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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"

29074 results found.

  1. GRB060206: Swift-BAT detection of a burst
  2. GRB 060204C: XRT analysis of Swift J061223.0+701243.9
  3. BAT GRB 060204C is probably not a GRB
  4. GRB 060204B: BVRi-band detections of optical afterglow
  5. GRB060204B: Swift/UVOT refined analysis
  6. Swift XRT Observation of GRB 060204C
  7. GRB 060204B: Swift-BAT refined analysis
  8. GRB 060204B: ART early limit
  9. GRB 060204C: Liverpool Telescopes optical limit
  10. GRB 060204C: ROTSE-III Optical Limits
  11. GRB 060204C: Swift-BAT detection of a burst
  12. GRB060204B: Faulkes OT candidate
  13. GRB060204B, optical observation
  14. GRB060204B - SDSS pre-burst observations
  15. GRB 060203: Swift-BAT refined analysis
  16. GRB 060204B: Swift detection of a burst
  17. GRB 060203: RTT150 optical observations
  18. GRB060203: Swift XRT Team Refined Analysis
  19. GRB060203 - Swift UVOT observation
  20. Swift-BAT trigger is GRB 060203
  21. Possible GRB 060203: candidate optical counterpart
  22. Swift BAT Trigger 180151: Swift XRT source detection
  23. Possible GRB 060203: optical observations at Asiago
  24. Swift-BAT trigger 180151 is unknown origin at this time
  25. GRB 060202: GETS observation
  26. GRB 060202: Refined analysis of the Swift-BAT burst
  27. GRB060202, optical observation
  28. GRB 060202: Swift/UVOT upper limits
  29. GRB 060202: Swift XRT Team Refined Analysis
  30. GRB060202: Faulkes North observation
  31. GRB 060202: Swift detection of a burst
  32. GRB060130: Optical imaging
  33. GRB 060124: HETE detection and spectrum of the main peak
  34. Konus-Wind observation of GRB 060124
  35. GRB060124: detailed XRT analysis
  36. GRB 060124 Optical Observations
  37. GRB 060124: ART optical limits during the burst
  38. GRB 060124: R band Observations
  39. GRB 060124: Extremely long burst, Swift-BAT refined analysis
  40. GRB 060123: Swift detection of a very long, faint burst
  41. GRB 060121: OHP optical limits
  42. GRB 060124: TAROT optical limits
  43. GRB 060124: Swift/UVOT Observation
  44. GRB 060124: XRT position
  45. GRB 060117: Suzaku WAM observation of the prompt emission
  46. GRB 060111B: Suzaku WAM observation of the prompt emission
  47. GRB 060124: Swift-BAT detection of a burst
  48. GRB 060116: MARGE optical observations
  49. GRB 060121: Swift XRT refined analysis
  50. GRB 060121: Swift XRT refined position
  51. Konus-Wind observation of GRB 060117
  52. GRB 060117: Refined analysis of the Swift-BAT burst
  53. GRB 060117: FRAM optical afterglow candidate
  54. GRB 060117: Swift-BAT detection of a bright burst
  55. GRB 060116: Refined analysis of the Swift-BAT burst
  56. GRB 060116: Swift/UVOT upper limits
  57. GRB 060110: XRT position and analysis
  58. GRB 060116: ROTSE-III Optical Limits
  59. GRB060116: XRT position
  60. GRB060116: Faulkes North observation
  61. GRB 060116: Swift-BAT detection of a burst
  62. GRB 060115: Refined analysis of the Swift-BAT burst
  63. GRB 060115: Swift/UVOT upper limits
  64. GRB 060115: Swift XRT refined analysis
  65. GRB 060114: Swift/UVOT Observations
  66. GRB 060115: Swift detection of a burst
  67. GRB 060114: Swift XRT upper limit
  68. GRB060114: Faulkes North observation
  69. GRB 060110: KAIT observations
  70. GRB 060111B: Swift XRT refined analysis
  71. GRB 060111B: TAROT optical observation
  72. GRB060111A: RTT150 optical observations
  73. GRB060111B: RTT150, possible host galaxy
  74. GRB 060111B: Refined analysis of the Swift-BAT burst
  75. GRB 060110: MARGE observations
  76. GRB 060111(a): P60 Observations
  77. GRB 060111B: ROTSE-III Detection of Optical Counterpart Flare
  78. GRB 060111B: Swift detection of a burst
  79. GRB 060111: Swift-BAT Refined Analysis
  80. GRB 060111: TAROT optical observation
  81. GRB 060111: possible UVOT counterpart
  82. GRB060111 : XRT refined analysis
  83. GRB 060111: ROTSE-III Optical Limits
  84. GRB 060111: Swift detection of a burst
  85. GRB 060110: Swift-BAT refined analysis
  86. GRB 060109: Swift-BAT refined analysis
  87. GRB 060110a: RAPTOR detection of early optical emission.
  88. GRB 060110: ROTSE-III Confirmation of Optical Counterpart
  89. GRB 060110: Swift-BAT detection of a burst
  90. GRB 060109: Refined Swift-XRT analysis
  91. GRB 060109: Swift/UVOT upper limits
  92. GRB 060108: ISAS early observations and near IR upper limit
  93. GRB 060109: Swift Detection of a long burst
  94. GRB 060108: Refined XRT analysis
  95. GRB 060108: Swift/UVOT upper limits
  96. GRB060108: Faulkes Telescope observation
  97. GRB 060108: Refined analysis of the Swift-BAT burst
  98. GRB 060108: Swift XRT position
  99. GRB060108: Swift detection of its 100th GRB
  100. Konus-Wind observation of GRB 060105

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