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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"

21526 results found.

  1. GRB 060211A: Partial refined analysis on the Swift-BAT burst
  2. GRB 050826: Optical Afterglow and Host Galaxy
  3. GRB 060210: Further refined analysis of the Swift-BAT burst
  4. GRB 060211B: Swift/BAT refined analysis
  5. GRB060210: Swift/UVOT Upper Limits
  6. GRB 060211B: Swift-XRT Team refined analysis
  7. GRB060211b: optical observation
  8. GRB060211B: Swift/XRT position
  9. GRB 060210: Optical Observations
  10. GRB 060211A: Swift XRT Team Refined Analysis
  11. GRB 060211B: Swift-BAT detection of a burst
  12. GRB060211: Faulkes North observation
  13. GRB 060211: Swift detection of a long burst
  14. GRB 060210: Refined analysis of the Swift-BAT burst
  15. GRB060210: Swift XRT Refined Analysis
  16. GRB060210: Early Optical Observations
  17. GRB060210:Faulkes Telescope North Afterglow Confirmation
  18. GRB 060210: candidate afterglow
  19. GRB 060210: Swift detection of a burst
  20. GRB060210: Optical afterglow
  21. GRB 060206: Swift/UVOT Observations
  22. Swift-BAT trigger 180931 is not a GRB
  23. GRB060209: RTT150 optical observations
  24. GRB 060209 : TAROT optical observation
  25. GRB 060209(?): Swift-BAT detection of a possible burst
  26. GRB 060206: WSRT Radio Observations
  27. GRB 060203: Swift/UVOT upper limits
  28. GRB060204a: Swift XRT Source is not GRB Afterglow
  29. GRB 060204b: pseudo-z from spectral parameters of the prompt emission
  30. GRB 060204A: ROSAT Pointing
  31. GRB060204A: Swift/UVOT observations
  32. GRB 060206: Swift-BAT refined analysis
  33. GRB060206: Swift XRT Refined Analysis
  34. GRB060206: Swift XRT Position
  35. GRB060204a: Swift XRT Detection of an Afterglow Candidate
  36. GRB060206 - Swift UVOT Confirmation of Optical Afterglow
  37. GRB060206: Swift-BAT detection of a burst
  38. GRB 060204C: XRT analysis of Swift J061223.0+701243.9
  39. BAT GRB 060204C is probably not a GRB
  40. GRB 060204B: BVRi-band detections of optical afterglow
  41. GRB 060204A: Swift XRT upper limit
  42. GRB060204B: Swift/UVOT refined analysis
  43. GRB 060204C: optical observations
  44. Swift XRT Observation of GRB 060204C
  45. GRB 060204B: Swift-BAT refined analysis
  46. GRB060204B: Swift XRT Team Refined Analysis
  47. GRB 060204C: OSN limits
  48. GRB 060204C: Liverpool Telescopes optical limit
  49. GRB 060204C: ROTSE-III Optical Limits
  50. GRB 060204C: Swift-BAT detection of a burst
  51. GRB 060124: Radio Observations
  52. GRB060204B: Faulkes OT candidate
  53. GRB 060204B: ART optical limit
  54. GRB060204B, optical observation
  55. GRB060204B - SDSS pre-burst observations
  56. GRB 060203: Swift-BAT refined analysis
  57. GRB 060204B: Swift detection of a burst
  58. GRB 060203: RTT150 optical observations
  59. GRB060203: Swift XRT Team Refined Analysis
  60. GRB060203 - Swift UVOT observation
  61. Swift-BAT trigger is GRB 060203
  62. GRB 060203: IR Counterpart
  63. GRB060203: Observations with SARA
  64. GRB 060203: P60 Confirmation of Optical Afterglow
  65. Possible GRB 060203: candidate optical counterpart
  66. Swift BAT Trigger 180151: Swift XRT source detection
  67. Possible GRB 060203: optical observations at Asiago
  68. Swift-BAT trigger 180151 is unknown origin at this time
  69. GRB 060202: GETS observation
  70. GRB 060202: Gemini-N J, H, K_s observations
  71. GRB 060202: Near-IR Observation with UKIRT/WFCAM
  72. GRB 060202: Optical Afterglow Candidate from Keck/LRIS
  73. GRB 060202: Refined analysis of the Swift-BAT burst
  74. GRB060202, optical observation
  75. GRB 060202: Swift/UVOT upper limits
  76. GRB 060202: Swift XRT Team Refined Analysis
  77. GRB 060202 : Lulin R and I band limit
  78. GRB060202: Faulkes North observation
  79. GRB 060202: Swift detection of a burst
  80. GRB 060121: Gemini Late-time Observations
  81. GRB 060130: Swift/XRT observation
  82. GRB 060123: Gemini spectroscopy of the putative host galaxy
  83. GRB 060123: VLA Radio Observations
  84. Possible GRB 051221B: MDM Correction
  85. GRB 060123: Swift refined analysis of an unusual GRB
  86. GRB060124, BVRcIc field calibration
  87. GRB060105: refined analysis of the Suzaku observation
  88. GRB 060121: Probable Detection of NIR Afterglow
  89. GRB 060124: HETE detection and spectrum of the main peak
  90. Refined XRT Position for GRB 060123
  91. Konus-Wind observation of GRB 060124
  92. GRB060124: detailed XRT analysis
  93. GRB 060124 Optical Observations
  94. GRB060123: Optical and IR Imaging
  95. GRB 060123: P200 Observations
  96. GRB 060124: XRT refined analysis
  97. GRB 060124: R band Observations
  98. GRB 060124: Extremely long burst, Swift-BAT refined analysis
  99. GRB 060123: Swift detection of a very long, faint burst
  100. GRB 060124: TAROT optical limits

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