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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."

Keywords: worldwide, hunt, solve, mystery, gamma-ray, bursts, gamma, ray, burst

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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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Robotic telescope unravels mystery of cosmic blasts
03-16-2007 · EurekAlert!
Scientists have used the world's largest robotic telescope to make the earliest-ever measurement of the optical polarisation* of a Gamma Ray Burst (GRB) just 203 seconds after the start of the cosmic explosion. This finding, which provides new insight into GRB physics, is published in Science today (15th March 2007).
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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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Matter flashed at ultra speed
06-12-2007 · EurekAlert!
Using a robotic telescope at the ESO La Silla Observatory, astronomers have for the first time measured the velocity of the explosions known as gamma-ray bursts. The material is travelling at the extraordinary speed of more than 99.999 percent of the velocity of light, the maximum speed limit in the universe.
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Exclusion of common bile duct stones prior to gallstone operations
10-30-2007 · EurekAlert!
In the era of laparoscopic surgery, intra-operative X-ray investigation of bile ducts to identify coexisting common bile duct stones has been replaced by new techniques, which, unfortunately, are either too expensive and not available to all patients, or invasive and may result in severe complications. A study recently reported in the Nov. 21 issue of the World Journal of Gastroenterology may offer a simple and available measure to solve this problem worldwide.
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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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GROND takes off
07-07-2007 · EurekAlert!
A new instrument has seen first light at the ESO La Silla Observatory. Equipping the 2.2-m MPI/ESO telescope, GROND takes images simultaneously in seven colors. It will be mostly used to determine distances of gamma-ray bursts.
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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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Cosmic ray mystery solved?
11-08-2007 · EurekAlert!
The most energetic particles in the universe -- ultrahigh-energy cosmic rays -- likely come from supermassive black holes in the hearts of nearby active galaxies, says a study by scientists from nearly 90 research institutions worldwide, including the University of Utah.
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