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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"

26505 results found.

  1. GRB081203A: Swift-XRT refined analysis
  2. GRB 081203B: optical observations
  3. GRB 081203A: optical observations
  4. GRB 081203B: Naming correction for burst detected in Swift-BAT slew data
  5. GRB 081203A: Burst detection from Swift-BAT slew data
  6. GRB 081203A: Swift-BAT refined analysis
  7. GRB 081203: Enhanced Swift-XRT position
  8. GRB 081130B: MASTER prompt optical observations
  9. GRB081203: optical observation
  10. GRB 081203: Swift detection of a burst with a bright optical counterpart
  11. GRB 081130B: Fermi GBM detection
  12. GRB 081126: Fermi GBM detection
  13. VLA Radio upper limit on GRB 081126
  14. GRB 081129: Fermi GBM detection
  15. GRB 081128A: optical observations
  16. GRB 081122B: Fermi GBM Detection
  17. GRB 081128: Swift-XRT refined analysis
  18. GRB 081128: Liverpool Telescope afterglow confirmation
  19. GRB081128: optical observations
  20. GRB081128 : Lulin optical follow-ups
  21. GRB 081128: Swift-BAT refined analysis
  22. GRB 081128: Enhanced Swift-XRT position
  23. GRB 081128: Swift detection of a burst
  24. GRB081126: Afterglow photometry from Crni Vrh
  25. GRB 081126: GRT Optical Observation
  26. GRB 081127: Swift/UVOT Upper Limits
  27. GRB 081127: Swift-XRT refined analysis
  28. GRB 081127: Enhanced Swift-XRT position
  29. GRB 081126: Confirmation of the Optical Afterglow
  30. GRB 081127: Swift-BAT refined analysis
  31. Konus-Wind observation of GRB 081126
  32. GRB 081126: Swift-XRT refined analysis
  33. GRB 081127: Swift detection of a burst
  34. GRB 081126: Swift/UVOT Observations
  35. GRB 081126: optical observations
  36. GRB 081126: Swift-BAT refined analysis
  37. GRB 081126: Enhanced Swift-XRT position
  38. GRB 081126: TAROT Calern observatory optical observations
  39. GRB 081126: Swift detection of a burst
  40. GRB 081125: Fermi GBM detection
  41. GRB 081124: Fermi GBM detection
  42. GRB 081120: Fermi GBM detection
  43. GRB 081118: Fermi GBM detection.
  44. GRB 081122: Fermi GBM detection
  45. Konus-Wind observation of GRB 081121
  46. GRB081121: Refined Swift/UVOT observations
  47. GRB 081121: Swift-XRT refined analysis
  48. GRB 081121: Enhanced Swift-XRT position
  49. GRB 081121: GROND observations
  50. GRB 081121: Swift-BAT refined analysis
  51. GRB081121: Swift/UVOT observations
  52. GRB 081121: Swift detection of a burst
  53. GRB 081119: Fermi GBM detection
  54. VLA Radio upper limit on GRB 081118
  55. GRB 081118: Swift-XRT refined analysis
  56. GRB 081118: GROND detection of afterglow
  57. GRB 081118: Swift-BAT refined analysis
  58. GRB 081118: Enhanced Swift-XRT position
  59. GRB 081118: Swift detection of a burst
  60. GRB 081109A: confirmation of possible detection host galaxy
  61. Further Swift-XRT observations of the probable GRB 081105.
  62. GRB 081113: Fermi GBM detection
  63. GRB 081102: RTT150 Optical observations
  64. GRB 081110: Fermi GBM detection
  65. GRB 081109: TAROT La Silla observatory optical observations
  66. GRB 081102: MASTER refind and final results
  67. GRB 081109: GROND redshift limit and host extinction
  68. Swift-BAT refined analysis of trigger 334129
  69. GRB 081109: GROND Detection of the Optical/NIR Afterglow Candidate
  70. GRB 081109A, Swift-BAT refined analysis
  71. GRB 081109A: Swift-XRT refined analysis
  72. GRB 081109: Fermi GBM detection
  73. GRB 081109A optical upper limit
  74. Swift-BAT Trigger 334129: possible burst
  75. GRB 081109: Swift detection of a burst
  76. GRB 081028 - PAIRITEL NIR detection
  77. GRB 081024C: Fermi Gamma-ray Burst Monitor detection
  78. SGR 1806-20: Fermi GBM detection
  79. GRB 081102B: Fermi GBM detection
  80. GRB 081105B: Fermi GBM detection
  81. GRB 081107: Fermi GBM detection
  82. GRB 081105: GROND Upper Limits
  83. Radio observation of GRB 080523 with ATCA
  84. Radio observation of GRB 080520 with ATCA
  85. GRB 081101B: Fermi GBM detection
  86. Radio observation of GRB 080516 with ATCA
  87. GRB 081025: Fermi GBM observation
  88. GRB 081104: GROND Detection of the Optical/NIR Afterglow Candidate?
  89. GRB 081104: Enhanced Swift-XRT position
  90. GRB 081104: Swift-BAT refined analysis
  91. Fermi-GBM detection of a Solar Flare
  92. Fermi Detection of GRB 081102
  93. GRB 081104: Swift detection of a burst
  94. Radio observation of GRB 080130 with ATCA
  95. GRB 081102: MASTER prompt optical limit
  96. GRB 081102: Swift-XRT refined analysis
  97. GRB 081102: Swift-BAT refined analysis
  98. GRB 081102: Enhanced Swift-XRT position
  99. Radio observation of GRB 080218b with ATCA
  100. Radio observation of GRB 080229a with ATCA

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