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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 080903: Swift/UVOT Observations
  2. GRB 080903: Swift-XRT Refined Analysis
  3. GRB 080903: Enhanced Swift-XRT position
  4. GRB 080903, Swift-BAT refined analysis
  5. GRB 080903: optical observations
  6. GRB 080903: Liverpool Telescope observations
  7. GRB 080903: Astrotel-Caucasus optical observations
  8. GRB 080903: Optical afterglow candidate
  9. GRB 080903: TAROT Calern observatory optical observations
  10. GRB 080903: ROTSE-III Optical Limits
  11. GRB 080903: Swift detection of a burst

Advanced

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