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Scientists have obtained the best view so far of the most powerful type of cosmic explosion, which happened this time in our cosmological “backyard.” Using
A typical gamma-ray burst usually takes place 20 billion light years away, but this one was observed only one billion light years away – giving scientists what they call a “front row” seat to the blast. “We could observe the afterglow for several days and to unprecedented gamma-ray energies,” DESY’s Andrew Taylor said.
This comparatively shorter distance meant that scientists could see the ‘colours’ – photon energies – of the radiation. The GRB had a spectrum up to an energy of 3.3 tera-electronvolts, which is approximately one trillion times as energetic as the photons of visible light.
For three days following the explosion, scientists were still able to track the afterglow – with findings that rewrite what scientists previously thought about radiation.