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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"

32767 results found.

  1. GRB 081211: Swift/UVOT detection of an optical afterglow
  2. GRB 081210: Swift/UVOT refined analysis
  3. GRB 081210: Swift-XRT refined analysis
  4. GRB081203B: optical observations
  5. GRB 081210: Swift-BAT refined analysis
  6. Konus-Wind observation of GRB 081209
  7. GRB 081203A: optical observations
  8. Radio observation of GRB 081121 with ATCA
  9. Radio observation of GRB 081118 with ATCA
  10. GRB 081128: afterglow observations
  11. GRB 081203B: Suzaku WAM observation of the prompt emission
  12. GRB 081203B: Additional Gemini imaging
  13. Radio observation of GRB 081109 with ATCA
  14. Radio observation of GRB 081104 with ATCA
  15. Radio observation of GRB 081029 with ATCA
  16. Radio observation of GRB 081008 with ATCA
  17. GRB081203A: Ashra-1 observation of early optical and VHE-neutrino emission
  18. GRB 081203B: Gemini observations
  19. GRB 081128: optical observation in CrAO
  20. GRB081203A: Optical observations at Ishigaki
  21. GRB 081128: Optical afterglow observations
  22. GRB 081204: GROND Observations
  23. GRB081203B: optical observations
  24. Radio detection of GRB 081203B with the VLA
  25. GRB 081204: Magellan observations
  26. GRB081203A: Radio upper limit at 15 GHz
  27. GRB 081204: Swift/UVOT Upper Limits
  28. GRB 081204: Swift XRT afterglow confirmation
  29. GRB081203A: MITSuME optical observation
  30. GRB 081203A: Optical observations of Xinglong TNT telescope
  31. GRB 081203A: Skynet/GORT Detections
  32. GRB 081204: Swift XRT afterglow candidate
  33. GRB081203A: optical observation
  34. GRB 081204 : a long GRB localized by INTEGRAL
  35. VLA Radio upper limit on GRB 081203A
  36. Swift-XRT observations of GRB 081203B
  37. Konus-Wind observation of GRB 081203A
  38. Konus-Wind observation of GRB 081203B
  39. GRB081203A: Swift-XRT refined analysis
  40. GRB 081203B: optical observations
  41. Swift/UVOT detection of GRB081203B
  42. GRB 081203B: Swift-XRT candidate afterglow.
  43. GRB 081203A: optical observations
  44. Swift UVOT observations of GRB 081203A
  45. GRB 081203B: Naming correction for burst detected in Swift-BAT slew data
  46. GRB081203A: Swift/UVOT grism redshift
  47. GRB 081203A: Burst detection from Swift-BAT slew data
  48. GRB 081203A: Swift-BAT refined analysis
  49. GRB 081130B: MASTER prompt optical observations
  50. GRB081203: optical observation
  51. GRB 081128: optical observation
  52. Swift Trigger 335971: Swift/UVOT Observations
  53. GRB 081126: afterglow photometry
  54. GRB 081126: Fermi GBM detection
  55. VLA Radio upper limit on GRB 081126
  56. GRB 081128A: optical observations
  57. GRB081128: Swift/UVOT Upper Limits
  58. SGR 1806-20: Fermi GBM detection.
  59. GRB 081128: Swift-XRT refined analysis
  60. GRB 081128: Liverpool Telescope afterglow confirmation
  61. GRB081128: optical observations
  62. GRB081128 : Lulin optical follow-ups
  63. GRB 081128: Swift-BAT refined analysis
  64. GRB 081128: Optical observation of xinglong TNT
  65. GRB081126: Afterglow photometry from Crni Vrh
  66. GRB 081127: Swift/UVOT Upper Limits
  67. GRB 081127: Swift-XRT refined analysis
  68. GRB 081126: Confirmation of the Optical Afterglow
  69. GRB 081127: Swift-BAT refined analysis
  70. Konus-Wind observation of GRB 081126
  71. GRB 081126: Swift-XRT refined analysis
  72. GRB 081126: Swift/UVOT Observations
  73. GRB 081126: optical observations
  74. GRB 081126: Swift-BAT refined analysis
  75. Konus-Wind observation of GRB 081121
  76. GRB 081121, SMARTS optical/IR afterglow observations
  77. GRB081121: Fermi GBM detection
  78. GRB081121: Refined Swift/UVOT observations
  79. GRB 081121: Swift-XRT refined analysis
  80. GRB 081121: GROND observations
  81. GRB 081121: Swift-BAT refined analysis
  82. GRB081121: Swift/UVOT observations
  83. GRB 081121: ROTSE-III Detection of Optical Counterpart
  84. GRB081118 : optical upper limit
  85. GRB 081016b, SMARTS optical/IR observations
  86. VLA Radio upper limit on GRB 081118
  87. GRB 081118: VLT redshift
  88. GRB 081118: Swift-XRT refined analysis
  89. GRB 081118: GROND detection of afterglow
  90. GRB 081118: optical afterglow candidate
  91. GRB 081118: Swift UVOT Upper Limits
  92. GRB 081118: Swift-BAT refined analysis
  93. GRB 081109A: confirmation of possible detection host galaxy
  94. Further Swift-XRT observations of the probable GRB 081105.
  95. GRB 081102: MASTER refind and final results
  96. GRB 081109: GROND redshift limit and host extinction
  97. GRB 081025: Swift-XRT further analysis
  98. GRB 081024B: Swift-XRT late-time observations
  99. Swift-BAT refined analysis of trigger 334129
  100. GRB 081109B: Swift/UVOT refined analysis

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