Gravitational waves have been detected from a binary neutron star merger event, GW170817. Scientists report the detection of a counterpart radio source that appears 16 days after the event, allowing them to diagnose the energetics and environment of the merger.

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Gravitational waves have been detected from a binary neutron star merger event, GW170817. Scientists report the detection of a counterpart radio source that appears 16 days after the event, allowing them to diagnose the energetics and environment of the merger.