Separation of GRBs by Machine Learning (IMAGE)
Caption
The figure indicates how similar different GRBs are to each other. Points which are closer together are more similar, and points which are further away are more different. What we find is that there are two distinct groups, one orange and the other blue. The orange dots appear to correspond to "short" GRB, which have been hypothesized to be produced by mergers of neutron stars, and the blue dots appear to correspond to "long" GRB, which might instead be produced by the collapse of dying, massive stars.
Credit
Johann Bock Severin, Christian Kragh Jespersen and Jonas Vinther
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