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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"

29094 results found.

  1. GRB060210:Faulkes Telescope North Afterglow Confirmation
  2. GRB 060210: candidate afterglow
  3. GRB 060210: Swift detection of a burst
  4. GRB060210: Optical afterglow
  5. GRB 060206: Swift/UVOT Observations
  6. Swift-BAT trigger 180931 is not a GRB
  7. GRB060209: RTT150 optical observations
  8. GRB 060209 : TAROT optical observation
  9. GRB 060209(?): Swift-BAT detection of a possible burst
  10. GRB 060203: Swift/UVOT upper limits
  11. GRB 060121 : WIDGET Pre-trigger limit
  12. GRB 060206: IR Detection of the Afterglow
  13. GRB060204A: Swift/UVOT observations
  14. GRB 060206: Swift-BAT refined analysis
  15. GRB060206: Swift XRT Refined Analysis
  16. GRB060206: Liverpool Telescope observation
  17. GRB060206: P60 Optical Observations
  18. GRB060206: SARA Detection
  19. GRB 060206: RAPTOR observations of afterglow candidate variability.
  20. GRB060204a: Swift XRT Detection of an Afterglow Candidate
  21. GRB060206: Swift-BAT detection of a burst
  22. GRB 060204C: XRT analysis of Swift J061223.0+701243.9
  23. BAT GRB 060204C is probably not a GRB
  24. GRB 060204B: BVRi-band detections of optical afterglow
  25. GRB060204B: Swift/UVOT refined analysis
  26. Swift XRT Observation of GRB 060204C
  27. GRB 060204B: Swift-BAT refined analysis
  28. GRB 060204B: ART early limit
  29. GRB 060204C: Liverpool Telescopes optical limit
  30. GRB 060204C: ROTSE-III Optical Limits
  31. GRB 060204C: Swift-BAT detection of a burst
  32. GRB060204B: Faulkes OT candidate
  33. GRB060204B, optical observation
  34. GRB060204B - SDSS pre-burst observations
  35. GRB 060203: Swift-BAT refined analysis
  36. GRB 060204B: Swift detection of a burst
  37. GRB 060203: RTT150 optical observations
  38. GRB060203: Swift XRT Team Refined Analysis
  39. GRB060203 - Swift UVOT observation
  40. Swift-BAT trigger is GRB 060203
  41. Possible GRB 060203: candidate optical counterpart
  42. Swift BAT Trigger 180151: Swift XRT source detection
  43. Possible GRB 060203: optical observations at Asiago
  44. Swift-BAT trigger 180151 is unknown origin at this time
  45. GRB 060202: GETS observation
  46. GRB 060202: Refined analysis of the Swift-BAT burst
  47. GRB060202, optical observation
  48. GRB 060202: Swift/UVOT upper limits
  49. GRB 060202: Swift XRT Team Refined Analysis
  50. GRB060202: Faulkes North observation
  51. GRB 060202: Swift detection of a burst
  52. GRB060130: Optical imaging
  53. GRB 060124: HETE detection and spectrum of the main peak
  54. Konus-Wind observation of GRB 060124
  55. GRB060124: detailed XRT analysis
  56. GRB 060124 Optical Observations
  57. GRB 060124: ART optical limits during the burst
  58. GRB 060124: R band Observations
  59. GRB 060124: Extremely long burst, Swift-BAT refined analysis
  60. GRB 060123: Swift detection of a very long, faint burst
  61. GRB 060121: OHP optical limits
  62. GRB 060124: TAROT optical limits
  63. GRB 060124: Swift/UVOT Observation
  64. GRB 060124: XRT position
  65. GRB 060117: Suzaku WAM observation of the prompt emission
  66. GRB 060111B: Suzaku WAM observation of the prompt emission
  67. GRB 060124: Swift-BAT detection of a burst
  68. GRB 060116: MARGE optical observations
  69. GRB 060121: Swift XRT refined analysis
  70. GRB 060121: Swift XRT refined position
  71. Konus-Wind observation of GRB 060117
  72. GRB 060117: Refined analysis of the Swift-BAT burst
  73. GRB 060117: FRAM optical afterglow candidate
  74. GRB 060117: Swift-BAT detection of a bright burst
  75. GRB 060116: Refined analysis of the Swift-BAT burst
  76. GRB 060116: Swift/UVOT upper limits
  77. GRB 060110: XRT position and analysis
  78. GRB 060116: ROTSE-III Optical Limits
  79. GRB060116: XRT position
  80. GRB060116: Faulkes North observation
  81. GRB 060116: Swift-BAT detection of a burst
  82. GRB 060115: Refined analysis of the Swift-BAT burst
  83. GRB 060115: Swift/UVOT upper limits
  84. GRB 060115: Swift XRT refined analysis
  85. GRB 060114: Swift/UVOT Observations
  86. GRB 060115: Swift detection of a burst
  87. GRB 060114: Swift XRT upper limit
  88. GRB060114: Faulkes North observation
  89. GRB 060110: KAIT observations
  90. GRB 060111B: Swift XRT refined analysis
  91. GRB 060111B: TAROT optical observation
  92. GRB060111A: RTT150 optical observations
  93. GRB060111B: RTT150, possible host galaxy
  94. GRB 060111B: Refined analysis of the Swift-BAT burst
  95. GRB 060110: MARGE observations
  96. GRB 060111(a): P60 Observations
  97. GRB 060111B: ROTSE-III Detection of Optical Counterpart Flare
  98. GRB 060111B: Swift detection of a burst
  99. GRB 060111: Swift-BAT Refined Analysis
  100. GRB 060111: TAROT optical observation

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