Up until now, it was thought all gamma-ray
bursts were followed by a radio afterglow - a premise that a team of Australian astronomers of the Centre for All-sky Astrophysics (CSTRO) at Curtin University and the University of Sydney originally set out to prove correct.
A trio of NASA satellites, working in concert with ground-based robotic telescopes, captured never-before-seen details that challenge current theoretical understandings of how gamma-ray
NASA's Fermi Gamma-ray
Space Telescope is an international and multi-agency astrophysics and particle physics partnership managed by NASA's Goddard Space Flight Center in Greenbelt, Md.
Even though copious gamma-rays
are emitted by this process, very little visible light is produced, creating a kind of electrical breakdown within the storms called "dark lightning.
GLAST's goal is reveal the origins of the mysterious and sporadic cosmic flashes known as gamma-ray
After analyzing four years of data, Fermi scientists see a distinguishable feature in the gamma-ray
emission of both remnants.
23 circular of the Gamma-Ray
Burst Coordinates Network.
Theorists expect gamma-ray
outbursts occur only in close proximity to a galaxy's central black hole, the powerhouse ultimately responsible for the activity.
The scientists calculated that gamma-ray
radiation from a relatively nearby star explosion, hitting the Earth for only ten seconds, could deplete up to half of the atmosphere's protective ozone layer.
Washington, August 14 ( ANI ): Gamma-ray
photons seen emanating from the center of the Milky Way galaxy could support the theory that dark matter exists at the center of galaxies, according to UC Irvine astrophysicists.
For a fleeting moment, gamma-ray
bursts radiate more energy than any quasar, then they vanish without a trace.
With its 28-meter-sized mirror, the telescope is dedicated to observing the most violent and extreme phenomena of the universe in very high energy gamma-rays
The center of the Milky Way galaxy, 25,000 light-years from Earth, is again producing large quantities of radiation in the form of gamma-rays
of a specific energy, 511 kilo-electron volts.
Fermi's Large Area Telescope (LAT) mapped billion-electron-volt (GeV) gamma-rays
from three middle-aged supernova remnants - known as W51C, W44 and IC 443 - that were never before resolved at these energies.
Barthelmy and his collaborators measured the gamma-rays
given off by the radioactive decay of cobalt-56, which was synthesized in the supernova explosion.