On March 28, 2011, Scientists recieved a huge amount of X-rays and γ-rays from a previously quite part of the universe. The rays were coming from centre of a small galaxy in Darco constellation about 3.9 billion light years away and were moving with speed very close to the speed of light (nearly 99.5% the speed of light). It probably took place when a star went too closer to a Black hole and and torn apart and swallowed the black hole due to gravitation.
When the star goes close to a Black hole strong tidal force of the Balck hole distort the star and it leads to the formation of a gaseous disk that moves in whirling motion around the black hole. Near the Black hole magnetic field produces a narrow jet of particles moving near speed of light.
In case of J1644+57 the jet pointed directly towards the Earth.
THIS EVENT WAS REALLY RARE AND WAS OBSERVED FOR THE FIRST TIME.