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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"

26533 results found.

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

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