Gamma ray

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Gamma ray

A high-energy photon, emitted by radioactive substances.
References in periodicals archive ?
The Italian Space Agency's AGILE gamma-ray satellite first reported the flare, followed by Fermi.
Ferrante said as NASA points out, gamma-ray bursts are the most powerful explosions in the universe since the Big Bang.
The Gamma-ray Burst Monitor (GBM) aboard NASA's Fermi Gamma-ray Space Telescope captured the initial wave of gamma rays from GRB 130427A shortly after 3:47 a.
It lasted for more than 23 minutes-700 times longer than the typical gamma-ray burst.
Right after the gamma-ray burst was detected, dozens of scientific institutions in many parts of the world raced to look for any traces it might have left.
Measuring delays in time between these events finally produced better constraints on the exact location in the vicinity of supermassive black holes where the gamma-ray outbursts take place.
Hot matter surrounding a new black hole and internal shock waves produced by collisions within the jet are thought to emit gamma-rays with energies in the million-electron-volt (MeV) range, or roughly 500,000 times the energy of visible light.
If theorists re jigger equations describing the cosmic objects, gamma-ray bursts could still be in the lineup, scientists report in the April 19 Nature.
Gamma-ray bursts can be seen over extremely long distances-billions of light-years.
Topics of the 22 invited talks include high-energy neutrino astronomy, the origin of galactic cosmic rays, the highest-energy cosmic rays, cosmic rays and gamma radiation from clusters of galaxies, gamma-ray blazars, non-thermal x-ray emission from supernova remnants, gamma-ray line astronomy, and neutrino telescopes.
Additional contributions to the width, that are not currently accounted for, include fluctuations in the amount of energy a gamma-ray actually deposits in the detector (currently, it is assumed that each photon deposits its full energy) and background due to neutrons that are scattered off the target and subsequently capture in other surrounding materials.
Washington, April 4 ( ANI ): A new research of gamma-ray light from the center of our galaxy makes the strongest case to date that some of this emission may arise from dark matter - an unknown substance making up most of the material universe.