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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"

12 results found.

  1. Radio observation of GRB 090201 with ATCA
  2. Konus-Wind observation of GRB 090201
  3. GRB 090201: Swift-XRT refined analysis
  4. GRB090201: Swift UVOT upper limits
  5. GRB 090201: object inside the enhanced XRT error circle
  6. GRB 090201: Enhanced Swift-XRT position
  7. GRB 090201: VLT NIR observations
  8. GRB 090201: Swift-BAT refined analysis
  9. GRB 090201: VLT afterglow candidate
  10. GRB 090201: Swift-XRT detection of the possible X-ray afterglow
  11. GRB 090201: ROTSE-III Optical Limits
  12. GRB 090201: Swift detection of a burst

Advanced

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