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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"

13 results found.

  1. GRB 210912A: LBT optical observations
  2. GRB 210912A: BOOTES-5/JGT optical afterglow candidate (Correction to GCNC 30823)
  3. GRB 210912A: Swift-BAT refined analysis
  4. GRB 210912A: Tautenburg observations
  5. GRB 210912A: CAHA 2.2m Detection
  6. GRB 210912A: Swift-XRT refined Analysis
  7. GRB 210912A: Swift/UVOT Detection
  8. GRB 210912A: Enhanced Swift-XRT position
  9. GRB 210912A: Host-galaxy candidate in PanSTARRS
  10. GRB 210912A: Mondy optical afterglow confirmation
  11. Swift GRB 210912A: Global MASTER-Net observations report
  12. GRB 210912A: BOOTES-5/JGT optical afterglow candidate
  13. GRB 210912A: Swift detection of a burst

Advanced

Download all Circulars as a .tar.gz archive (updated once a day):
Questions or comments?
Contact GCN directly.
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Open an issue.
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Get involved on GitHub.

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