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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"

32689 results found.

  1. GRB081203A: BTA observation
  2. Konus-Wind observation of GRB 081221
  3. GRB 081222: GROND Detection of the Optical/NIR Afterglow
  4. GRB 081221: further NOT observations
  5. GRB 081221: NOT observations
  6. GRB 081211B: Further Swift-XRT analysis
  7. GRB 081216: Suzaku WAM observation of the prompt emission
  8. GRB 081216 : Fermi GBM observation
  9. GRB 081215A: Fermi GBM detection
  10. GRB 081211B - possibly a short burst with extended emission
  11. GRB 081118: Zadko observations
  12. Fermi Trig Num 251059717 = SGR 0044+42: MASTER prompt optical observations
  13. GRB 081215A: Gamma Repeater?
  14. Possible GRB 081211B: Swift/UVOT Upper Limits
  15. GRB 081210: optical observations
  16. Possible GRB 081211B - Swift-XRT analysis
  17. GRB 081209: Fermi GBM detection
  18. GRB 081007: Detection of a Supernova
  19. GRB 081210: Xinglong TNT R band Upper Limits
  20. GRB 081210, SMARTS optical/IR observations
  21. GRB 081211: Swift-BAT refined analysis
  22. GRB 081211: Swift XRT refined analysis
  23. GRB 081211: Swift/UVOT detection of an optical afterglow
  24. GRB 081210: Swift/UVOT refined analysis
  25. GRB 081210: Swift-XRT refined analysis
  26. GRB081203B: optical observations
  27. GRB 081210: Swift-BAT refined analysis
  28. Konus-Wind observation of GRB 081209
  29. GRB 081203A: optical observations
  30. Radio observation of GRB 081121 with ATCA
  31. Radio observation of GRB 081118 with ATCA
  32. GRB 081128: afterglow observations
  33. GRB 081203B: Suzaku WAM observation of the prompt emission
  34. GRB 081203B: Additional Gemini imaging
  35. Radio observation of GRB 081109 with ATCA
  36. Radio observation of GRB 081104 with ATCA
  37. Radio observation of GRB 081029 with ATCA
  38. Radio observation of GRB 081008 with ATCA
  39. GRB081203A: Ashra-1 observation of early optical and VHE-neutrino emission
  40. GRB 081203B: Gemini observations
  41. GRB 081128: optical observation in CrAO
  42. GRB081203A: Optical observations at Ishigaki
  43. GRB 081128: Optical afterglow observations
  44. GRB 081204: GROND Observations
  45. GRB081203B: optical observations
  46. Radio detection of GRB 081203B with the VLA
  47. GRB 081204: Magellan observations
  48. GRB081203A: Radio upper limit at 15 GHz
  49. GRB 081204: Swift/UVOT Upper Limits
  50. GRB 081204: Swift XRT afterglow confirmation
  51. GRB081203A: MITSuME optical observation
  52. GRB 081203A: Optical observations of Xinglong TNT telescope
  53. GRB 081203A: Skynet/GORT Detections
  54. GRB 081204: Swift XRT afterglow candidate
  55. GRB081203A: optical observation
  56. GRB 081204 : a long GRB localized by INTEGRAL
  57. VLA Radio upper limit on GRB 081203A
  58. Swift-XRT observations of GRB 081203B
  59. Konus-Wind observation of GRB 081203A
  60. Konus-Wind observation of GRB 081203B
  61. GRB081203A: Swift-XRT refined analysis
  62. GRB 081203B: optical observations
  63. Swift/UVOT detection of GRB081203B
  64. GRB 081203B: Swift-XRT candidate afterglow.
  65. GRB 081203A: optical observations
  66. Swift UVOT observations of GRB 081203A
  67. GRB 081203B: Naming correction for burst detected in Swift-BAT slew data
  68. GRB081203A: Swift/UVOT grism redshift
  69. GRB 081203A: Burst detection from Swift-BAT slew data
  70. GRB 081203A: Swift-BAT refined analysis
  71. GRB 081130B: MASTER prompt optical observations
  72. GRB081203: optical observation
  73. GRB 081128: optical observation
  74. Swift Trigger 335971: Swift/UVOT Observations
  75. GRB 081126: afterglow photometry
  76. GRB 081126: Fermi GBM detection
  77. VLA Radio upper limit on GRB 081126
  78. GRB 081128A: optical observations
  79. GRB081128: Swift/UVOT Upper Limits
  80. SGR 1806-20: Fermi GBM detection.
  81. GRB 081128: Swift-XRT refined analysis
  82. GRB 081128: Liverpool Telescope afterglow confirmation
  83. GRB081128: optical observations
  84. GRB081128 : Lulin optical follow-ups
  85. GRB 081128: Swift-BAT refined analysis
  86. GRB 081128: Optical observation of xinglong TNT
  87. GRB081126: Afterglow photometry from Crni Vrh
  88. GRB 081127: Swift/UVOT Upper Limits
  89. GRB 081127: Swift-XRT refined analysis
  90. GRB 081126: Confirmation of the Optical Afterglow
  91. GRB 081127: Swift-BAT refined analysis
  92. Konus-Wind observation of GRB 081126
  93. GRB 081126: Swift-XRT refined analysis
  94. GRB 081126: Swift/UVOT Observations
  95. GRB 081126: optical observations
  96. GRB 081126: Swift-BAT refined analysis
  97. Konus-Wind observation of GRB 081121
  98. GRB 081121, SMARTS optical/IR afterglow observations
  99. GRB081121: Fermi GBM detection
  100. GRB081121: Refined Swift/UVOT observations

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