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The Gamma Ray Burst Monitor of the Fermi Gamma Ray Space Telescope detected a powerful gamma-ray flash on July 2, 2025.
Using new data from NASA's Fermi Gamma-ray Space Telescope, Professor Tomonori Totani at the University of Tokyo identified gamma rays extending in a halo-like structure from the center of the Milky Way.
The measured gamma-ray energy reached 20 gigaelectronvolts.
Detecting similar gamma-ray energy from other regions with high dark matter concentrations is crucial for verification.
Researchers Merce Guerrero, Anna Campoy-Ordaz, Robertus Potting, and Markus Gaug analyzed gamma ray bursts from far-off sources.
V4641 Sgr exhibited gamma ray energies up to 0.8 PeV, indicating its role as another PeV particle accelerator, with parent particles exceeding 10 PeV.
LHAASO's hybrid detector system enables detection of cosmic ray sources via ultra-high-energy gamma rays and provides detailed particle measurements around the solar system.
LHAASO observed ultra-high-energy gamma rays from five micro-quasars: SS 433, V4641 Sgr, GRS 1915+105, MAXI J1820+070, and Cygnus X-1.
Gamma-ray emissions from blazars are detected by ground-based telescopes.
The lower-energy gamma rays generated from electron-positron pairs have not been captured by gamma-ray space telescopes, such as the Fermi satellite.
The Cherenkov Telescope Array Observatory (CTAO) is expected to provide higher-resolution data to test theories regarding the origin of GeV gamma rays.
The jets from blazars produce intense gamma-ray emissions extending up to several teraelectronvolts (TeV).
The research demonstrated that dark matter could account for the Galactic Center Excess detected by NASA's Fermi Gamma-ray Space Telescope.
The Cherenkov Telescope Array may help determine if the gamma-ray excess originates from dark matter interactions or other processes.
Upcoming observatories like the Cherenkov Telescope Array are designed to probe higher-energy gamma rays.
The Cherenkov Telescope Array is a new gamma ray telescope being constructed to gather high-energy signals.
Old neutron stars that spin quickly, known as millisecond pulsars, could also explain the gamma ray observations.
The researchers transferred the samples to a gamma radiation chamber at Penn State's Radiation Science and Engineering Center, cooled to minus 60 degrees Fahrenheit.
Spent nuclear fuel emits faint UV (Cerenkov) light when gamma rays from fuel assemblies interact with electrons in the cooling pond water.
The Swift spacecraft was launched by NASA in 2004 to explore the universe's most powerful explosions known as gamma-ray bursts.