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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"

26532 results found.

  1. GRB 121225B: Suzaku WAM observation of the prompt emission
  2. GRB 130102B: MASTER synchronous observations
  3. Konus-Wind observation of GRB 130102B
  4. GRB 130102A: Swift-BAT refined analysis
  5. GRB 130102A: Swift-XRT refined Analysis
  6. GRB 130102A: Enhanced Swift-XRT position
  7. GRB 130102A: Swift detection of a burst
  8. GRB 121229A: Swift-XRT refined Analysis
  9. GRB 121229A, Swift-BAT refined analysis
  10. GRB 121229A: Enhanced Swift-XRT position
  11. Swift Trigger 544381 is unlikely to be a GRB
  12. GRB 121229A: MAXI/GSC detection
  13. GRB 121229A: Swift detection of a burst
  14. GRB 121226A, Swift-BAT refined analysis
  15. GRB 121226A: Zadko observatory - Gingin optical observations
  16. GRB 121226A: BOOTES-4/MET optical observations
  17. GRB 121226A: Swift detection of a burst
  18. Konus-Wind observation of GRB 121225B
  19. IPN Triangulation of GRB 121225B
  20. GRB 121225B: Fermi GBM observation
  21. Trigger 543763: SGR 1E 1841-045: Swift detection of a soft gamma repeater burst (aka Kes 73)
  22. GRB 121217A: ATCA 44GHz upper limit
  23. GRB 121217A: Swift-BAT refined analysis
  24. GRB 121217A: Fermi GBM observation
  25. GRB 121217A: Swift-XRT refined Analysis
  26. GRB 121217A: Enhanced Swift-XRT position
  27. GRB 121217A: Swift detection of a burst
  28. GRB 121123A: NIKA (New IRAM KID Arrays) millimetre observations at the 30-m Pico Veleta telescope
  29. GRB 121212A: LOAO IzY Observation
  30. GRB 121209A: MAXI/GSC detection
  31. GRB121212A: NOT optical imaging
  32. GRB 121211A: Fermi GBM observation
  33. GRB 121212A: RAPTOR Limits During Gamma-Ray Emitting Interval
  34. GRB 121212A: Swift-XRT refined Analysis
  35. GRB 121212A: Swift-BAT refined analysis
  36. GRB 121211A: Swift-BAT refined analysis
  37. GRB 121212A: Enhanced Swift-XRT position
  38. GRB 121212A: A long GRB detected by INTEGRAL
  39. GRB 121212A: Swift detection of a burst
  40. GRB 121211A: Swift/UVOT Detection
  41. GRB 121211A: Swift-XRT refined Analysis
  42. GRB 121211A: Enhanced Swift-XRT position
  43. GRB 121211A - Faulkes Telescope North afterglow confirmation
  44. GRB 121211A: Swift detection of a burst with an optical counterpart
  45. GRB 121209A: Keck observations
  46. GRB 121209A: Swift-XRT refined Analysis
  47. GRB 121209A: Swift-BAT refined analysis
  48. GRB 121209A: Enhanced Swift-XRT position
  49. GRB 121209A: Swift detection of a burst
  50. GRB 121127A: Suzaku WAM observation of the prompt emission
  51. GRB 121122A: Suzaku WAM observation of the prompt emission
  52. GRB 121202A: Swift-XRT refined Analysis
  53. GRB 121202A: Fermi GBM observation
  54. GRB 121202A: Enhanced Swift-XRT position
  55. GRB 121202A: Swift-BAT refined analysis
  56. GRB 121202A: TAROT Calern observatory optical observations
  57. GRB 121202A: Swift detection of a burst
  58. GRB 121201A: Swift-XRT refined Analysis
  59. GRB 121201A: Swift-BAT refined analysis
  60. GRB 121201A: Enhanced Swift-XRT position
  61. GRB 121201A: BOOTES-4 optical observations
  62. GRB 121201A: a GRB with an optical counterpart
  63. Konus-Wind observation of GRB 121127A
  64. IPN Triangulation of GRB 121127A (short/hard)
  65. GRB 121128A: Swift/UVOT Detection
  66. GRB 121128A: Swift-XRT refined Analysis
  67. GRB 121128A: Enhanced Swift-XRT position
  68. GRB 121122A: Fermi GBM observation
  69. GRB 121128A: Fermi GBM observation
  70. GRB 121128A, Swift-BAT refined analysis
  71. Konus-Wind observation of GRB 121128A
  72. GRB 121128A: FTN optical afterglow confirmation
  73. GRB 121128A: Swift detection of a burst with an optical counterpart
  74. GRB 121123A: Suzaku WAM observation of the prompt emission
  75. Konus-Wind observation of GRB 121122A
  76. GRB 121117A: Terskol obseravtions
  77. GRB 121123A: Swift/UVOT Observations
  78. IPN Triangulation of GRB 121122A (long/intense)
  79. GRB 121118B: Suzaku WAM observation of the prompt emission
  80. GRB 121125A: Swift-XRT refined Analysis
  81. GRB 121125A: Enhanced Swift-XRT position
  82. GRB 121125A: Fermi GBM Observation
  83. GRB 121125A: Swift-BAT refined analysis
  84. GRB 121125A: Swift detection of a burst with optical counterpart
  85. GRB 121123A: GROND observations
  86. GRB 121123A: Enhanced Swift-XRT position
  87. GRB 121123A: Swift-BAT refined analysis
  88. GRB 121123A: BOOTES-4 and IAC80 optical observations
  89. GRB 121123A: NOT optical observations
  90. GRB 121123A: Fermi GBM observation
  91. GRB 121123A: Swift detection of a burst with optical counterpart
  92. Konus-Wind observation of GRB 121118B
  93. IPN Triangulation of GRB 121118B (long/intense)
  94. GRB 121117A: GROND confirmation of the UVOT afterglow candidate
  95. IPN Triangulation of GRB 121118A
  96. GRB 121117A, Swift-BAT refined analysis
  97. GRB 121117A: BOOTES-3 early optical upper limit
  98. GRB 121117A: Swift detection of a burst
  99. GRB 121108A: Swift-XRT refined Analysis
  100. GRB 121108A, Swift-BAT refined analysis

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