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Loading contentThe public alert system of the LIGO–Virgo–KAGRA collaboration, which issues automated notices — within seconds to minutes — whenever the detectors flag a candidate gravitational-wave event, so that telescopes around the world can begin the hunt for a counterpart. The alerts are distributed through GCN.
Facts on this topic will be cited from these primary and reference sources.
Direct detections of gravitational waves from compact-object mergers.