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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"

19952 results found.

  1. GRB 081210: Swift-XRT refined analysis
  2. GRB 081210: Enhanced Swift-XRT position
  3. GRB 081210: Swift-BAT refined analysis
  4. GRB 081210: Swift detection of a burst with optical afterglow
  5. IPN triangulation of short hard GRB 081209
  6. Radio observation of GRB 081121 with ATCA
  7. GRB 081203B: Suzaku WAM observation of the prompt emission
  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 081128: optical observation in CrAO
  12. GRB 081128: Optical afterglow observations
  13. GRB 081204: GROND Observations
  14. GRB 081204: Swift/UVOT Upper Limits
  15. GRB 081204: Swift XRT afterglow confirmation
  16. GRB 081204: Swift XRT afterglow candidate
  17. Swift-XRT observations of GRB 081203B
  18. Konus-Wind observation of GRB 081203A
  19. Konus-Wind observation of GRB 081203B
  20. GRB081203A: Swift-XRT refined analysis
  21. GRB 081203B: optical observations
  22. Swift/UVOT detection of GRB081203B
  23. GRB 081203B: Swift-XRT candidate afterglow.
  24. GRB 081203A: optical observations
  25. Swift UVOT observations of GRB 081203A
  26. GRB 081203B: Naming correction for burst detected in Swift-BAT slew data
  27. GRB081203A: Swift/UVOT grism redshift
  28. GRB 081203A: Burst detection from Swift-BAT slew data
  29. GRB 081203A: Swift-BAT refined analysis
  30. GRB 081203: Enhanced Swift-XRT position
  31. GRB081203: optical observation
  32. GRB 081203: Swift detection of a burst with a bright optical counterpart
  33. GRB 081128: optical observation
  34. Swift Trigger 335971: Swift/UVOT Observations
  35. GRB 081126: Fermi GBM detection
  36. Swift Trigger 335971 is probably not a real source
  37. Trigger 335971: Swift possible detection of a burst
  38. GRB081128: Swift/UVOT Upper Limits
  39. SGR 1806-20: Fermi GBM detection.
  40. GRB 081128: Swift-XRT refined analysis
  41. GRB081128: optical observations
  42. GRB 081128: Swift-BAT refined analysis
  43. GRB 081128: Enhanced Swift-XRT position
  44. GRB 081128: Swift detection of a burst
  45. GRB 081126: Swift observations continuing
  46. GRB081126: Afterglow photometry from Crni Vrh
  47. GRB 081126: GRT Optical Observation
  48. GRB 081127: Swift/UVOT Upper Limits
  49. GRB 081127: Swift-XRT refined analysis
  50. GRB 081127: Enhanced Swift-XRT position
  51. GRB 081126: Confirmation of the Optical Afterglow
  52. GRB 081127: Swift-BAT refined analysis
  53. GRB 081126: Swift-XRT refined analysis
  54. GRB 081127: Swift detection of a burst
  55. GRB 081126: Swift/UVOT Observations
  56. GRB 081126: optical observations
  57. GRB 081126: Swift-BAT refined analysis
  58. GRB 081126: Enhanced Swift-XRT position
  59. GRB 081126: TAROT Calern observatory optical observations
  60. GRB 081126: Swift detection of a burst
  61. Konus-Wind observation of GRB 081121
  62. GRB081121: Fermi GBM detection
  63. GRB081121: Refined Swift/UVOT observations
  64. GRB 081121: Swift-XRT refined analysis
  65. GRB 081121: Enhanced Swift-XRT position
  66. GRB 081121: GROND observations
  67. GRB 081121: Swift-BAT refined analysis
  68. GRB081121: Swift/UVOT observations
  69. GRB 081121: Swift detection of a burst
  70. GRB 081121: ROTSE-III Detection of Optical Counterpart
  71. GRB081118 : optical upper limit
  72. GRB 081118: Swift-XRT refined analysis
  73. GRB 081118: GROND detection of afterglow
  74. GRB 081118: Swift UVOT Upper Limits
  75. GRB 081118: Swift-BAT refined analysis
  76. GRB 081118: Enhanced Swift-XRT position
  77. GRB 081118: Swift detection of a burst
  78. GRB 081109A: confirmation of possible detection host galaxy
  79. Further Swift-XRT observations of the probable GRB 081105.
  80. GRB 081102: RTT150 Optical observations
  81. GRB 081109: TAROT La Silla observatory optical observations
  82. GRB 081102: MASTER refind and final results
  83. GRB 081109: GROND redshift limit and host extinction
  84. GRB 081025: Swift-XRT further analysis
  85. GRB 081024B: Swift-XRT late-time observations
  86. Swift-BAT refined analysis of trigger 334129
  87. GRB 081109B: Swift/UVOT refined analysis
  88. GRB 081109: GROND Detection of the Optical/NIR Afterglow Candidate
  89. GRB 081109A: Possible Swift-UVOT detection
  90. GRB 081109A, Swift-BAT refined analysis
  91. GRB 081109A: Swift-XRT refined analysis
  92. GRB 081109: Fermi GBM detection
  93. GRB 081109: Swift/UVOT upper limits
  94. Swift-BAT Trigger 334129: possible burst
  95. GRB 081109: Swift detection of a burst
  96. SGR 1806-20: Fermi GBM detection
  97. GRB 081105: GROND Upper Limits
  98. UVOT/Swift observations of GRB081105
  99. Swift-XRT observations of GRB 081105
  100. GRB 081105 Swift/BAT and IPN Localization

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