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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"

32568 results found.

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

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