gcn.nasa.gov

The General Coordinates Network (GCN) is NASA’s next-generation alert system that rapidly distributes real-time notifications of transient astronomical events, such as gamma-ray bursts and gravitational wave detections, to the global scientific community. It serves astronomers, astrophysicists, and mission operators who need immediate data to coordinate follow-up observations across multiple observatories and wavelengths. This system is interesting because it enables the burgeoning field of multimessenger astronomy, allowing scientists to capture fleeting cosmic phenomena as they happen and unlock new insights into the universe’s most violent events.