direction of the bursts by seeing which crystals light up. The Fermi telescope has detected over 3,500 GRBs, with 221009A being by far the brightest.
“This gamma-ray burst was extremely bright. We expect to see one like this only every 10,000 years or so,” noted Veres. “We routinely detect GRBs at a rate of about five per week and keep an eye out if any of the GRBs are special in some way. This one was so bright, the instrument couldn't keep up with a large number of incoming photons,” added Veres.
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