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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"

15 results found.

  1. GRB 160227A: MAXI/GSC detection
  2. GRB 160227A: LOAO 1.0m optical detection
  3. GRB 160227A: McDonald 0.8m Detection
  4. GRB 160227A: Swift/UVOT Detection
  5. GRB 160227A: MASTER prompt OT Detection and LC
  6. GRB 160227A: AROMA-N Optical Observation
  7. GRB 160227A: NOT redshift
  8. GRB 160227A, Swift-BAT refined analysis
  9. GRB 160227A: Swift-XRT refined Analysis
  10. GRB 160227A: Enhanced Swift-XRT position
  11. GRB 160227A: MAXI/GSC detection
  12. GRB 160227A: ISON-Kislovodsk optical observation
  13. GRB 160227A: Mt. Terskol observatory optical observation
  14. GRB 160227A: MASTER OT Detection
  15. GRB 160227A: Swift detection of a burst with an optical counterpart

Advanced

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