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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"

14 results found.

  1. GRB 090726 R band observations
  2. GRB 090726: Skynet/GORT Observations
  3. GRB 090726: optical observation
  4. GRB 090726: GRT Optical Observation
  5. GRB090726: Swift/UVOT observations
  6. GRB 090726, Swift-BAT refined analysis
  7. GRB 090726: Afterglow candidate photometryfrom Crni Vrh
  8. GRB 090726: D50 optical observations
  9. GRB 090726: Swift-XRT Team refined analysis
  10. GRB 090726: Enhanced Swift-XRT position
  11. GRB 090726: optical transient candidate
  12. GRB 090726: Swift/UVOT Finding Chart Observation
  13. GRB 090726: Swift-XRT position of probable counterpart
  14. GRB 090726: Swift detection of a burst

Advanced

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