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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"

11 results found.

  1. GRB 070616: No Evidence for I Band Afterglow
  2. GRB 070616 : WIDGET simultaneous optical observations
  3. GRB 070616: Suzaku/WAM observation of the prompt emission
  4. GRB070616: Optical Observation by MITSuME Okayama
  5. GRB 070616, Swift-BAT further refined analysis
  6. GRB 070616: Swift XRT refined circular
  7. GRB 070616: BTA astrometry and finding chart
  8. GRB 070616: BTA optical observations
  9. GRB 070616: TLS observation
  10. GRB 070616, Swift-BAT partial refined analysis
  11. GRB 070616: Swift detection of a burst

Advanced

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