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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"

6 results found.

  1. GRB 060322: LNA optical limit
  2. GRB 060322: Confirmation of Swift XRT afterglow
  3. GRB 060322: IAC80 optical observations
  4. GRB 060322: Swift XRT afterglow candidate
  5. GRB 060322: Refined analysis of the Swift-BAT burst
  6. GRB 060322: Swift-BAT detection of a 200-sec burst

Advanced

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