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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"

13 results found.

  1. GRB260225A: SVOM/ECLAIRs refined position
  2. GRB 260204A: SVOM/ECLAIRs refined analysis
  3. GRB 260204A: Swift-XRT afterglow detection
  4. GRB 260204A: Swift/UVOT Upper Limits
  5. GRB 260204A: SVOM/VT confirms fading of the optical afterglow
  6. GRB 260204A: Swift-XRT observations
  7. GRB 260204A: LCO optical afterglow detection
  8. GRB 260204A: SVOM/VT optical candidate
  9. GRB 260204A : MASTER Global robotic net optical observations
  10. Fermi GBM Sub-Threshold Detection of GRB 260204A
  11. GRB 260204A: GOTO optical upper limit
  12. GRB 260204A: LCO optical upper limits
  13. GRB 260204A: SVOM detection of a burst

Advanced

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