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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 091109B: Suzaku WAM observation of the prompt emission
  2. GRB 091109B: Swift/UVOT Upper Limits
  3. GRB 091109B: VLT afterglow confirmation
  4. GRB 091109B: Swift-XRT Team refined analysis
  5. GRB 091109B: VLT observations
  6. GRB 091109b: Magellan Observations
  7. GRB 091109B: Swift-BAT refined analysis
  8. GRB 091109B: Enhanced Swift-XRT position
  9. GRB 091109B: Optical limits from Watcher
  10. GRB 091109B: ROTSE-III Optical Limits
  11. GRB 091109B: Swift detection of a short burst

Advanced

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