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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"

19662 results found.

  1. GRB 100206A: optical observations from Southern Spain
  2. GRB 100205A: GROND upper limits
  3. GRB 100206A: Swift-XRT refined analysis
  4. GRB 100206A: Fermi GBM observation
  5. GRB 100206A: Swift-BAT refined analysis
  6. GRB 100206A: Enhanced Swift-XRT position
  7. GRB 100206A: Swift detection of a short hard burst
  8. GRB 100205A: Swift-BAT refined analysis
  9. GRB 100205A: Swift UVOT upper limits
  10. GRB 100205A: Swift XRT refined analysis
  11. GRB 100203A: Swift XRT and UVOT refined analyses
  12. GRB 100205A: Enhanced Swift-XRT position
  13. GRB 100205A: Swift detection of a burst
  14. GRB 100203A Detected in Ground Analysis of BAT Data
  15. GRB 100119A: Suzaku WAM observation of the prompt emission
  16. Konus-Wind observation of GRB 100119A
  17. GRB 100115A: Swift-XRT refined analysis
  18. GRB 100119A: Swift-BAT refined analysis
  19. GRB 100119A: Swift detection of a burst
  20. GRB 100117A: Fermi GBM detection
  21. Swift/UVOT refined analysis of GRB100117A
  22. GRB 100117A: Optical object inside the revised XRT error circle
  23. GRB 100117A: Swift-XRT refined analysis
  24. GRB 100117A: Swift-BAT refined analysis
  25. GRB 100117A: Swift detection of a short hard burst
  26. GRB 100115A: Enhanced Swift-XRT position
  27. GRB 100116A: Fermi LAT detection
  28. NOT observation of GRB100115A localization
  29. GRB 100115A: SARA Afterglow Candidate
  30. GRB 100115A: Swift/UVOT Upper Limits
  31. GRB 100115A: Swift-XRT candidate afterglow
  32. GRB 100115A detected in ground analysis of Swift-BAT data
  33. GRB 100111A: PAIRITEL NIR Upper Limits
  34. GRB 100111A: Swift UVOT Refined Analysis
  35. GRB 100111A: Swift-BAT refined analysis
  36. GRB 100111A: Enhanced Swift-XRT position
  37. GRB100111A: Swift-XRT refined analysis
  38. GRB 100111A: Fermi GBM observation
  39. GRB 100111A: Swift detection of a burst with an optical afterglow
  40. Swift/BAT Detects an Outburst from XTE J1901+014
  41. Swift Trigger #382159 is due to XTE J1752-223
  42. GRB 100103A: Swift-XRT team refined analysis
  43. GRB 100103A - UVOT-enhanced XRT position
  44. GRB 100103A: Swift/UVOT Upper Limits
  45. GRB 100103A: Correction to Swift position error
  46. GRB 100103A: Swift/XRT position
  47. Swift Trigger 381591: Retraction of Reported UVOT Source
  48. Swift Trigger 381591 is probably not a burst
  49. Swift Trigger 381591: Uncatalogued UVOT Source
  50. GRB 091230: Swift/UVOT Observations
  51. Trigger 381591: Swift detection of a possible burst
  52. GRB 091230: Swift-XRT observation
  53. Swift Trigger 381434 is not a GRB
  54. Trigger 381434: Swift detection of a possible burst
  55. GRB 091221 : IRSF NIR upper limit
  56. GRB 091221: Skynet/PROMPT Detections
  57. GRB 091221: Fermi GBM Observation
  58. GRB 091117: Swift-XRT late time observations
  59. GRB 091221 Swift-BAT refined analysis
  60. GRB091221: Swift/UVOT refined analysis, correction.
  61. GRB 091221: Swift/UVOT refined analysis
  62. GRB 091221: Swift-XRT refined analysis
  63. GRB 091221: Enhanced Swift-XRT position
  64. GRB 091221: UVOT Confirmation of an Optical Afterglow
  65. GRB 091221: ROTSE-III Detection of Optical Counterpart
  66. GRB 091221: Swift detection of a burst
  67. Swift trigger 379449 (possible GRB) is not a burst
  68. Trigger 379449: Swift detection of a possible burst
  69. GRB 091208A: Suzaku WAM observation of the prompt emission
  70. Konus-Wind observation of GRB 091208A
  71. GRB091208A: Swift/UVOT refined analysis
  72. GRB 091208B: optical observations
  73. GRB 091208B: GROND observations
  74. GRB 091208A: Swift-XRT observations
  75. GRB 091208B: Swift-XRT refined analysis
  76. GRB091208B: Swift/UVOT refined analysis
  77. GRB 091208B: Fermi GBM observation
  78. GRB 091208B, Swift-BAT refined analysis
  79. GRB 091208A Swift-BAT refined analysis
  80. GRB 091208B: Faulkes Telescope North and South Optical Afterglow
  81. GRB 091208A, RIMOTS optical upper limits
  82. GRB 091208B: Enhanced Swift-XRT position
  83. GRB 091208B, RIMOTS optical upper limits
  84. GRB 091208B: Swift detection of a burst with an optical afterglow
  85. GRB 091208B: BOOTES-3 optical afterglow
  86. GRB 091208: ROTSE-III Optical Limits
  87. GRB 091208: Swift detection of a burst
  88. GRB091127: Continuing Swift/UVOT Observations
  89. GRB091202: Swift-XRT refined analysis
  90. GRB 091202: Swift/UVOT Upper Limits
  91. GRB 091202 - UVOT-enhanced XRT position
  92. GRB 091127: Zadko Telescope Observations
  93. GRB 091117: Chandra Observations
  94. GRB 091127: Suzaku WAM observation of the prompt emission
  95. GRB 091130B: Swift-XRT team refined analysis
  96. GRB 091130B: Swift-BAT refined analysis
  97. GRB 091130B: Swift/UVOT Upper Limits
  98. GRB 091127: Skynet/PROMPT Observations of Fading
  99. GRB 091130B: Enhanced Swift-XRT position
  100. Swift trigger 377436 (possible GRB 091130A) is not a burst

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