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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 060926: MASTER: discovery of the optical flare
  2. VLA observations of GRB 060926
  3. GRB 060926: Swift-UVOT UVW1 Detection Retraction
  4. GRB060926: improved redshift
  5. GRB 060926: MASTER: first minutes decay
  6. GRB 060926: Swift-UVOT Detections
  7. GRB 060926: OPTIMA-Burst -- further observations
  8. GRB 060926: Swift XRT refined analysis
  9. GRB 060926, Swift-BAT refined analysis
  10. GRB 060926: MASTER OT alert observation
  11. GRB 060926: RTT150, UVOT afterglow candidate confirmation
  12. GRB 060926: BOOTES-IR observations
  13. GRB 060926: Watcher observations
  14. GRB060926 OPTIMA-Burst optical observation
  15. GRB 060926: MASTER optical observation
  16. GRB 060926: Swift detection of a burst

Advanced

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