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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"

16 results found.

  1. Konus-Wind detection of GRB 220623A
  2. GRB 220623A: GIT optical upper limits.
  3. GRB 220623A: T193-OHP optical upper limit
  4. GRB 220623A: Swift-BAT refined analysis
  5. Konus-Wind detection of GRB 220623A
  6. GRB 220623A: AbAO optical upper limit
  7. GRB 220623A: Swift-XRT refined Analysis
  8. GRB 220623A: NOT optical observations
  9. GRB 220623A: Swift/UVOT Upper Limits
  10. GRB 220623A: BOOTES-5/JGT optical afterglow detection
  11. GRB 220623A: Enhanced Swift-XRT position
  12. GRB 220623A: AGILE detection
  13. GRB 220623A: AstroSat CZTI detection
  14. GRB 220623A: iTelescope optical upper limit
  15. GRB 220623A: Swift-XRT observations
  16. GRB 220623A: Swift detection of a burst

Advanced

Download all Circulars as a .tar.gz archive (updated once a day):
Questions or comments?
Contact GCN directly.
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Open an issue.
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Get involved on GitHub.

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