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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"

11 results found.

  1. GRB 121117A: Terskol obseravtions
  2. GRB 121117A: Optical observations
  3. GRB 121117A: optical upper limit
  4. GRB 121117A: GROND confirmation of the UVOT afterglow candidate
  5. GRB 121117A: Swift/UVOT Observations
  6. GRB 121117A: Swift-XRT refined Analysis
  7. GRB 121117A: MASTER prompt optical limit
  8. GRB 121117A, Swift-BAT refined analysis
  9. GRB 121117A: ROTSE-III Optical Limits
  10. GRB 121117A: BOOTES-3 early optical upper limit
  11. GRB 121117A: Swift detection of a burst

Advanced

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