GCN: The Gamma-ray Coordinates Network (TAN: Transient Astronomy Network)
UPDATE: Based on one data point out of over a 1000 copies distributed,
the recent Circular 22823 (redshift measurement on 180620B, z=1.1175)
there can be longer delivery delays out to 1 hour.
INITIAL: GSFC experienced a center-side internet problem (starting ~08:30 UT).
This affected email-based deliveries with 0.5-15 min delays.
And for socket-based deliveries there were no delays, but if a site broke its connection and tried to remake
there may have been problems.
As of 12:15 UT, things are getting better (much smaller delays).
The GCN system distributes:
These two functions provide a one-stop shopping network for follow-up sites
and GRB and transient researchers.
Locations of GRBs and other Transients (the Notices) detected by spacecraft (most in real-time while the burst is still bursting and
others are that delayed due to telemetry down-link delays).
Reports of follow-up observations (the Circulars) made by
ground-based and space-based optical, radio, X-ray, TeV, and other particle observers.
The GCN system can be explored using the links above and below.
Invitation to subscribe to the Notices or Circulars here. unsubscribe here.
Make a modification to an existing Notices site configuration here.
Invitation to producers to incorporate your events into GCN here.
The physical GCN network. (Click to enlarge.)