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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"

21933 results found.

  1. GRB980326 optical observations
  2. GRB980326 optical observations
  3. GRB970508 SAO RAS optical observations
  4. Optical Observations of GRB 970508
  5. GRB 971214: Redshift from Keck Observations
  6. GRB971214: Keck R & I-band Observations
  7. GRB 971227: Optical Observations
  8. Optical Observations of the GRB 971227 field
  9. Optical Observations on GRB 971227
  10. GRB971227: Plaskett R-band observations
  11. Optical Observations for GRB 971227
  12. GRB971227: Further CAHA R-band images
  13. GRB971227: LOTIS observations
  14. GRB 971227: CAHA R-band images
  15. GRB 971227: Optical observations
  16. GRB971214: Optical Observations and Calibrations
  17. Sub-millimeter Observations of GRB 971214 at the JCMT
  18. GRB 971214: EUVE Observations
  19. GRB 971214: Redshift from Keck Optical Observations
  20. GRB 971214: Redshift from Keck Optical Observations
  21. GRB 971214: Apache Point Observatory Optical Observations
  22. GRB 971214: KPNO Optical Observations
  23. Optical Observations of GRB 971214 at Keck
  24. GRB 971214: Optical Observations
  25. Radio Observations of GRB 971214 at the VLA
  26. GRB 971214: USNOFS Observations Summary
  27. GRB 971024: KPNO Optical Observations Summary
  28. GRB 971024: Refined analysis by USNOFS Observations
  29. GRB 971024: KPNO Optical Observations
  30. GRB 971024: USNO Observations
  31. RXTE Observations of SGR 1814-13
  32. GRB 970828: Palomar Observations
  33. 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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