About the GCN/TAN A Brief Description There are two parts to the GRB Coordinates Network (GCN) (TAN: Transient Astronomy Network): (1) the real-time (and near real-time) distribution of GRB locations, images, spectra, & lightcurves, (in < 2sec inside GCN) detected by various spacecraft (Swift, Fermi, MAXI, INTEGRAL, IPN, etc), and (2) the distribution of follow-up observation reports submitted by the GRB/transient community. INVITATION to Join/Subscribe (Notices & Circulars) An open invitation for GRB researchers and institutions to join GCN/TAN. For people wishing to receive the GCN/TAN Notices, the required pieces of information to set up an entry in the "sites.cfg" file are listed. And for those individuals wanting to receive/submit GCN Circulars, those requirements are also listed. Scientific Motivation and General Background Information on GRBs The history and the importance of research into the nature of Gamma-Ray Bursts. GCN/TAN Sites and Links The current observing sites participating in the GCN/TAN system are listed. Links are provided when available. Who we are The people that built and run the GCN/TAN system. What's new    (22 Nov 19) Brief descriptions of new capabilities and operational changes within the GCN/TAN system. Technical Details A Full Description of the GCN/TAN System: The Basic System Description, The Various Sources of GRB/transient Locations, Distribution Methods, Coordinates Accuracy, Improvements Made to the System, Future Improvements to the System, Detailed Technical Descriptions and Specifications, Related Services and Activities, Real-time Aspects of these Webpages. Mission-Instrument Notices at-a-Glance Clicking the links will take you to the Description/Documentation pages and to the tables of archived past Notices. ACTIVE OLD   INACTIVE Description Notice Archive Description Notice Archive IPN   CGRO n/a KONUS table BeppoSAX table INTEGRAL GRBs table NEAR table INTEGRAL SPI-ACS table ALEXIS table Swift GRBs table HETE table Swift GND_ANALYSIS table MILAGRO table Swift BAT SubSubThresh table XTE-PCA,   -ASM table Swift BAT Monitor table Suzaku table AGILE GRBs table     AGILE MCAL table     Fermi GRBs table     Fermi GBM Subthresh table     Fermi LAT Monitor&Trans table     MAXI table     MOA table     SNEWS table     SK_SN table     CALET table     AMON Gold&Bronze table AMON EHE table AMON HAWC table AMON HESE table AMON NU_EM table     AMON CASCADE table     LIGO/Virgo table     GECAM table     Counterpart table     Coincidence table     SIMBAD-NED n/a

The GCN/TAN contact is: Scott Barthelmy. For questions or subscription changes, please contact the GCN Team. A service of the HEASARC at the Astrophysics Science Division (ASD) at NASA's GSFC. Astronomy Questions? Ask a High Energy Astronomer. NASA-specific Questions? Try the NASA Homepage or start at the NASA site map. Curator: Teresa Sheets Responsible NASA Official: Phil Newman NASA Privacy Statement, Disclaimer, and Accessibility Certification This file was last modified on Friday, 31-Jul-2020 18:00:57 EDT