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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"

20516 results found.

  1. GRB 060210: ARC NIR Detection of Afterglow and Possible Host Galaxy
  2. GRB 060211b: P60 Observations
  3. GRB 060211B: Swift/BAT refined analysis
  4. GRB060210: Swift/UVOT Upper Limits
  5. GRB 060210: Optical Observations
  6. GRB 060211: Swift detection of a long burst
  7. GRB 060210: Swift detection of a burst
  8. GRB060210: Optical afterglow
  9. GRB 060209 : TAROT optical observation
  10. GRB 060203: Swift/UVOT upper limits
  11. GRB 060121 : WIDGET Pre-trigger limit
  12. GRB060204a: Swift XRT Source is not GRB Afterglow
  13. GRB 060204b: pseudo-z from spectral parameters of the prompt emission
  14. GRB 060206: Subaru/FOCAS optical spectroscopy
  15. GRB 060206: IR Detection of the Afterglow
  16. GRB060204A: Swift/UVOT observations
  17. GRB 060206: Swift-BAT refined analysis
  18. GRB060206: SDSS Pre-Burst Observations
  19. GRB060206: Swift XRT Refined Analysis
  20. GRB060206: Swift XRT Position
  21. GRB060206 - Swift UVOT Confirmation of Optical Afterglow
  22. GRB 060204C: XRT analysis of Swift J061223.0+701243.9
  23. GRB060204C: optical observation
  24. GRB 060204B: BVRi-band detections of optical afterglow
  25. GRB 060204A: Swift XRT upper limit
  26. GRB 060204A: FRAM optical observations
  27. GRB060204B: Swift/UVOT refined analysis
  28. GRB 060204C: optical observations
  29. Swift XRT Observation of GRB 060204C
  30. GRB 060204B: ART early limit
  31. GRB060204B: Swift XRT Team Refined Analysis
  32. GRB 060204b: Keck/LRIS Afterglow Confirmation
  33. GRB 060204C: Liverpool Telescopes optical limit
  34. GRB 060204C: Swift-BAT detection of a burst
  35. GRB060204B, optical observation
  36. GRB060204B - SDSS pre-burst observations
  37. GRB 060204B: Swift detection of a burst
  38. GRB 060204: a long GRB detected by INTEGRAL
  39. GRB 060202: UKIRT/WFCAM K-band and KeckI/LRIS I-band Observation
  40. GRB 060203: RTT150 optical observations
  41. GRB060203: Swift XRT Team Refined Analysis
  42. GRB 060203: IR Counterpart
  43. Swift BAT Trigger 180151: Swift XRT source detection
  44. Possible GRB 060203: optical observations at Asiago
  45. GRB 060202: PROMPT Observations
  46. GRB 060202: Gemini-N J, H, K_s observations
  47. GRB 060202: Near-IR Observation with UKIRT/WFCAM
  48. GRB 060202: Optical Afterglow Candidate from Keck/LRIS
  49. GRB060202, optical observation
  50. GRB 060202: Swift/UVOT upper limits
  51. GRB 060202: Swift XRT Team Refined Analysis
  52. GRB 060121: Gemini Late-time Observations
  53. GRB 060130: PROMPT Observations
  54. GRB060130: Further R-band imaging
  55. GRB 060130: Swift/XRT observation
  56. GRB 060123: VLA Radio Observations
  57. GRB060130: Optical imaging
  58. GRB060130: REM infrared observations
  59. GRB 060130, SMARTS optical observations
  60. GRB 060130: FRAM optical observations
  61. GRB 060121: Confirmation of NIR Afterglow
  62. GRB060124, BVRcIc field calibration
  63. GRB 060121: Probable Detection of NIR Afterglow
  64. GRB 060116 HST observations
  65. Refined XRT Position for GRB 060123
  66. GRB 060124: ART optical limits during the burst
  67. GRB060123: Optical and IR Imaging
  68. GRB 060123: P200 Observations
  69. GRB 060124: R band Observations
  70. GRB 060124 : Optical observation at Xinglong and Kiso
  71. GRB060123: SDSS pre-burst observations
  72. GRB 060121: OHP optical limits
  73. GRB 060124: TAROT optical limits
  74. GRB060124, optical observation
  75. GRB 060124: Optical Observations at Tautenburg
  76. GRB 060124: Swift-BAT detection of a burst
  77. GRB 060121: Liverpool Telescopes optical limits
  78. GRB 060121: candidate optical counterpart
  79. GRB 060121: Infrared Observations
  80. GRB 060121: optical observations
  81. GRB 060121: Optical imaging
  82. GRB060121 - SDSS pre-burst observations
  83. HETE Alert 4006: MASTER promt optical limit
  84. GRB060117 - ATCA 3/6cm radio limits - correction
  85. GRB060117 - ATCA 3/6cm radio limits
  86. GRB 060116: UKIRT IR Observations
  87. GRB 060117: FRAM optical afterglow candidate
  88. GRB 060117: nearby galaxy
  89. GRB 060116: VLT optical observations
  90. GRB 060116: IR Candidate Afterglow
  91. GRB 060116: Swift/UVOT upper limits
  92. GRB060115: REM observations
  93. GRB060116: Faulkes North observation
  94. GRB 060116: Swift-BAT detection of a burst
  95. GRB 060115: Swift/UVOT upper limits
  96. GRB 060114: REM observations
  97. GRB 060114: Swift/UVOT Observations
  98. GRB060115, optical observation
  99. GRB 060115: MITSuME optical afterglow candidate
  100. GRB 060115: Swift detection of a burst

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