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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 120212A: Fermi GBM observation
  2. GRB 120212A: GMG optical observation
  3. GRB 120212A: MITSuME Ishigakijima Optical Observation
  4. GRB 120212A: Swift-XRT refined Analysis
  5. GRB 120212A: NOT optical observation
  6. GRB 120212A: Swift/UVOT Detection
  7. GRB 120212A: Swift-BAT refined analysis
  8. GRB 120212A: Errata of subject in GCNC 12936
  9. GRB 120212A: Enhanced Swift-XRT position
  10. GRB 120212A: Kanata/HOWPol optical observation
  11. GRB 120212A: Swift-XRT observations
  12. GRB 120212A: Swift/UVOT detection
  13. GRB 120212A: Faulkes Telescope South afterglow candidate
  14. GRB 120212A: Swift detection of a burst

Advanced

Download all Circulars as a .tar.gz archive (updated once a day):
Questions or comments?
Contact GCN directly.
Have you found a bug in GCN?
Open an issue.
Want to contribute code to GCN?
Get involved on GitHub.

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