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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"

29091 results found.

  1. GRB010324: BeppoSAX/GRBM data
  2. GRB 010214: X-Ray afterglow
  3. GRB010213, optical observations
  4. GRB010126: CONCAM crude optical limits during GRB
  5. HETE positions added to GCN
  6. CONCAM null result on GRB001005
  7. CONCAM crude optical limits before and after GRB000926
  8. GRB000607, optical observations
  9. GRB 000615: NIR observations
  10. IPN triangulation of GRB000519
  11. RXTE/ASM and IPN localization of GRB 000508B
  12. BeppoSAX GRB000424
  13. BATSE observations of FXT/GRB 000416 = 1SAXJ1715.0-7134
  14. GRB000408, lotis optical observations
  15. GRB 000313 - optical transient in the BATSE error box
  16. GRB 000214 ``Valentine's Day Burst'': BeppoSAX NFI Observation
  17. BATSE GRB trigger criterion changed
  18. GRB000210 X-ray afterglow
  19. GRB 000210: BATSE Observations
  20. GRB000201 Optical Observations
  21. GRB 000201: TAROT optical observations
  22. BATSE GRB trigger criteria changed
  23. BATSE+IPN location of GRB000131
  24. BATSE location of GRB000126
  25. BATSE Observations of GRB000115
  26. Second RXTE Observation of GRB 000115
  27. Single IPN error box for GRB991229
  28. GRB 991216: Updated BATSE parameters
  29. GRB 991216--Summary of RXTE Observations
  30. GRB 991216: Extremely bright BATSE burst
  31. GRB991106: BeppoSAX/BATSE results
  32. BeppoSAX NFI Observation of GRB991106
  33. GRB 991105: BATSE Observations
  34. GRB991106, optical observation at SAO-RAS
  35. GRB 991106, LOTIS Optical Observations
  36. GRB991105: SAX-GRBM/-WFC detection
  37. BeppoSAX MAIL n. 99/30: GRB991105 refined position (fwd)
  38. GRB ALERT: GRB991105
  39. GRB 991014 - BeppoSAX NFI observations
  40. GRB991014 BATSE Observations
  41. Super-LOTIS optical observation of GRB991014
  42. BeppoSAX ALERT: GRB991014
  43. GRB 990915 optical observations
  44. BATSE GRB trigger criteria
  45. IPN error box for GRB990915 (=BATSE 7766)
  46. IPN localization of BATSE #7766 (GRB990915)
  47. GRB990806: BATSE Observations
  48. BeppoSAX ALERT GRB990806: Summer GRB
  49. BeppoSAX NFI Observation of GRB990705
  50. BeppoSAX NFI Observation of GRB990705
  51. GRB990704
  52. BeppoSAX NFI Observation of GRB990627 X-ray afterglow
  53. BeppoSAX: GRB990625
  54. X-ray/GRB 1SAX J0835.9+5118, BATSE Observation
  55. optical observation of the X-ray/GRB transient SAX J0835.9+5118
  56. BeppoSAX: A new fast X-ray transient
  57. GRB990510: X-ray afterglow
  58. GRB 990510: BATSE Observations
  59. GRB 990506: BATSE Observations
  60. GRB990323 PRECISE IPN POSITION
  61. GRB990316: simultaneous optical observation
  62. GRB990316 - Optical null results
  63. ASM/IPN error box for GRB 990308 (BATSE #7457)
  64. GRB 990308a and GRB 990308b
  65. BATSE Resumes Normal Operations
  66. Search for Potential Images of GRB 990123
  67. Search for Potential Images of GRB 990123
  68. GRB990123, OSSE observations
  69. GRB 990123: Strong MeV CGRO-COMPTEL detection now posted on WWW
  70. GRB 990123: BATSE Observations
  71. GRB990123, early optical counterpart detection
  72. GRB990123, BeppoSAX WFC detection and NFI planned follow-up
  73. Possible identification of SN1999E with GRB980910
  74. GRB 980923 BATSE Observations
  75. GRB980703 - BeppoSAX/GRBM detection
  76. GRB 980703: BATSE Observations
  77. RXTE Observation of GRB 980706
  78. GRB980703: LOTIS observation at early times
  79. GRB 980703: ASM Position & Intensity
  80. GRB 980613: BATSE Observations
  81. SGR1627-41, BeppoSAX-GRBM detections
  82. Discovery of a new SGR source, SGR1627-41
  83. BATSE on-board GRB trigger change
  84. GRB980519 BATSE Observations
  85. BATSE on-board GRB trigger change
  86. GRB980519, BeppoSAX-WFC updated position
  87. GRB980519, BeppoSAX-WFC position
  88. GRB980425 BATSE observations
  89. GRB 971024: Refined analysis by USNOFS Observations
  90. GRB 971024: USNO Observations
  91. GRB 970925: BATSE Localization

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