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Old 13-07-2018, 11:50 AM
gary
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The IceCube Neutrino Detector at the South Pole Hits Paydirt

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Originally Posted by Stephen Cass, IEEE Spectrum, 12 July 2018

After 3.9 billion years of hurtling unhindered through the vast reaches of the universe, a ghostly neutrino particle died on 22 September 2017. It was annihilated when it collided with an atom in the frozen darkness two kilometres beneath the surface of the south polar ice cap.

But this subatomic particle’s death did not go unmarked. It was announced today in Science that its moment of passing—labelled neutrino event 170922A—triggered a world-wide cascade of astronomical observations using a raft of varied technologies. And these led to the first ever identification of the birthplace of a neutrino from outside our galaxy: in this case, the unimaginably violent cosmic forge of a blazar.

Blazars are incredibly bright natural sources of radio waves. They form when some of the swirling material falling into a supermassive black hole is converted into a hot radiating soup of elementary particles and then gets blasted back out into space in the form of twin jets moving at close to the speed of light. Tracing the 170922A neutrino back to a blazar known as TXS 0506+056, located billions of light years away in the Orion constellation, required the rapid coordinated response of a network of observatories around the world and in orbit above it.

The initial observation that kicked this so-called multimessenger observation campaign off was made by the IceCube detector at the South Pole.
Story here :-
https://spectrum.ieee.org/tech-talk/...e-hits-paydirt
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