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Gamma rays

Unprecedented Gamma-Ray Burst Observed in the Universe

Strategic Insights

— 1 min read

A team of astronomers has observed an explosion in the universe like no other, defying current understanding of gamma-ray bursts. The gamma-ray bursts, originating from outside the Milky Way galaxy, repeated several times over the course of a day. This phenomenon, known as GRB 250702B, was spotted through the European Southern Observatory's Very Large Telescope and has left scientists baffled.

Key Takeaways:

  • The GRB 250702B is unlike any other gamma-ray burst observed in the past 50 years, with its repeated and periodic activity challenging current understanding of these events.
  • The explosion lasted about a day, which is 100 to 1000 times longer than most gamma-ray bursts.
  • The event's proximity to the galactic plane initially suggested it originated within our galaxy, but the European Southern Observatory's Very Large Telescope pinpointed the exact location, revealing it to be extragalactic.
  • The host galaxy is estimated to be located a few billion light-years away, but further data is needed to refine this distance.
  • The true nature of the explosion remains a mystery, with possible explanations including a star being ripped apart by a black hole or a catastrophic destruction of a massive star.

Statistics:

  • Gamma-ray bursts typically last only milliseconds to minutes, but GRB 250702B lasted approximately a day.
  • The explosion's energy is estimated to be significantly more powerful than typical gamma-ray bursts.
  • The host galaxy is believed to be located a few billion light-years away, with further data required to determine the exact distance.
  • The observation was made using the European Southern Observatory's Very Large Telescope, the James Webb Space Telescope, and the Hubble Space Telescope.

Sources:

  • The Astrophysical Journal Letters
  • European Southern Observatory (ESO) Very Large Telescope
  • NASA's Fermi Gamma-ray Space Telescope
  • The Chinese Academy of Sciences with the European Space Agency (ESA) and the Max Planck Institute for Extraterrestrial Physics (Einstein Probe)
  • NASA/ESA Hubble Space Telescope
  • James Webb Space Telescope (joint project of NASA, ESA, and the Canadian Space Agency)
  • UCD School of Physics
  • Radboud University in The Netherlands

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