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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"

21823 results found.

  1. GRB 081210, SMARTS optical/IR observations
  2. GRB 081211: Enhanced Swift-XRT position
  3. GRB 081211: Swift detection of a burst
  4. GRB081203B: optical observations
  5. GRB 081210: Enhanced Swift-XRT position
  6. GRB 081210: Swift detection of a burst with optical afterglow
  7. Konus-Wind observation of GRB 081209
  8. IPN triangulation of short hard GRB 081209
  9. GRB 081203A: optical observations
  10. GRB 081128: afterglow observations
  11. GRB 081203B: Suzaku WAM observation of the prompt emission
  12. GRB081203A: Ashra-1 observation of early optical and VHE-neutrino emission
  13. GRB081203A: Optical observations at Ishigaki
  14. GRB 081128: Optical afterglow observations
  15. GRB 081204: GROND Observations
  16. Radio detection of GRB 081203B with the VLA
  17. GRB081203A: Radio upper limit at 15 GHz
  18. GRB 081204: Swift/UVOT Upper Limits
  19. GRB081203A: MITSuME optical observation
  20. GRB081203A: optical observation
  21. VLA Radio upper limit on GRB 081203A
  22. Konus-Wind observation of GRB 081203A
  23. Konus-Wind observation of GRB 081203B
  24. GRB 081203B: optical observations
  25. Swift/UVOT detection of GRB081203B
  26. GRB 081203B: Swift-XRT candidate afterglow.
  27. GRB 081203A: optical observations
  28. GRB 081203: Enhanced Swift-XRT position
  29. GRB 081130B: MASTER prompt optical observations
  30. GRB081203: optical observation
  31. GRB 081203: Swift detection of a burst with a bright optical counterpart
  32. Swift Trigger 335971: Swift/UVOT Observations
  33. GRB 081126: afterglow photometry
  34. VLA Radio upper limit on GRB 081126
  35. GRB 081130: MASTER VWF prompt optical observations Fermi GRB
  36. GRB 081128A: optical observations
  37. Trigger 335971: Swift possible detection of a burst
  38. GRB081128: Swift/UVOT Upper Limits
  39. GRB 081128: Swift-XRT refined analysis
  40. GRB 081128: Liverpool Telescope afterglow confirmation
  41. GRB081128: optical observations
  42. GRB 081128: Enhanced Swift-XRT position
  43. GRB 081128: Optical observation of xinglong TNT
  44. GRB 081128: Swift detection of a burst
  45. GRB081126: Afterglow photometry from Crni Vrh
  46. GRB 081126: GRT Optical Observation
  47. GRB 081127: Swift/UVOT Upper Limits
  48. GRB 081127: Enhanced Swift-XRT position
  49. GRB 081126: Swift-XRT refined analysis
  50. GRB 081127: Swift detection of a burst
  51. GRB 081126: Swift/UVOT Observations
  52. GRB 081126: optical observations
  53. GRB 081126: Enhanced Swift-XRT position
  54. GRB 081126: TAROT Calern observatory optical observations
  55. GRB 081126: Swift detection of a burst
  56. GRB 081120: Fermi GBM detection
  57. GRB 081122: Fermi GBM detection
  58. Konus-Wind observation of GRB 081121
  59. GRB 081121, SMARTS optical/IR afterglow observations
  60. GRB081121: Refined Swift/UVOT observations
  61. GRB 081121: Swift-XRT refined analysis
  62. GRB 081121: Enhanced Swift-XRT position
  63. GRB 081121: GROND observations
  64. GRB 081121: Swift-BAT refined analysis
  65. GRB081121: Swift/UVOT observations
  66. GRB081118 : optical upper limit
  67. VLA Radio upper limit on GRB 081118
  68. GRB 081118: Swift-XRT refined analysis
  69. GRB 081118: GROND detection of afterglow
  70. GRB 081118: optical afterglow candidate
  71. GRB 081118: Swift UVOT Upper Limits
  72. GRB 081118: Enhanced Swift-XRT position
  73. GRB 081118: Swift detection of a burst
  74. GRB 081109A: confirmation of possible detection host galaxy
  75. Further Swift-XRT observations of the probable GRB 081105.
  76. GRB 081102: RTT150 Optical observations
  77. GRB 081110: Fermi GBM detection
  78. GRB 081109: TAROT La Silla observatory optical observations
  79. GRB 081102: MASTER refind and final results
  80. GRB 081109: GROND redshift limit and host extinction
  81. GRB 081025: Swift-XRT further analysis
  82. GRB 081024B: Swift-XRT late-time observations
  83. GRB 081109B: Swift/UVOT refined analysis
  84. GRB 081109: GROND Detection of the Optical/NIR Afterglow Candidate
  85. GRB 081109A, Swift-BAT refined analysis
  86. GRB 081109A: Swift-XRT refined analysis
  87. Swift-BAT Trigger 334129: possible burst
  88. GRB 081109: REM NIR afterglow detection
  89. GRB 081109: Swift detection of a burst
  90. SGR 1806-20: Fermi GBM detection
  91. GRB 081104: GROND found no Optical/NIR Afterglow
  92. GRB 081105: GROND Upper Limits
  93. Radio observation of GRB 080523 with ATCA
  94. Radio observation of GRB 080520 with ATCA
  95. GRB 081105: Observations from OSN
  96. Swift-XRT observations of GRB 081105
  97. GRB 081101B: Fermi GBM detection
  98. Radio observation of GRB 080516 with ATCA
  99. GRB 081105 Swift/BAT and IPN Localization
  100. GRB 081104: GROND Detection of the Optical/NIR Afterglow Candidate?

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