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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"

32764 results found.

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

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