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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"

32580 results found.

  1. GRB 081211B - possibly a short burst with extended emission
  2. GRB 081118: Zadko observations
  3. Fermi Trig Num 251059717 = SGR 0044+42: MASTER prompt optical observations
  4. GRB 081215A: Gamma Repeater?
  5. Possible GRB 081211B: Swift/UVOT Upper Limits
  6. GRB 081210: optical observations
  7. Possible GRB 081211B - Swift-XRT analysis
  8. GRB 081209: Fermi GBM detection
  9. GRB 081007: Detection of a Supernova
  10. GRB 081210: Xinglong TNT R band Upper Limits
  11. GRB 081210, SMARTS optical/IR observations
  12. GRB 081211: Swift-BAT refined analysis
  13. GRB 081211: Swift XRT refined analysis
  14. GRB 081211: Swift/UVOT detection of an optical afterglow
  15. GRB 081210: Swift/UVOT refined analysis
  16. GRB 081210: Swift-XRT refined analysis
  17. GRB081203B: optical observations
  18. GRB 081210: Swift-BAT refined analysis
  19. Konus-Wind observation of GRB 081209
  20. GRB 081203A: optical observations
  21. Radio observation of GRB 081121 with ATCA
  22. Radio observation of GRB 081118 with ATCA
  23. GRB 081128: afterglow observations
  24. GRB 081203B: Suzaku WAM observation of the prompt emission
  25. GRB 081203B: Additional Gemini imaging
  26. Radio observation of GRB 081109 with ATCA
  27. Radio observation of GRB 081104 with ATCA
  28. Radio observation of GRB 081029 with ATCA
  29. Radio observation of GRB 081008 with ATCA
  30. GRB081203A: Ashra-1 observation of early optical and VHE-neutrino emission
  31. GRB 081203B: Gemini observations
  32. GRB 081128: optical observation in CrAO
  33. GRB081203A: Optical observations at Ishigaki
  34. GRB 081128: Optical afterglow observations
  35. GRB 081204: GROND Observations
  36. GRB081203B: optical observations
  37. Radio detection of GRB 081203B with the VLA
  38. GRB 081204: Magellan observations
  39. GRB081203A: Radio upper limit at 15 GHz
  40. GRB 081204: Swift/UVOT Upper Limits
  41. GRB 081204: Swift XRT afterglow confirmation
  42. GRB081203A: MITSuME optical observation
  43. GRB 081203A: Optical observations of Xinglong TNT telescope
  44. GRB 081203A: Skynet/GORT Detections
  45. GRB 081204: Swift XRT afterglow candidate
  46. GRB081203A: optical observation
  47. GRB 081204 : a long GRB localized by INTEGRAL
  48. VLA Radio upper limit on GRB 081203A
  49. Swift-XRT observations of GRB 081203B
  50. Konus-Wind observation of GRB 081203A
  51. Konus-Wind observation of GRB 081203B
  52. GRB081203A: Swift-XRT refined analysis
  53. GRB 081203B: optical observations
  54. Swift/UVOT detection of GRB081203B
  55. GRB 081203B: Swift-XRT candidate afterglow.
  56. GRB 081203A: optical observations
  57. Swift UVOT observations of GRB 081203A
  58. GRB 081203B: Naming correction for burst detected in Swift-BAT slew data
  59. GRB081203A: Swift/UVOT grism redshift
  60. GRB 081203A: Burst detection from Swift-BAT slew data
  61. GRB 081203A: Swift-BAT refined analysis
  62. GRB 081130B: MASTER prompt optical observations
  63. GRB081203: optical observation
  64. GRB 081128: optical observation
  65. Swift Trigger 335971: Swift/UVOT Observations
  66. GRB 081126: afterglow photometry
  67. GRB 081126: Fermi GBM detection
  68. VLA Radio upper limit on GRB 081126
  69. GRB 081128A: optical observations
  70. GRB081128: Swift/UVOT Upper Limits
  71. SGR 1806-20: Fermi GBM detection.
  72. GRB 081128: Swift-XRT refined analysis
  73. GRB 081128: Liverpool Telescope afterglow confirmation
  74. GRB081128: optical observations
  75. GRB081128 : Lulin optical follow-ups
  76. GRB 081128: Swift-BAT refined analysis
  77. GRB 081128: Optical observation of xinglong TNT
  78. GRB081126: Afterglow photometry from Crni Vrh
  79. GRB 081127: Swift/UVOT Upper Limits
  80. GRB 081127: Swift-XRT refined analysis
  81. GRB 081126: Confirmation of the Optical Afterglow
  82. GRB 081127: Swift-BAT refined analysis
  83. Konus-Wind observation of GRB 081126
  84. GRB 081126: Swift-XRT refined analysis
  85. GRB 081126: Swift/UVOT Observations
  86. GRB 081126: optical observations
  87. GRB 081126: Swift-BAT refined analysis
  88. Konus-Wind observation of GRB 081121
  89. GRB 081121, SMARTS optical/IR afterglow observations
  90. GRB081121: Fermi GBM detection
  91. GRB081121: Refined Swift/UVOT observations
  92. GRB 081121: Swift-XRT refined analysis
  93. GRB 081121: GROND observations
  94. GRB 081121: Swift-BAT refined analysis
  95. GRB081121: Swift/UVOT observations
  96. GRB 081121: ROTSE-III Detection of Optical Counterpart
  97. GRB081118 : optical upper limit
  98. GRB 081016b, SMARTS optical/IR observations
  99. VLA Radio upper limit on GRB 081118
  100. GRB 081118: VLT redshift

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