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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. GRB 080307: GAO 150cm telescope Optical Observation
  2. GRB 080307: NIR upper limit
  3. GRB 080307: Swift-XRT Team refined analysis
  4. GRB 080307: Swift/UVOT Upper Limits
  5. GRB 080307: Early RAPTOR Limits
  6. GRB 080307, Swift-BAT refined analysis
  7. GRB 080307: TNT optical observation
  8. GRB080307: Optical upper limits
  9. GRB 080307: Gemini-N i-band observations - candidate afterglow
  10. GRB 080307: BOAO imaging - retraction and new limit
  11. GRB 080307: retraction of UVOT candidate
  12. GRB 080307: Enhanced Swift-XRT position
  13. GRB 080307, Preliminary Swift-BAT refined analysis
  14. GRB 080307 : BOAO optical afterglow observation
  15. GRB 080307: Optical observation with DMC/KANATA
  16. GRB 080307: 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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