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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 081126: afterglow photometry
  2. GRB 081126: Fermi GBM detection
  3. VLA Radio upper limit on GRB 081126
  4. GRB 081126: Swift observations continuing
  5. GRB 081126: GRT Optical Observation
  6. GRB 081126: Confirmation of the Optical Afterglow
  7. Konus-Wind observation of GRB 081126
  8. GRB 081126: Swift-XRT refined analysis
  9. GRB 081126: Swift/UVOT Observations
  10. GRB 081126: optical observations
  11. GRB 081126: Swift-BAT refined analysis
  12. GRB 081126: Enhanced Swift-XRT position
  13. GRB 081126: TAROT Calern observatory optical observations
  14. GRB 081126: Swift detection of a burst

Advanced

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