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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"

27 results found.

  1. GRB 251006B/EP251006a: EP-FXT follow-up observation
  2. GRB 080205: OA evolution from KAIT observations
  3. GRB060206: optical observation
  4. GRB 060206: Confirmation of Rapid Fading at Optical Wavelengths
  5. GRB 060206: SOAR Detections
  6. GRB060206, optical observations
  7. GRB 060206: Swift/UVOT Observations
  8. GRB 060206: near-infrared observations (JK' imaging)
  9. GRB 060206: WSRT Radio Observations
  10. GRB 060206: TTT Observations
  11. GRB 060206: More PROMPT Detections
  12. GRB 060206: Tenagra II Observations
  13. GRB 060206: PROMPT Detections
  14. GRB 060206: optical observations at Asiago
  15. GRB 060206: Subaru/FOCAS optical spectroscopy
  16. GRB 060206: IR Detection of the Afterglow
  17. GRB 060206: Lick 3m Spectroscopy
  18. GRB 060206: Super-LOTIS observations
  19. GRB 060206: Swift-BAT refined analysis
  20. GRB 060206 : Lulin optical observations
  21. GRB060206: Swift XRT Refined Analysis
  22. GRB 060206: Spectroscopic Redshift
  23. GRB060206: P60 Optical Observations
  24. GRB 060206: KAIT observations
  25. GRB060206: Swift XRT Position
  26. GRB 060206: RAPTOR observations of afterglow candidate variability.
  27. GRB 060206: High redshift burst

Advanced

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