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    Mysterious Cosmic Blast Keeps on Going By Ron Cowen, Science News Email Author April 8, 2011

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    mudra

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    Mysterious Cosmic Blast Keeps on Going      By Ron Cowen, Science News Email Author     April 8, 2011 Empty Mysterious Cosmic Blast Keeps on Going By Ron Cowen, Science News Email Author April 8, 2011

    Post  mudra on Sat Apr 09, 2011 3:10 pm

    Cosmic Blast Keeps on Going
    April 8, 2011


    Astronomers have witnessed a cosmic explosion so strange they don’t even know what to call it. Although the blowup, discovered with NASA’s Swift satellite on March 28, emits high-energy radiation like a gamma-ray burst would, the event has now lasted for 11 days. Gamma-ray bursts last for an average of about 30 seconds.

    Also unlike a gamma-ray burst, the explosion has faded and brightened, emitting staccato pulses of energetic radiation lasting for hundreds of seconds.

    “It’s either a phenomenon we’ve never seen before or a familiar event that we’ve never viewed in this way before,” says Andrew Fruchter of the Space Telescope Science Institute in Baltimore. The outburst might have been generated by a star torn to shreds when it ventured too close to a black hole in its host galaxy, he suggests. Gas from the star falling into the black hole could have triggered the gravitational monster to emit a jet of X-rays and gamma rays that by chance happens to point directly at Earth.

    Read on : http://www.wired.com/wiredscience/2011/04/cosmic-explosion-swift/

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