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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"

19610 results found.

  1. IPN triangulation of bright GRB 081215A
  2. GRB 081221: Swift-XRT Refined Analysis
  3. GRB 081221: pseudo-redshift (pz=0.7) from the spectral parameters of the prompt emission
  4. GRB081222, optical observation
  5. GRB081222: Swift/UVOT detection of an optical afterglow
  6. GRB 081222: GROND Detection of the Optical/NIR Afterglow
  7. GRB 081222: Swift detection of a burst with a bright optical afterglow
  8. GRB 081221: Enhanced Swift-XRT position
  9. GRB 081221: Swift detection of a burst
  10. Modification of Swift/UVOT response to bright GRBs
  11. GRB 081211B: Further Swift-XRT analysis
  12. GRB 081211B - possibly a short burst with extended emission
  13. Possible GRB 081211B: Swift/UVOT Upper Limits
  14. GRB 081210: optical observations
  15. Possible GRB 081211B - Swift-XRT analysis
  16. GRB 081211B(?): Possible burst detection from Swift-BAT slew data
  17. GRB 081211: Swift-BAT refined analysis
  18. GRB 081211: Swift XRT refined analysis
  19. GRB 081211: Swift/UVOT detection of an optical afterglow
  20. GRB 081211: Enhanced Swift-XRT position
  21. GRB 081210: Swift/UVOT refined analysis
  22. GRB 081211: Swift detection of a burst
  23. GRB 081210: Swift-XRT refined analysis
  24. GRB 081210: Enhanced Swift-XRT position
  25. GRB 081210: Swift-BAT refined analysis
  26. GRB 081210: Swift detection of a burst with optical afterglow
  27. IPN triangulation of short hard GRB 081209
  28. Radio observation of GRB 081121 with ATCA
  29. GRB 081203B: Suzaku WAM observation of the prompt emission
  30. Radio observation of GRB 081029 with ATCA
  31. Radio observation of GRB 081008 with ATCA
  32. GRB081203A: Ashra-1 observation of early optical and VHE-neutrino emission
  33. GRB 081128: optical observation in CrAO
  34. GRB 081128: Optical afterglow observations
  35. GRB 081204: GROND Observations
  36. GRB 081204: Swift/UVOT Upper Limits
  37. GRB 081204: Swift XRT afterglow confirmation
  38. GRB 081204: Swift XRT afterglow candidate
  39. Swift-XRT observations of GRB 081203B
  40. Konus-Wind observation of GRB 081203A
  41. Konus-Wind observation of GRB 081203B
  42. GRB081203A: Swift-XRT refined analysis
  43. GRB 081203B: optical observations
  44. Swift/UVOT detection of GRB081203B
  45. GRB 081203B: Swift-XRT candidate afterglow.
  46. GRB 081203A: optical observations
  47. Swift UVOT observations of GRB 081203A
  48. GRB 081203B: Naming correction for burst detected in Swift-BAT slew data
  49. GRB081203A: Swift/UVOT grism redshift
  50. GRB 081203A: Burst detection from Swift-BAT slew data
  51. GRB 081203A: Swift-BAT refined analysis
  52. GRB 081203: Enhanced Swift-XRT position
  53. GRB081203: optical observation
  54. GRB 081203: Swift detection of a burst with a bright optical counterpart
  55. GRB 081128: optical observation
  56. Swift Trigger 335971: Swift/UVOT Observations
  57. GRB 081126: Fermi GBM detection
  58. Swift Trigger 335971 is probably not a real source
  59. Trigger 335971: Swift possible detection of a burst
  60. GRB081128: Swift/UVOT Upper Limits
  61. GRB 081128: Swift-XRT refined analysis
  62. GRB081128: optical observations
  63. GRB 081128: Swift-BAT refined analysis
  64. GRB 081128: Enhanced Swift-XRT position
  65. GRB 081128: Swift detection of a burst
  66. GRB 081126: Swift observations continuing
  67. GRB081126: Afterglow photometry from Crni Vrh
  68. GRB 081126: GRT Optical Observation
  69. GRB 081127: Swift/UVOT Upper Limits
  70. GRB 081127: Swift-XRT refined analysis
  71. GRB 081127: Enhanced Swift-XRT position
  72. GRB 081126: Confirmation of the Optical Afterglow
  73. GRB 081127: Swift-BAT refined analysis
  74. GRB 081126: Swift-XRT refined analysis
  75. GRB 081127: Swift detection of a burst
  76. GRB 081126: Swift/UVOT Observations
  77. GRB 081126: optical observations
  78. GRB 081126: Swift-BAT refined analysis
  79. GRB 081126: Enhanced Swift-XRT position
  80. GRB 081126: TAROT Calern observatory optical observations
  81. GRB 081126: Swift detection of a burst
  82. Konus-Wind observation of GRB 081121
  83. GRB081121: Fermi GBM detection
  84. GRB081121: Refined Swift/UVOT observations
  85. GRB 081121: Swift-XRT refined analysis
  86. GRB 081121: Enhanced Swift-XRT position
  87. GRB 081121: GROND observations
  88. GRB 081121: Swift-BAT refined analysis
  89. GRB081121: Swift/UVOT observations
  90. GRB 081121: Swift detection of a burst
  91. GRB 081121: ROTSE-III Detection of Optical Counterpart
  92. GRB081118 : optical upper limit
  93. GRB 081118: Swift-XRT refined analysis
  94. GRB 081118: GROND detection of afterglow
  95. GRB 081118: Swift UVOT Upper Limits
  96. GRB 081118: Swift-BAT refined analysis
  97. GRB 081118: Enhanced Swift-XRT position
  98. GRB 081118: Swift detection of a burst
  99. GRB 081109A: confirmation of possible detection host galaxy
  100. Further Swift-XRT observations of the probable GRB 081105.

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