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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"

26501 results found.

  1. GRB 081203A: Burst detection from Swift-BAT slew data
  2. GRB 081203A: Swift-BAT refined analysis
  3. GRB 081203: Enhanced Swift-XRT position
  4. GRB 081130B: MASTER prompt optical observations
  5. GRB081203: optical observation
  6. GRB 081203: Swift detection of a burst with a bright optical counterpart
  7. GRB 081130B: Fermi GBM detection
  8. GRB 081126: Fermi GBM detection
  9. VLA Radio upper limit on GRB 081126
  10. GRB 081129: Fermi GBM detection
  11. GRB 081128A: optical observations
  12. GRB 081122B: Fermi GBM Detection
  13. GRB 081128: Swift-XRT refined analysis
  14. GRB 081128: Liverpool Telescope afterglow confirmation
  15. GRB081128: optical observations
  16. GRB081128 : Lulin optical follow-ups
  17. GRB 081128: Swift-BAT refined analysis
  18. GRB 081128: Enhanced Swift-XRT position
  19. GRB 081128: Swift detection of a burst
  20. GRB081126: Afterglow photometry from Crni Vrh
  21. GRB 081126: GRT Optical Observation
  22. GRB 081127: Swift/UVOT Upper Limits
  23. GRB 081127: Swift-XRT refined analysis
  24. GRB 081127: Enhanced Swift-XRT position
  25. GRB 081126: Confirmation of the Optical Afterglow
  26. GRB 081127: Swift-BAT refined analysis
  27. Konus-Wind observation of GRB 081126
  28. GRB 081126: Swift-XRT refined analysis
  29. GRB 081127: Swift detection of a burst
  30. GRB 081126: Swift/UVOT Observations
  31. GRB 081126: optical observations
  32. GRB 081126: Swift-BAT refined analysis
  33. GRB 081126: Enhanced Swift-XRT position
  34. GRB 081126: TAROT Calern observatory optical observations
  35. GRB 081126: Swift detection of a burst
  36. GRB 081125: Fermi GBM detection
  37. GRB 081124: Fermi GBM detection
  38. GRB 081120: Fermi GBM detection
  39. GRB 081118: Fermi GBM detection.
  40. GRB 081122: Fermi GBM detection
  41. Konus-Wind observation of GRB 081121
  42. GRB081121: Refined Swift/UVOT observations
  43. GRB 081121: Swift-XRT refined analysis
  44. GRB 081121: Enhanced Swift-XRT position
  45. GRB 081121: GROND observations
  46. GRB 081121: Swift-BAT refined analysis
  47. GRB081121: Swift/UVOT observations
  48. GRB 081121: Swift detection of a burst
  49. GRB 081119: Fermi GBM detection
  50. VLA Radio upper limit on GRB 081118
  51. GRB 081118: Swift-XRT refined analysis
  52. GRB 081118: GROND detection of afterglow
  53. GRB 081118: Swift-BAT refined analysis
  54. GRB 081118: Enhanced Swift-XRT position
  55. GRB 081118: Swift detection of a burst
  56. GRB 081109A: confirmation of possible detection host galaxy
  57. Further Swift-XRT observations of the probable GRB 081105.
  58. GRB 081113: Fermi GBM detection
  59. GRB 081102: RTT150 Optical observations
  60. GRB 081110: Fermi GBM detection
  61. GRB 081109: TAROT La Silla observatory optical observations
  62. GRB 081102: MASTER refind and final results
  63. GRB 081109: GROND redshift limit and host extinction
  64. Swift-BAT refined analysis of trigger 334129
  65. GRB 081109: GROND Detection of the Optical/NIR Afterglow Candidate
  66. GRB 081109A, Swift-BAT refined analysis
  67. GRB 081109A: Swift-XRT refined analysis
  68. GRB 081109: Fermi GBM detection
  69. GRB 081109A optical upper limit
  70. Swift-BAT Trigger 334129: possible burst
  71. GRB 081109: Swift detection of a burst
  72. GRB 081028 - PAIRITEL NIR detection
  73. GRB 081024C: Fermi Gamma-ray Burst Monitor detection
  74. SGR 1806-20: Fermi GBM detection
  75. GRB 081102B: Fermi GBM detection
  76. GRB 081105B: Fermi GBM detection
  77. GRB 081107: Fermi GBM detection
  78. GRB 081105: GROND Upper Limits
  79. Radio observation of GRB 080523 with ATCA
  80. Radio observation of GRB 080520 with ATCA
  81. GRB 081101B: Fermi GBM detection
  82. Radio observation of GRB 080516 with ATCA
  83. GRB 081025: Fermi GBM observation
  84. GRB 081104: GROND Detection of the Optical/NIR Afterglow Candidate?
  85. GRB 081104: Enhanced Swift-XRT position
  86. GRB 081104: Swift-BAT refined analysis
  87. Fermi-GBM detection of a Solar Flare
  88. Fermi Detection of GRB 081102
  89. GRB 081104: Swift detection of a burst
  90. Radio observation of GRB 080130 with ATCA
  91. GRB 081102: MASTER prompt optical limit
  92. GRB 081102: Swift-XRT refined analysis
  93. GRB 081102: Swift-BAT refined analysis
  94. GRB 081102: Enhanced Swift-XRT position
  95. Radio observation of GRB 080218b with ATCA
  96. Radio observation of GRB 080229a with ATCA
  97. GRB 081102: Swift detection of a burst
  98. GRB 081101 (or SGR 0623-0006 ): Fermi GBM detection
  99. SGR 0623-0006 or GRB 081101: Swift-BAT/-XRT refined analysis
  100. Swift-BAT triggered on a probable GRB 081101 (trigger=333320)

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