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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 120118B: host observations and redshift determination
  2. GRB 120118B: optical upper limit
  3. GRB 120118B: RTT150 optical observations
  4. GRB 120118B, Swift-BAT refined analysis
  5. GRB 120118B: TNG NIR observations
  6. GRB 120118B: Swift-XRT refined Analysis
  7. GRB 120118B : Lulin Optical limit
  8. GRB 120118B: Swift/UVOT Upper Limits
  9. GRB 120118B: NOT observations
  10. GRB 120118B: Enhanced Swift-XRT position
  11. GRB 120118B: Faulkes Telescope South observations
  12. GRB 120118B: Swift-XRT position
  13. GRB 120118B: MASTER optical observations
  14. GRB 120118B: Swift detection of a burst

Advanced

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