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Gamma-ray bursts active longer than thought
05-22-2007 · EurekAlert!Using NASA's Swift satellite, astronomers have discovered that energetic flares seen after gamma-ray bursts are not just hiccups, they appear to be a continuation of the burst itself.
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Keywords: gamma-ray, bursts, active, longer, thought, gamma, ray, burst
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- Intergalactic 'shot in the dark' shocks astronomers
12-18-2007 · EurekAlert!
A team of astronomers has discovered a cosmic explosion that seems to have come from the middle of nowhere -- thousands of light-years from the nearest galaxy-sized collection of stars, gas, and dust. This "shot in the dark" is surprising because the type of explosion, a long-duration gamma-ray burst, is thought to be powered by the death of a massive star.
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- Mystery cosmic explosions
12-20-2006 · EurekAlert!
Scientists have discovered what appears to be a new kind of cosmic explosion, the subject of four articles in this week's issue of Nature. They call the explosion a hybrid gamma-ray burst.As with other gamma-ray bursts, this hybrid burst is likely signalling the birth of a new black hole. It is unclear, however, what kind of object or objects exploded or merged to create the black hole or, perhaps, something even more bizarre.
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- Gamma-ray burst challenges theory
03-08-2007 · EurekAlert!
In a series of landmark observations gathered over a period of four months, NASA's Swift satellite has challenged some of astronomers' fundamental ideas about gamma-ray bursts (GRBs), which are among the most extreme events in our universe. GRBs are the explosive deaths of very massive stars, some of which eject jets that can release in a matter of seconds the same amount of energy that the sun will radiate over its 10-billion-year lifetime.
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- The dark side of nature: The crime was almost perfect
12-20-2006 · EurekAlert!
Nature has again thrown astronomers for a loop. Just when they thought they understood how gamma-ray bursts formed, they have uncovered what appears to be evidence for a new kind of cosmic explosion. These seem to arise when a newly born black hole swallows most of the matter from its doomed parent star.
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- EuroNews looks at Integral
06-08-2007 · European Space Agency (ESA)
Integral is the first space observatory that can simultaneously observe objects in gamma rays, X-rays, and visible light. Its principal targets are gamma-ray bursts, powerful supernova explosions, and regions in the Universe thought to contain black holes. EuroNews talks to various scientists who are obtaining fascinating results from this laboratory.
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- Astronomers discover new kind of black-hole explosion
12-20-2006 · EurekAlert!
Scientists have discovered what appears to be a new kind of cosmic explosion -- a "hybrid gamma-ray burst" -- which will be the subject of four articles to be published in the journal Nature on 21 December 2006. The scientists include four astrophysicists at Penn State University as well as others around the globe. The nature of the explosion is a puzzle in "virtually uncharted territory" for space scientists.
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- NASA and Gemini probe mysterious explosion in the distant past
01-08-2008 · EurekAlert!
Using the powerful one-two combo of NASA's Swift satellite and the Gemini Observatory, astronomers have detected a mysterious type of cosmic explosion farther back in time than ever before. The explosion, known as a short gamma-ray burst, took place 7.4 billion years ago, more than halfway back to the Big Bang.
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- Astronomers find record-old cosmic explosion
01-09-2008 · EurekAlert!
Astronomers have detected a mysterious type of cosmic explosion, a short gamma ray burst, farther back in time than ever before: 7.4 billion years, more than halfway back to the Big Bang.
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- Worldwide hunt to solve the mystery of gamma-ray bursts
02-16-2008 · EurekAlert!
UK space scientist Emeritus Professor Alan Wells is to speak at the American Association for the Advancement of Science in Boston in February on "International Cooperation in Developing Swift and its Scientific Achievements."
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- Gamma-ray birth cries suggest massive magnetic engines
03-08-2007 · EurekAlert!
A gamma-ray burst observed by NASA's Swift satellite on July 29, 2006, generated an X-ray afterglow that remained detectable to the spacecraft's X-ray Telescope (XRT) for 125 days -- an astonishing long time -- indicating the possible formation of a magnetar. If Chandra or XMM-Newton can see the afterglow later this year, GRB 060729 will break the record for longest observed X-ray afterglow.
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