|The Parkes Telescope|
Generally,this kind of burst of radio waves caused by an exploding star which give off light or X-rays or gamma rays for some time.
But in this case, the source of radio waves are unidentified.There is also a theory suggesting that this bursts could be generated by intelligent beings intentionally beaming a radio signal directly at Earth.
The first of these cosmic outbursts was detected in 2007. Last year, a radio telescope in Puerto Rico also detected a brief and powerful radio wave.
According EarthSky, the astronomers involved with this study said that the burst was originated up to 5.5 billion light-years from Earth.If that is true, then the sources of this burst must be extremely powerful.
The study was published in the monthly notices of Royal Astronomical Society.