The Gamma-Ray Burst Coordinate Network (GCN) is a computer service that receives alerts about GRBs from a myriad of space-bourne and ground-based instruments and immediately distributes those results around the world (and off it) via automated email, internet socket, cell phone, and alphanumeric pager messages. It is because of this network that it is even possible for automated robotic telescope systems to respond quickly to GRB detections.

The GCN also provides an email mailing list for the rapid distribution of current results regarding contemporary GRB observations, so scientists can inform their colleagues in an up-to-the-minute fashion as to what their instruments are showing, which in turn will aid other scientists in choosing how to stage their own observations.

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