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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"

9 results found.

  1. GRB060806 is similar to previous activity of SGR1806-20
  2. GRB 060717: Swift XRT refined analysis
  3. GRB 060717: NOT observations
  4. GRB 060717 optical upper limit
  5. GRB060717: Swift/UVOT upper limits
  6. GRB 060717: Swift XRT refined position
  7. GRB 060717: Swift-BAT refined analysis
  8. GRB 060717, optical observation
  9. GRB 060717: Swift detection of a burst

Advanced

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