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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 140103A: MASTER-Net early OT detection
  2. GRB 140103A: optical upper limit
  3. GRB 140103A: AAO optical afterglow candidate
  4. GRB 140103A: Swift XRT afterglow confirmation
  5. GRB 140103A: Lulin Optical r-band Observations
  6. GRB 140103A: P60 Observations
  7. GRB 140103A: Swift/UVOT Upper Limits
  8. GRB 140103A: Swift-XRT refined analysis
  9. GRB 140103A, Swift-BAT refined analysis
  10. GRB 140103A: MASTER-Net optical observations
  11. GRB 140103A: Swift detection of a burst

Advanced

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