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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"

36331 results found.

  1. Near-IR follow-up on GRB 971227
  2. GRB971214: Keck R & I-band Observations
  3. GRB 971227: Optical Observations
  4. Optical Observations of the GRB 971227 field
  5. Optical Observations on GRB 971227
  6. GRB971227: Plaskett R-band observations
  7. GRB 971227: Optical clarifications
  8. Optical Observations for GRB 971227
  9. GRB971227: Further CAHA R-band images
  10. GRB971227: LOTIS observations
  11. GRB 971227: CAHA R-band images
  12. GRB 971227: Optical observations
  13. Sub-millimeter Observations of GRB 971214 at the JCMT
  14. GRB 971214: EUVE Observations
  15. GRB 971214: Redshift from Keck Optical Observations
  16. GRB 971214: Redshift from Keck Optical Observations
  17. GRB 971214: Apache Point Observatory Optical Observations
  18. GRB 971214: KPNO Optical Observations
  19. Optical Observations of GRB 971214 at Keck
  20. GRB 971214: Optical Observations
  21. Radio Observations of GRB 971214 at the VLA
  22. GRB 971214: USNOFS Observations Summary
  23. GRB 971024: KPNO Optical Observations Summary
  24. GRB 971024: Refined analysis by USNOFS Observations
  25. GRB 971024: KPNO Optical Observations
  26. GRB 971024: USNO Observations
  27. GRB 970925: BATSE Localization
  28. IRAS 18119-1342 and the possible new SGR
  29. Possible new SGR from US Naval Observatory
  30. GRB 970828: Palomar Observations
  31. GRB 970228: Keck/LRIS Optical Observations

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