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LIGO detects no gravitational waves from gamma ray burst

  1. Jan 23, 2008 #1

    SF

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    On February 1, 2007, the Konus-Wind, Integral, Messenger, and Swift gamma-ray satellites measured a short but intense outburst of energetic gamma rays originating in the direction of M31, the Andromeda galaxy, located 2.5 million light-years away. The majority of such short (less than two seconds in duration) gamma-ray bursts (GRBs) are thought to emanate from the merger and coalescence of two massive but compact objects, such as neutron stars or black-hole systems. They can also come from astronomical objects known as soft gamma-ray repeaters, which are less common than binary coalescence events and emit less energetic gamma rays.

    During the intense blast of gamma rays, known as GRB070201, the 4-km and 2-km gravitational-wave interferometers at the Hanford facility were in science mode and collecting data. They did not, however, measure any gravitational waves in the aftermath of the burst.

    That non-detection was itself significant.

    http://www.spaceref.com/news/viewpr.html?pid=24501
     
  2. jcsd
  3. Jan 23, 2008 #2
    Hi SF,

    Very interesting! Can someone describe what a "soft gamma-ray repeater" is?

    Jon
     
  4. Jan 23, 2008 #3

    wolram

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    Gold Member

    It is supposed to be a Magnetastar (spelling) another cosmological oddity, or that is what i have read.

    Edit

    http://en.wikipedia.org/wiki/Soft_gamma_repeater
     
    Last edited: Jan 23, 2008
  5. Jan 23, 2008 #4

    wolram

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    Gold Member

  6. Jan 23, 2008 #5
  7. Jan 23, 2008 #6

    wolram

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    Oh no i just meant it as a way gamma rays can come from things that would not produce gravitational radiation.
     
  8. Jan 23, 2008 #7
    Oh, I see.
     
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