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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"

32766 results found.

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

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