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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"

42855 results found.

  1. GRB980329 sub-millimeter observations
  2. GRB980329 IPN annulus
  3. GRB980329 optical observations
  4. GRB980329 near-IR observations
  5. GRB980329 near-IR observations
  6. GRB980329 optical observations
  7. GRB980329 infrared observations
  8. GRB980329 optical observations
  9. GRB980326 optical observations
  10. GRB980329 optical observations
  11. GRB980329 VLA observations
  12. GRB980329 near IR observations
  13. GRB980329 optical observations
  14. GRB980329 optical observations
  15. GRB980329 optical observations
  16. GRB980326 optical observations
  17. GRB980326 optical observations
  18. GRB980326 optical observations
  19. GRB980326 optical observations
  20. GRB970508 SAO RAS optical observations
  21. Optical Observations of GRB 970508
  22. GRB 971214: Redshift from Keck Observations
  23. Near-IR follow-up on GRB 971227
  24. GRB971214: Keck R & I-band Observations
  25. GRB 971227: Optical Observations
  26. Optical Observations of the GRB 971227 field
  27. Optical Observations on GRB 971227
  28. GRB971227: Plaskett R-band observations
  29. GRB 971227: Optical clarifications
  30. Optical Observations for GRB 971227
  31. GRB971227: Further CAHA R-band images
  32. GRB971227: LOTIS observations
  33. GRB 971227: CAHA R-band images
  34. GRB 971227: Optical observations
  35. GRB971214: Optical Observations and Calibrations
  36. Sub-millimeter Observations of GRB 971214 at the JCMT
  37. GRB 971214: EUVE Observations
  38. GRB 971214: Redshift from Keck Optical Observations
  39. GRB 971214: Redshift from Keck Optical Observations
  40. GRB 971214: Apache Point Observatory Optical Observations
  41. GRB 971214: KPNO Optical Observations
  42. Optical Observations of GRB 971214 at Keck
  43. GRB 971214: Optical Observations
  44. Radio Observations of GRB 971214 at the VLA
  45. GRB 971214: USNOFS Observations Summary
  46. GRB 971024: KPNO Optical Observations Summary
  47. GRB 971024: Refined analysis by USNOFS Observations
  48. GRB 971024: KPNO Optical Observations
  49. GRB 971024: USNO Observations
  50. GRB 970925: BATSE Localization
  51. IRAS 18119-1342 and the possible new SGR
  52. Possible new SGR from US Naval Observatory
  53. RXTE Observations of SGR 1814-13
  54. GRB 970828: Palomar Observations
  55. GRB 970228: Keck/LRIS Optical Observations

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