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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"

13 results found.

  1. GRB 060807: Detection of a possible host galaxy
  2. GRB060806 is similar to previous activity of SGR1806-20
  3. GRB 060807: UVOT Upper limits
  4. GRB 060807: afterglow confirmation
  5. GRB 060807: XRT Team refined analysis
  6. GRB 060807: K- and R-band observations
  7. GRB 060807: Refined analysis of the Swift-BAT burst
  8. GRB060807: optical afterglow candidate
  9. GRB060807: optical upper limit in white light
  10. GRB 060807, optical observation
  11. GRB 060807: Kanazawa R-band observation
  12. GRB 060807: optical limit
  13. GRB 060807: Swift detection of a burst

Advanced

Download all Circulars as a .tar.gz archive (updated once a day):
Questions or comments?
Contact GCN directly.
Have you found a bug in GCN?
Open an issue.
Want to contribute code to GCN?
Get involved on GitHub.

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