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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"

27594 results found.

  1. IPN triangulation of GRB010613
  2. IPN triangulation of GRB010612
  3. GRB010518: a faint BeppoSAX detection
  4. GRB010324: BeppoSAX/GRBM data
  5. GRB 010214: X-Ray afterglow
  6. GRB010213, optical observations
  7. GRB010126: CONCAM crude optical limits during GRB
  8. HETE positions added to GCN
  9. CONCAM null result on GRB001005
  10. CONCAM crude optical limits before and after GRB000926
  11. GRB000607, optical observations
  12. GRB 000615: NIR observations
  13. IPN triangulation of GRB000519
  14. RXTE/ASM and IPN localization of GRB 000508B
  15. BeppoSAX GRB000424
  16. BATSE observations of FXT/GRB 000416 = 1SAXJ1715.0-7134
  17. GRB000408, lotis optical observations
  18. GRB 000313 - optical transient in the BATSE error box
  19. GRB 000214 ``Valentine's Day Burst'': BeppoSAX NFI Observation
  20. BATSE GRB trigger criterion changed
  21. GRB000210 X-ray afterglow
  22. GRB 000210: BATSE Observations
  23. GRB000201 Optical Observations
  24. GRB 000201: TAROT optical observations
  25. BATSE GRB trigger criteria changed
  26. BATSE+IPN location of GRB000131
  27. BATSE location of GRB000126
  28. BATSE Observations of GRB000115
  29. Second RXTE Observation of GRB 000115
  30. Single IPN error box for GRB991229
  31. GRB 991216: Updated BATSE parameters
  32. GRB 991216--Summary of RXTE Observations
  33. GRB 991216: Extremely bright BATSE burst
  34. GRB991106: BeppoSAX/BATSE results
  35. BeppoSAX NFI Observation of GRB991106
  36. GRB 991105: BATSE Observations
  37. GRB991106, optical observation at SAO-RAS
  38. GRB 991106, LOTIS Optical Observations
  39. GRB991105: SAX-GRBM/-WFC detection
  40. BeppoSAX MAIL n. 99/30: GRB991105 refined position (fwd)
  41. GRB ALERT: GRB991105
  42. GRB 991014 - BeppoSAX NFI observations
  43. GRB991014 BATSE Observations
  44. Super-LOTIS optical observation of GRB991014
  45. BeppoSAX ALERT: GRB991014
  46. GRB 990915 optical observations
  47. BATSE GRB trigger criteria
  48. IPN error box for GRB990915 (=BATSE 7766)
  49. IPN localization of BATSE #7766 (GRB990915)
  50. GRB990806: BATSE Observations
  51. BeppoSAX ALERT GRB990806: Summer GRB
  52. BeppoSAX NFI Observation of GRB990705
  53. BeppoSAX NFI Observation of GRB990705
  54. GRB990704
  55. BeppoSAX NFI Observation of GRB990627 X-ray afterglow
  56. BeppoSAX: GRB990625
  57. X-ray/GRB 1SAX J0835.9+5118, BATSE Observation
  58. optical observation of the X-ray/GRB transient SAX J0835.9+5118
  59. BeppoSAX: A new fast X-ray transient
  60. GRB990510: X-ray afterglow
  61. GRB 990510: BATSE Observations
  62. GRB 990506: BATSE Observations
  63. GRB990323 PRECISE IPN POSITION
  64. GRB990316: simultaneous optical observation
  65. GRB990316 - Optical null results
  66. ASM/IPN error box for GRB 990308 (BATSE #7457)
  67. GRB 990308a and GRB 990308b
  68. BATSE Resumes Normal Operations
  69. Search for Potential Images of GRB 990123
  70. Search for Potential Images of GRB 990123
  71. GRB990123, OSSE observations
  72. GRB 990123: Strong MeV CGRO-COMPTEL detection now posted on WWW
  73. GRB 990123: BATSE Observations
  74. GRB990123, early optical counterpart detection
  75. GRB990123, BeppoSAX WFC detection and NFI planned follow-up
  76. Possible identification of SN1999E with GRB980910
  77. GRB 980923 BATSE Observations
  78. GRB980703 - BeppoSAX/GRBM detection
  79. GRB 980703: BATSE Observations
  80. RXTE Observation of GRB 980706
  81. GRB980703: LOTIS observation at early times
  82. GRB 980703: ASM Position & Intensity
  83. GRB 980613: BATSE Observations
  84. SGR1627-41, BeppoSAX-GRBM detections
  85. Discovery of a new SGR source, SGR1627-41
  86. BATSE on-board GRB trigger change
  87. GRB980519 BATSE Observations
  88. BATSE on-board GRB trigger change
  89. GRB980519, BeppoSAX-WFC updated position
  90. GRB980519, BeppoSAX-WFC position
  91. GRB980425 BATSE observations
  92. GRB 971024: Refined analysis by USNOFS Observations
  93. GRB 971024: USNO Observations
  94. GRB 970925: BATSE Localization

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