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GCN Circulars

GCN Circulars are rapid bulletins submitted by and distributed to the community. See the documentation for help with subscribing to or submitting Circulars.

Search for Circulars by submitter, subject, or body text (e.g. 'Fermi GRB').
To navigate to a specific circular, enter the associated Circular ID (e.g. 'gcn123', 'Circular 123', or '123').
Advanced Search

To narrow the search results, use advanced search syntax. This allows for specifying which circular field to search (submitter, subject, and/or body). For additional information, refer to the advanced search documentation.

Advanced Search Examples (click to copy):

subject:"Swift"
body:"GRB"
submitter:"Judith Racusin"

14 results found.

  1. GRB 170906A: Insight-HXMT detection
  2. GRB 170906A CALET Gamma-Ray Burst Monitor detection
  3. Konus-Wind observation of GRB 170906A
  4. GRB 170906A: AstroSat CZTI(Veto) detection
  5. GRB 170906A: Swift/UVOT Detection
  6. GRB 170906B: Swift-BAT refined analysis
  7. GRB 170906A: Fermi GBM detection
  8. GRB 170906A: Swift-BAT refined analysis
  9. GRB 170906A: Swift-XRT refined Analysis
  10. GRB 170906A: MASTER-OAFA (Argentina) early automatic OT detection
  11. GRB 170906A: Fermi-LAT detection
  12. GRB 170906A: REM optical/NIR observations
  13. GRB 170906A: Enhanced Swift-XRT position
  14. GRB 170906A: Swift detection of a burst with an optical afterglow

Advanced

Download all Circulars as a .tar.gz archive (updated once a day):
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