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Latest Gamma-ray astronomy Stories

artist rendering of GRB 130925A
2014-07-13 04:08:40

redOrbit Staff & Wire Reports - Your Universe Online A long-lasting gamma-ray burst that was first observed last year contained traits similar to those expected from explosions of some of the earliest stars in the universe, claims a new study appearing in The Astrophysical Journal. According to the ESA, the long-lasting blast of extremely energetic radiation was identified as GRB130925A, and thanks to both ground- and space-based equipment, astronomers were able to track its origin...

Middle Drum
2014-07-10 04:29:16

John P. Millis, Ph.D. for redOrbit.com - Your Universe Online All across the Universe high-energy charged particles – mostly protons, electrons, and hydrogen nuclei, though heavier nuclei also exist – are found racing in all directions. The source of these particles, collectively called cosmic rays, is masked by the interstellar magnetic field that bends their paths, making them nearly impossible to directly trace. Much progress has been made in narrowing down their origin in recent...

HESS-II telescope
2014-07-05 05:47:46

CNRS (Délégation Paris Michel-Ange) The HESS-II (High Energy Stereoscopic System) telescope in Namibia has detected gamma rays of only 30 Giga electron volts (GeV) from the Vela pulsar. This is the first pulsar to be detected by HESS and the second - after Crab in 2011 - to be spotted by ground-based gamma ray telescopes. These results have been obtained by the HESS collaboration involving the CNRS and CEA. The HESS experiment in Namibia, which was upgraded in 2012, now boasts a fifth...

Looking At Magnetic Fields Of Gamma-ray Bursts
2013-12-04 16:25:22

NASA A new study using observations from a novel instrument provides the best look to date at magnetic fields at the heart of gamma-ray bursts, the most energetic explosions in the universe. An international team of astronomers from Britain, Slovenia and Italy has glimpsed the infrastructure of a burst's high-speed jet. Gamma-ray bursts are the most luminous explosions in the cosmos. Most are thought to be triggered when the core of a massive star runs out of nuclear fuel, collapses...

Mexico Observatory To Hunt For Gamma Rays In Known Universe
2013-08-22 07:35:15

April Flowers for redOrbit.com - Your Universe Online A new observatory has begun formal operations in Mexico. The High-Altitude Water Cherenkov (HAWC) Gamma Ray Observatory is designed to study the origins of very high-energy cosmic rays and observe the most energetic objects in the known universe. The HAWC uses a unique detection technique that is different from the classical astronomical design of mirrors, lenses, and antennae, making the extraordinary observatory a significant boost...

Measuring All Light Since Big Bang May Provide Answers To Evolution Of Universe
2013-05-24 14:07:39

Lee Rannals for redOrbit.com — Your Universe Online Researchers wrote in The Astrophysical Journal that they have made the best measurement of all the light in the universe since the Big Bang yet. Measuring the number and energy of each particle of light or photon since the Big Bang could provide secrets about the nature and evolution of the Universe, such as how similar or different ancient galaxies were compared to the galaxies today. The researchers made the most accurate...

Shockingly Bright Gamma-Ray Burst Observed By Fermi, Swift
2013-05-06 04:44:26

John P. Millis, Ph.D. for redOrbit.com — Your Universe Online On Saturday, April 27, the Fermi Gamma-ray Telescope detected a sudden, powerful flux of high-energy gamma-rays, indicating a historic burst event in a distant galaxy. The instrument then notified other telescopes located in space and on the ground that a Gamma-ray Burst (GRB) had been detected. Fermi´s main instrument the Large Area Telescope (LAT) detected gamma-rays as high as 94 giga-electron volts (GeV),...

Blowing Bubbles: The Hunt For Dark Matter Is On At SNOLAB
2013-05-03 05:07:09

John P. Millis, Ph.D. for redOrbit.com — Your Universe Online The search for dark matter has been heating up over the last year or so. First, researchers using the Fermi Gamma-ray Telescope announced that a preliminary analysis of the soft gamma-ray data suggested evidence of dark matter annihilations coming from the galactic center. Then, early results from the Alpha Magnetic Spectrometer found an excess of positrons in their data, an expected signature of dark matter...


Latest Gamma-ray astronomy Reference Libraries

7_7ab115b117284658644e345b89f5ba712
2004-10-19 04:45:43

Gamma-Ray Astronomy -- Gamma-ray astronomy is the astronomical study of gamma rays. Long before experiments could detect gamma rays emitted by cosmic sources, scientists had known that the universe should be producing these photons. Work by Feenberg and Primakoff in 1948, Hayakawa and Hutchinson in 1952, and, especially, Morrison in 1958 had led scientists to believe that a number of different processes which were occurring in the universe would result in gamma-ray emission. These...

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