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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"

24432 results found.

  1. GRB 100205A: Swift-BAT refined analysis
  2. GRB 100205A: Swift XRT refined analysis
  3. GRB 100205A: Gemini-South Observations
  4. GRB 100131A: Suzaku WAM observation of the prompt emission
  5. GRB 100131A: Fermi GBM detection
  6. GRB 100119A: Suzaku WAM observation of the prompt emission
  7. Konus-Wind observation of GRB 100119A
  8. GRB 100122A: Fermi GBM detection
  9. GRB 100122A: MASTER-Net optical observations
  10. GRB 100116A: Suzaku WAM observation of the prompt emission
  11. GRB 100119A: Swift-BAT refined analysis
  12. Konus-Wind observation of GRB 100116A
  13. GRB 100117A: Fermi GBM detection
  14. GRB 100117A: Gemini South Imaging and CFHT Pre-Explosion Images
  15. GRB 100117A: Swift-BAT refined analysis
  16. GRB100117A: Possible afterglow from NOT observation
  17. GRB 100117A: Swift detection of a short hard burst
  18. GRB 100116A: Fermi LAT detection
  19. NOT observation of GRB100115A localization
  20. GRB 100115A: SARA Afterglow Candidate
  21. GRB 100111A: PAIRITEL NIR Upper Limits
  22. GRB 100111A: Swift-BAT refined analysis
  23. GRB 100111A: Fermi GBM observation
  24. GRB 100111A: Swift detection of a burst with an optical afterglow
  25. Swift/BAT Detects an Outburst from XTE J1901+014
  26. GRB 100103A: GROND Upper Limits
  27. Konus-Wind observation of GRB 100103A
  28. GRB 100103A: a long GRB detected with INTEGRAL
  29. Swift Trigger 381591: Retraction of Reported UVOT Source
  30. Swift Trigger 381591 is probably not a burst
  31. Trigger 381591: Swift detection of a possible burst
  32. GRB 091230: a long GRB detected by INTEGRAL
  33. GRB 091221: Skynet/PROMPT Detections
  34. GRB 091221: Fermi GBM Observation
  35. GRB 091117: Swift-XRT late time observations
  36. GRB 091221 Swift-BAT refined analysis
  37. GRB 091221: ROTSE-III Detection of Optical Counterpart
  38. Swift trigger 379449 (possible GRB) is not a burst
  39. GRB 091215: Faulkes Telescope North observations
  40. GRB 091208B: Xinglong TNT optical observation
  41. GRB 091208A: Suzaku WAM observation of the prompt emission
  42. Konus-Wind observation of GRB 091208A
  43. GRB 091208B: GROND observations
  44. GRB091208B: Swift/UVOT refined analysis
  45. GRB 091208B: Fermi GBM observation
  46. GRB 091208B, Swift-BAT refined analysis
  47. GRB 091208A Swift-BAT refined analysis
  48. GRB 091208B: Faulkes Telescope North and South Optical Afterglow
  49. GRB 091208A, RIMOTS optical upper limits
  50. GRB 091208B, RIMOTS optical upper limits
  51. GRB 091208B: BOOTES-3 optical afterglow
  52. GRB 091208: ROTSE-III Optical Limits
  53. GRB 091208: Swift detection of a burst
  54. A small revision to the GRB-naming convention
  55. GRB 091123: Suzaku WAM observation of the prompt emission
  56. GRB 091127, SMARTS optical/IR afterglow observations
  57. GRB091202: Swift-XRT refined analysis
  58. GRB 091202: Liverpool Telescope observations
  59. GRB 091127: Zadko Telescope Observations
  60. GRB 091126A: Suzaku WAM observation of the prompt emission
  61. GRB 091202: Liverpool Telescope Observations
  62. GRB 091202: a long GRB detected by INTEGRAL
  63. GRB 091117: Chandra Observations
  64. GRB 091020: MASTER-Net optical polarization observations
  65. Konus-Wind observation of very long GRB 091123
  66. GRB 091130A: Xinglong TNT upper limit
  67. GRB 091123: Fermi GBM detection of a very long burst
  68. GRB 091126B: Fermi GBM detection
  69. GRB 091127: Suzaku WAM observation of the prompt emission
  70. GRB 091126: Fermi GBM detection
  71. GRB 091130B: Swift-BAT refined analysis
  72. GRB 091127: Skynet/PROMPT Observations of Fading
  73. Swift trigger 377436 (possible GRB 091130A) is not a burst
  74. GRB 091130B: MASTER observations
  75. GRB 091130B: SDSS galaxy at XRT location
  76. GRB 091130: MASTER observations
  77. GRB 091130: Swift detection of a possible burst
  78. GRB 091128: Fermi GBM detection
  79. Konus-Wind observation of GRB 091127
  80. GRB 091127: Fermi GBM detection
  81. GRB 091127: MASTER early optical transient polarimetry
  82. GRB 091127: Swift-BAT refined analysis
  83. GRB 091127: REM NIR afterglow detection
  84. GRB 091127: Liverpool Telescope afterglow candidate
  85. GRB 091127: Swift detection of a burst
  86. Konus-Wind observation of GRB 091120
  87. GRB 091120: MAXI GSC detection
  88. GRB 091120: Fermi GBM observation
  89. GRB 091117A: Suzaku WAM observation of the prompt emission
  90. GRB 091117 BAT refined analysis
  91. GRB091117: Gemini South Observations
  92. Konus-Wind observations of GRB 091117A
  93. GRB 091112: Suzaku WAM observation of the prompt emission
  94. GRB 091102A: Suzaku WAM observation of the prompt emission
  95. GRB 091109B: Suzaku WAM observation of the prompt emission
  96. GRB091111: Swift XRT refined analysis
  97. Konus-Wind and Konus-RF observations of GRB 091031
  98. GRB 091112: Swift-BAT refined analysis
  99. GRB 091112: Fermi GBM observation
  100. GRB 091031: Fermi LAT detection of a faint burst

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