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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 180809B: AstroSat CZTI detection
  2. GRB 180809B: ePESSTO NTT NIR observations
  3. Konus-Wind observation of GRB 180809B
  4. GRB 180809B: Swift-XRT refined Analysis
  5. GRB 180809B: CrAO optical observations
  6. GRB 180809B, Swift-BAT refined analysis
  7. GRB 180809B: Swift/UVOT Detection
  8. GRB 180809B: CALET Gamma-Ray Burst Monitor detection
  9. GRB 180809B: VLT optical upper limits
  10. GRB180809B: MASTER Triple Independent Automatic OT Detection
  11. GRB 180809B: LCO Sutherland observations
  12. GRB 180809B: GROND Detection of the NIR Afterglow
  13. GRB 180809B: RATIR Optical Observations and Confirmation of Rapid Fading
  14. GRB 180809B: 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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