Latest Gamma ray Stories

2009-07-28 15:01:15

NASA's Fermi Gamma-ray Space Telescope is making some exciting discoveries about cosmic rays and the Large Area Telescope aboard Fermi is the tool in this investigation. Scientists in the Naval Research Laboratory's (NRL's) Space Science Division were instrumental in the design and development of the Large Area Telescope (LAT).Cosmic rays are electrons, positrons, and atomic nuclei that move at nearly the speed of light. Astronomers believe that the high-energy cosmic rays originate from...

2009-07-23 09:33:53

A team of researchers working with data from ESA's Integral gamma-ray observatory has disproved theories that some form of dark matter explains mysterious radiation in the Milky Way. That this radiation exists has been known since the 1970s, and several theories have been proposed to explain it. Integral's unprecedented spectral and spatial resolution showed that it strongly peaks towards the center of the Galaxy, with an asymmetry along the Galactic disc. Several researchers have...

2009-07-14 15:45:00

Back in June 1991, just before the launch of NASA's Compton Gamma-Ray Observatory, astronomers knew of gamma rays from exactly one galaxy beyond our own. To their surprise and delight, the satellite captured similar emissions from dozens of other galaxies. Now its successor, the Fermi Gamma-ray Space Telescope, is filling in the picture with new finds of its own."Compton showed us that two classes of active galaxies emitted gamma rays -- blazars and radio galaxies," said Luigi Foschini at...

2009-07-09 06:20:00

A team of astrophysicists has solved a mystery that led some scientists to speculate that the distribution of certain gamma rays in our Milky Way galaxy was evidence of a form of undetectable "dark matter" believed to make up much of the mass of the universe. In two separate scientific papers, the most recent of which appears in the July 10 issue of the journal Physical Review Letters, the astrophysicists show that this distribution of gamma rays can be explained by the way "antimatter...

2009-07-02 13:35:00

High-resolution radio, gamma-ray observations reveal site of relativistic particle acceleration in galaxy M 87An international collaboration of 390 scientists reports the discovery of an outburst of very-high-energy (VHE) gamma radiation from the giant radio galaxy Messier 87 (M 87), accompanied by a strong rise of the radio flux measured from the direct vicinity of its super-massive black hole.The combined results give first experimental evidence that particles are accelerated to extremely...

2009-05-04 11:05:00

Since its launch last June, NASA's Fermi Gamma-ray Space Telescope has discovered a new class of pulsars, probed gamma-ray bursts and watched flaring jets in galaxies billions of light-years away. Today at the American Physical Society meeting in Denver, Colo., Fermi scientists revealed new details about high-energy particles implicated in a nearby cosmic mystery. "Fermi's Large Area Telescope is a state-of-the-art gamma-ray detector, but it's also a terrific tool for investigating the...

2009-04-28 18:40:00

SAN DIEGO, April 28 /PRNewswire/ -- Today, InteliBiz announced the completion and delivery of computer software that converts data from gamma ray detectors into visual spectrums useful for identifying and measuring radioactive substances. The process is based on Gamma Spectroscopy, "Which is not a new technology," said Bill Edmett, CEO of InteliBiz, "but this software is an economical approach, which provides a relatively quick and inexpensive means of reporting on the presence of...

2009-04-24 13:35:00

The largest-ever gamma-ray telescope is set to collect its "first light" at an opening ceremony on Saturday. Located on the island of Palma, the Major Atmospheric Gamma-ray Imaging Cerenkov Magic II will replace its predecessor, the Magic telescope. When it was built, the first Magic telescope was the largest gamma-ray telescope in the world, until 2003, when the four-telescope High-energy Stereoscopic System (Hess) was unveiled. Now, Magic's successor will reclaim the title once more, but...

2008-11-19 13:45:00

An international team of researchers has discovered a puzzling surplus of high-energy electrons bombarding Earth from space. The source of these cosmic rays is unknown, but it must be close to the solar system and it could be made of dark matter. Their results are being reported in the Nov. 20th issue of the journal Nature. "This is a big discovery," says co-author John Wefel of Louisiana State University. "It's the first time we've seen a discrete source of accelerated cosmic rays standing...

2008-11-02 10:10:00

Thanks to ESA and UK technology transfer support, a British company has developed a device based on the gamma-ray detection equipment used in ESA's Integral astronomy satellite to detect and identify the radioactive material mixed with conventional explosives in "Ëœdirty bombs'. ESA has supported the development of technology for gamma-ray astronomy for more than 40 years. Integral, ESA's International Gamma-Ray Astrophysics Laboratory launched in 2002, is now detecting some of the...

Latest Gamma ray Reference Libraries

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...

2004-10-19 04:45:41

Hypernova -- A hypernova is a theoretical type of supernova produced when exceptionally large stars collapse at the end of their lifespan. In a hypernova, the core of the star collapses directly into a black hole and two extremely energetic jets of plasma are emitted from its rotational poles at nearly light speed. These jets emit intense gamma rays, and are a candidate explanation for gamma ray bursts. Theorists have come up with several plausible explanations for hypernovae. It may...

2004-10-19 04:45:41

Electromagnetic Spectrum -- The electromagnetic spectrum describes the various types of electromagnetic radiation based on their wavelengths. Radio, representing wavelengths from a few feet to well over a mile, is at one end of the spectrum. Gamma ray radiation is at the other end: the wavelength of the harder types is so short, in the subatomic range, that we do not have instruments capable of directly measuring it. While the above classification scheme is generally accurate, in...

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Word of the Day
  • A spider.
  • Figuratively, a peevish, testy, ill-natured person.
'Attercop' comes from the Old English 'atorcoppe,' where 'atter' means 'poison, venom' and‎ 'cop' means 'spider.' 'Coppa' is a derivative of 'cop,' top, summit, round head, or 'copp,' cup, vessel, which refers to 'the supposed venomous properties of spiders,' says the OED. 'Copp' is still found in the word 'cobweb.'