General Coordinates Network

This includes neutrino detections by observatories such as IceCube or Super-Kamiokande, gravitational wave events from the LIGO, Virgo and KAGRA interferometers, and gamma-ray bursts observed by Fermi, Swift or INTEGRAL.

The second function of BACODINE was collecting right ascension and declination locations of GRBs detected by spacecraft other than CGRO, and then distributing that information.

Notices are machine-readable alerts, which are distributed in real time; they typically include only basic information about the event.

For the historical gamma-ray burst observatories, which are based on spacecraft, this involves sending the information to a ground station; NASA Goddard Space Flight Center was the center in charge of sending the notices from GRB observatories.

As of April 2023, 14 missions are sending alerts to the GCN :[1] Past spacecraft and instruments that participated in GCN include Array of Low Energy X-ray Imaging Sensors (ALEXIS), BeppoSAX, the Imaging Compton Telescope (COMPTEL) on CGRO, the X-Ray/Gamma-Ray Spectrometer (XGRS) on NEAR Shoemaker, the High Energy Transient Explorer (WMM and SXC), the Rossi X-ray Timing Explorer (PCA and ASM) and Ulysses.