News tagged with energy gamma rays
A new way to discover pulsars
(Phys.org) -- The Large Area Telescope (LAT), built by SLAC for the Fermi Gamma-ray Space Telescope, collects information on high-energy gamma rays from numerous sources in the sky. Among these are small, ...
May 22, 2012 |
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Astrophysicists discover new heating source in cosmological structure formation
(Phys.org) -- So far, astrophysicists thought that super-massive black holes can only influence their immediate surroundings. A collaboration of scientists at the Heidelberg Institute for Theoretical Studies ...
May 15, 2012 |
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Where do the highest-energy cosmic rays come from? Not from gamma-ray bursts, says IceCube study
The IceCube neutrino telescope encompasses a cubic kilometer of clear Antarctic ice under the South Pole, a volume seeded with an array of 5,160 sensitive digital optical modules (DOMs) that precisely track ...
Apr 18, 2012 |
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Powerhouse in the Crab Nebula
MAGIC telescopes measure the highest-energy gamma rays from a pulsar to date, calling theory into question.
Mar 29, 2012 |
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NASA small explorer mission celebrates ten years and forty thousand X-ray flares
(PhysOrg.com) -- On February 5, 2002, NASA launched what was then called the High Energy Solar Spectroscopic Imager (HESSI) into orbit. Renamed within months as the Ramaty High Energy Solar Spectroscopic Imager ...
Space & Earth / Space Exploration
Feb 09, 2012 |
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Fermi shows that Tycho's star shines in gamma rays
(PhysOrg.com) -- In early November 1572, observers on Earth witnessed the appearance of a "new star" in the constellation Cassiopeia, an event now recognized as the brightest naked-eye supernova in more than ...
Dec 13, 2011 |
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NASA's Fermi finds youngest millisecond pulsar, 100 pulsars to date
An international team of scientists using NASA's Fermi Gamma-ray Space Telescope has discovered a surprisingly powerful millisecond pulsar that challenges existing theories about how these objects form.
Nov 04, 2011 |
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The high energy crab
(PhysOrg.com) -- The Crab Nebula is the remnant of a supernova. Its precursor star exploded in 1054 AD in an event that was recorded by Chinese and (quite probably) Anasazi Indian astronomers. It is called ...
Oct 31, 2011 |
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Astrophysics and extinctions: News about planet-threatening events
Space is a violent place. If a star explodes or black holes collide anywhere in our part of the Milky Way, they'd give off colossal blasts of lethal gamma-rays, X-rays and cosmic rays and it's perfectly reasonable to expect ...
Space & Earth / Space Exploration
Oct 07, 2011 |
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Fermi's latest gamma-ray census highlights cosmic mysteries
(PhysOrg.com) -- Every three hours, NASA's Fermi Gamma-ray Space Telescope scans the entire sky and deepens its portrait of the high-energy universe. Every year, the satellite's scientists reanalyze all of ...
Sep 09, 2011 |
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UNH scientists to build device for detecting contraband radioactive material
Researchers at the University of New Hampshire's Space Science Center (SSC), in partnership with Michigan Aerospace Corporation, have been contracted by the federal Defense Threat Reduction Agency (DTRA) to build a highly ...
Chemistry / Analytical Chemistry
Sep 08, 2011 |
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Blazars
(PhysOrg.com) -- A blazar is a galaxy which, like a quasar, has an intensely bright central nucleus containing a supermassive black hole. In a blazar, however, the emitted light sometimes includes extremely ...
Sep 06, 2011 |
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Gamma-ray emission from Terzan 5
(PhysOrg.com) -- The H.E.S.S. telescope system in Namibia discovered a new source of very-high-energy gamma-rays from the direction of the globular cluster Terzan 5. Being very likely located in the outer ...
Jun 24, 2011 |
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High-energy surprises found in 'constant' Crab Nebula (w/ Video)
(PhysOrg.com) -- The combined data from several NASA satellites has astonished astronomers by revealing unexpected changes in X-ray emission from the Crab Nebula, once thought to be the steadiest high-energy ...
Jan 13, 2011 |
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Are TGFs Hazardous to Air Travelers?
Instruments scanning outer space for cataclysmic explosions called gamma-ray bursts are detecting intense flashes of gamma-ray energy right here in the friendly skies of Earth. These terrestrial gamma-ray ...
Space & Earth / Earth Sciences
Feb 11, 2010 |
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