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GCN: The Gamma-ray Coordinates Network (TAN: Transient Astronomy Network)



The processing of Circulars to the Archive page was stopped (from ~01:30 to ~18:00 UT 01 Dec 2020).
The Circulars Archive page has been fixed as of ~18:00 UT 01 Dec 2020.
(The Circulars WERE ALWAYS BEING DISTRIBUTED -- it is only the archive web page (and sub-pages) that had problems.)



Posted 23 Mar 2020 (updated 27 Mar 2020, 04 Apr 2020, 03 May 2020, 08 May 2020; 10 Aug 2020, and 18 Oct 20):
Due to the policies and constraints during the CoronaVirus pandemic,
my response to your requests and questions may not be as fast as normal.
Example: changes to your site_configuration may take up to 7 days (instead of the usual 2-4 days).
Being at home teleworking, requires making the site_config file change a remote operation instead of the normal on-site operation.
Wich is doable, but I try to keep that method to a minimum. I will wait longer to do the file change
or I will use a weekly 4-hr pass to do work on-site.

The GCN system distributes:
  1. 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).
  2. Reports of follow-up observations (the Circulars) made by ground-based and space-based optical, radio, X-ray, TeV, and other particle observers.
These two functions provide a one-stop shopping network for follow-up sites and GRB and transient researchers.

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.

System Status
System Status: Latest update: 05 Nov 2020 (UT)
What's New
What's New: Latest update: 31 Jul 2020 (UT)

thumbnail of GCN physical network
The physical GCN network. (Click to enlarge.)

Latest Gamma-Ray Bursts

GCN Circulars Archive     Circs by Burst
GCN Reports Archive


The GCN/TAN contact is: Scott Barthelmy, scott@milkyway.gsfc.nasa.gov, (301)-286-3106
(or scottgcn@gmail.com if the Goddard email is down).

A service of the HEASARC at the Astrophysics Science Division (ASD) at NASA's GSFC.

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  • Curator: Teresa Sheets
  • Responsible NASA Official: Phil Newman
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    This file was last modified on Tuesday, 01-Dec-2020 19:05:15 EST