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Keyword: grbs

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  • Unusually long and repeating gamma-ray burst, 'unlike any other seen,' baffles astronomers

    09/22/2025 9:49:23 AM PDT · by Red Badger · 43 replies
    Earth.Com ^ | Eric Ralls
    Earlier this year, astronomers watched a burst of high-energy light that kept roaring back for nearly a full day. Gamma-ray bursts (GRBs) are usually sorted into short and long events, and they generally last from milliseconds to a few minutes. In a new study, researchers describe a signal named GRB 250702B that fired three distinct times over a few hours, with soft X-rays flaring even earlier. The team also reported evidence that the source lies beyond our galaxy. Lead researchers Antonio Martin-Carrillo of University College Dublin (UCD) and Andrew J. Levan of Radboud University (RU) directed the effort. Their teams...
  • Space Telescope Sifts Earth Storms for Radiation Flashes

    02/20/2010 3:28:40 PM PST · by NormsRevenge · 8 replies · 394+ views
    Space.com ^ | 2/20/10 | Jeremy Hsu
    A NASA space telescope hunting for the most powerful explosions in the universe is turning its eye on Earth to hunt for tiny flashes of radiation to determine if they pose a rare, but deadly, threat to high-flying commercial airliners. NASA's Fermi Gamma-Ray Space Telescope has joined the search for mysterious gamma-ray flashes above thunderstorms which are ultra-brief, but could be a concern for air travelers, researchers said. Just one millisecond blast of the so-called terrestrial gamma-ray flashes (TGFs) could expose passengers and crew aboard a nearby jet airliner to the same level of radiation as 400 chest X-rays, according...