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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. GRB 231210B: BOOTES-7 optical upper limit
  2. GRB 231210B: new optical transient detected with the Greenhill Observatory University of Tasmania within the BAT-Swift enhanced position
  3. Konus-Wind detection of GRB 231210B
  4. ATCA observations of GRB 231210B
  5. GRB 231210B: REM optical/NIR upper limits
  6. GRB 231210B: MeerLICHT afterglow observations
  7. GRB 231210B: Swift-BAT refined analysis
  8. GRB 231210B: Swift-XRT refined Analysis
  9. GRB 231210B: Enhanced Swift-XRT position
  10. GRB 231210B: VLT/X-shooter redshift
  11. GRB 231210B: detection of the optical counterpart with the LCOGT 40cm telescope at Sutherland Observatory
  12. GRB 231210B: Swift detection of a burst with optical counterpart

Advanced

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