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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"

28261 results found.

  1. GRB050502a: P60 Observations
  2. Renewal of SGR 1806-20 activity
  3. GRB050502B Swift-BAT refined analysis
  4. Swift UVOT refined analysis
  5. GRB 050502a : R band observation at Lulin observatory
  6. GRB 050502b : optical observation at Lulin observatory
  7. GRB 050502A: Redshift measurement based on Keck HIRES Observations
  8. Swift Detection of the Bright Burst GRB050502b
  9. GRB 050502: INTEGRAL results
  10. GRB 050502: ROTSE-III Detection of Possible Counterpart
  11. Swift/BAT possible detection of a weak burst GRB050430
  12. GRB050416a: Radio Detection
  13. GRB 050422: Swift-UVOT observation
  14. GRB 050422: Swift-BAT refined analysis
  15. Swift Detection of GRB 050422
  16. GRB 050421: SLOTIS observations
  17. GRB 050421: Further Analysis of IR imaging
  18. GRB050421: Radio Observations
  19. GRB050421: Radio Observations
  20. GRB 050421: IR Observations
  21. GRB 050421: Swift-BAT refined analysis
  22. GRB050421
  23. GRB 050421: early Swift XRT analysis results
  24. GRB 050421: NIR observations
  25. GRB050421: P60 Observations
  26. GRB 050421: BOOTES-2 simultaneous optical observations
  27. GRB 050416b: Tentative Swift XRT Position
  28. GRB 050315: potential host galaxy
  29. GRB050326: analysis of the XMM-Newton observation
  30. GRB050418: Null Optical Observations
  31. GRB050416A, optical observations
  32. GRB 050418: Swift-BAT refined analysis
  33. GRB 050416: Mitsume optical observation
  34. GRB050416B: IR observations
  35. GRB050412: Radio Observations
  36. GRB 050416: Swift/UVOT detection of afterglow emission
  37. GRB050416: Refined Swift-XRT analysis
  38. GRB 050416,optical observation
  39. GRB050416: P200 NIR Observations
  40. GRB 050416: Radio observations
  41. Swift BAT/XRT Detection of GRB 050416
  42. GRB 050412: PROMPT VRcIc Observations
  43. GRB 050408: Kuiper 1.5m observations
  44. GRB 050412: early Swift XRT analysis results
  45. GRB 050412: Early Optical/Ultraviolet Observations with
  46. GRB 050408: SDSS Field Calibration
  47. GRB050412: P60 Observations
  48. GRB 050412: Swift XRT Position
  49. Swift-BAT Detection of GRB 050412: A Bright, Long Burst
  50. GRB 050412: IR and Optical observations
  51. GRB 050412: IR Observations
  52. GRB050408: Radio Observations
  53. GRB 050401: Optical limit
  54. GRB050410: P60 Observations
  55. GRB 050410: Early Optical/Ultraviolet Observations with Swift/UVOT
  56. GRB 050408: Early Optical/Ultraviolet Observations with Swift/UVOT
  57. GRB050410: Radio Observations
  58. GRB050410: MASTER optical observations
  59. GRB 050410: Early observations with Swift-UVOT
  60. Swift-BAT detection of GRB 050410
  61. GRB 050408: Inconsistency of host galaxy identification
  62. GRB 050408: Subaru Observations
  63. GRB 050408: WIDGET simultaneous optical observations
  64. GRB 050408: Properties of the Host Galaxy
  65. GRB050408: Radio Observations
  66. GRB 050408: Swift XRT analysis
  67. GRB 050408: Optical limit at 20 min after the burst
  68. GRB050408: REM NIR and Optical observation
  69. GRB 050408,optical observation
  70. GRB 050408: Mercator Optical Observations
  71. GRB 050408: Optical afterglow confirmed
  72. GRB 050408: opitcal observation
  73. GRB 050408, optical observations
  74. GRB 050408 optical candidate
  75. GRB 050408: Swift XRT Position
  76. GRB050408: MASTER optical observations
  77. GRB050401: Radio Detection
  78. GRB 050406: early Swift XRT analysis results
  79. GRB 050406 BAT refined analysis
  80. GRB 050406: Early observations with Swift-UVOT
  81. Swift-BAT detection of GRB 050406
  82. GRB050401, radio observation at 4.8 GHz and 8.64 GHz
  83. GRB 050401: VLT spectroscopic redshift
  84. GRB 050401 BAT refined analysis
  85. GRB050401: TNG R-band observation
  86. GRB 050402: Early observations with Swift-UVOT
  87. Swift Trigger 113225: P60 Observations
  88. GRB 050401: Optical afterglow confirmed
  89. GRB 050401: Prompt XRT position
  90. Retraction of three Swift GRB triggers
  91. GRB050331: No Afterglow Detected
  92. Swift-BAT detection of GRB 050331b
  93. GRB 050331: Swift UVOT Source
  94. Swift-BAT detection of GRB 050331
  95. GRB 050326: Early observations with Swift-UVOT
  96. GRB 050326 XMM-Newton observation
  97. GRB 050326: Swift XRT Position
  98. GRB 050326 BAT refined analysis
  99. GRB050326: delayed XRT observation
  100. GRB050319, color indices

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