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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"

16 results found.

  1. GRB 260903A
  2. GRB 260903A: Swift-XRT observations
  3. GRB 260903A: Swift ToO observations
  4. GRB 260903A: SAO RAS optical upper limit
  5. GRB 260903A: J-band upper limit with WINTER
  6. GRB 260903A: SVOM/ECLAIRs refined analysis
  7. GRB260903A: Liverpool Telescope optical observations
  8. GRB 260903A: SAO RAS optical observations
  9. GRB 260903A: EP-FXT follow-up observation
  10. GRB 260903A: OHP/T193 optical afterglow detection
  11. GRB 260903A: NOT optical observations and afterglow fading
  12. GRB 260903A: LCO optical observations
  13. GRB 260903A: SVOM/VT optical candidate
  14. GRB 260903A: Retraction of optical counterpart of GCN 45501
  15. GRB 260903A: LCO optical counterpart detection
  16. GRB 260903A: SVOM detection of a soft faint burst

Advanced

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