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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"

6 results found.

  1. VLT/UVES spectroscopy of GRB050820
  2. GRB 050820: Early RAPTOR detections
  3. GRB 050820 Swift-BAT refined analysis
  4. GRB 050820: P60 Temporal Decay Index
  5. GRB 050820: High Resolution Spectroscopy from Keck
  6. GRB 050820: Swift detection of a GRB

Advanced

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