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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"

38437 results found.

  1. GRB980329 optical observations
  2. GRB980329 optical observations
  3. GRB980326 optical observations
  4. GRB980326 optical observations
  5. GRB980326 optical observations
  6. GRB980326 optical observations
  7. GRB970508 SAO RAS optical observations
  8. Optical Observations of GRB 970508
  9. GRB 971214: Redshift from Keck Observations
  10. Near-IR follow-up on GRB 971227
  11. GRB971214: Keck R & I-band Observations
  12. Optical Observations of the GRB 971227 field
  13. Optical Observations on GRB 971227
  14. GRB971227: Plaskett R-band observations
  15. GRB 971227: Optical clarifications
  16. GRB971227: Further CAHA R-band images
  17. GRB971227: LOTIS observations
  18. GRB 971227: CAHA R-band images
  19. GRB 971227: Optical observations
  20. GRB971214: Optical Observations and Calibrations
  21. Sub-millimeter Observations of GRB 971214 at the JCMT
  22. GRB 971214: Redshift from Keck Optical Observations
  23. GRB 971214: Redshift from Keck Optical Observations
  24. GRB 971214: Apache Point Observatory Optical Observations
  25. GRB 971214: KPNO Optical Observations
  26. Optical Observations of GRB 971214 at Keck
  27. GRB 971214: Optical Observations
  28. Radio Observations of GRB 971214 at the VLA
  29. GRB 971214: USNOFS Observations Summary
  30. GRB 971024: KPNO Optical Observations Summary
  31. GRB 971024: KPNO Optical Observations
  32. GRB 971024: USNO Observations
  33. IRAS 18119-1342 and the possible new SGR
  34. Possible new SGR from US Naval Observatory
  35. RXTE Observations of SGR 1814-13
  36. GRB 970828: Palomar Observations
  37. 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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