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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"

32760 results found.

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

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