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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"

27577 results found.

  1. GRB 000313 - optical transient in the BATSE error box
  2. GRB 000214 ``Valentine's Day Burst'': BeppoSAX NFI Observation
  3. BATSE GRB trigger criterion changed
  4. GRB000210 X-ray afterglow
  5. GRB 000210: BATSE Observations
  6. GRB000201 Optical Observations
  7. GRB 000201: TAROT optical observations
  8. BATSE GRB trigger criteria changed
  9. BATSE+IPN location of GRB000131
  10. BATSE location of GRB000126
  11. BATSE Observations of GRB000115
  12. Second RXTE Observation of GRB 000115
  13. Single IPN error box for GRB991229
  14. GRB 991216: Updated BATSE parameters
  15. GRB 991216--Summary of RXTE Observations
  16. GRB 991216: Extremely bright BATSE burst
  17. GRB991106: BeppoSAX/BATSE results
  18. BeppoSAX NFI Observation of GRB991106
  19. GRB 991105: BATSE Observations
  20. GRB991106, optical observation at SAO-RAS
  21. GRB 991106, LOTIS Optical Observations
  22. GRB991105: SAX-GRBM/-WFC detection
  23. BeppoSAX MAIL n. 99/30: GRB991105 refined position (fwd)
  24. GRB ALERT: GRB991105
  25. GRB 991014 - BeppoSAX NFI observations
  26. GRB991014 BATSE Observations
  27. Super-LOTIS optical observation of GRB991014
  28. BeppoSAX ALERT: GRB991014
  29. GRB 990915 optical observations
  30. BATSE GRB trigger criteria
  31. IPN error box for GRB990915 (=BATSE 7766)
  32. IPN localization of BATSE #7766 (GRB990915)
  33. GRB990806: BATSE Observations
  34. BeppoSAX ALERT GRB990806: Summer GRB
  35. BeppoSAX NFI Observation of GRB990705
  36. BeppoSAX NFI Observation of GRB990705
  37. GRB990704
  38. BeppoSAX NFI Observation of GRB990627 X-ray afterglow
  39. BeppoSAX: GRB990625
  40. X-ray/GRB 1SAX J0835.9+5118, BATSE Observation
  41. optical observation of the X-ray/GRB transient SAX J0835.9+5118
  42. BeppoSAX: A new fast X-ray transient
  43. GRB990510: X-ray afterglow
  44. GRB 990510: BATSE Observations
  45. GRB 990506: BATSE Observations
  46. GRB990323 PRECISE IPN POSITION
  47. GRB990316: simultaneous optical observation
  48. GRB990316 - Optical null results
  49. ASM/IPN error box for GRB 990308 (BATSE #7457)
  50. GRB 990308a and GRB 990308b
  51. BATSE Resumes Normal Operations
  52. Search for Potential Images of GRB 990123
  53. Search for Potential Images of GRB 990123
  54. GRB990123, OSSE observations
  55. GRB 990123: Strong MeV CGRO-COMPTEL detection now posted on WWW
  56. GRB 990123: BATSE Observations
  57. GRB990123, early optical counterpart detection
  58. GRB990123, BeppoSAX WFC detection and NFI planned follow-up
  59. Possible identification of SN1999E with GRB980910
  60. GRB 980923 BATSE Observations
  61. GRB980703 - BeppoSAX/GRBM detection
  62. GRB 980703: BATSE Observations
  63. RXTE Observation of GRB 980706
  64. GRB980703: LOTIS observation at early times
  65. GRB 980703: ASM Position & Intensity
  66. GRB 980613: BATSE Observations
  67. SGR1627-41, BeppoSAX-GRBM detections
  68. Discovery of a new SGR source, SGR1627-41
  69. BATSE on-board GRB trigger change
  70. GRB980519 BATSE Observations
  71. BATSE on-board GRB trigger change
  72. GRB980519, BeppoSAX-WFC updated position
  73. GRB980519, BeppoSAX-WFC position
  74. GRB980425 BATSE observations
  75. GRB 971024: Refined analysis by USNOFS Observations
  76. GRB 971024: USNO Observations
  77. GRB 970925: BATSE Localization

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