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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"

32571 results found.

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

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