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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"

12180 results found.

  1. GRB 131117A: Swift detection of a burst
  2. GRB 130925A: HST imaging
  3. Konus-Wind observation of GRB 131108A
  4. GRB 131108A: AGILE/GRID observation
  5. GRB 131108A: Fermi GBM observation
  6. GRB 131108A: Swift-XRT observations
  7. GRB 131108A: Fermi-LAT refined analysis
  8. IPN triangulation of GRB 131108A
  9. GRB 131108A: Fermi-LAT onboard detection of a burst
  10. GRB 131029A: Suzaku WAM observation of the prompt emission
  11. GRB 131105A: Swift-XRT refined Analysis
  12. Konus-Wind observation of GRB 131105A
  13. GRB 131105A: Swift detection of a burst
  14. GRB 131103A: Swift-XRT refined Analysis
  15. GRB 131103A: Swift detection of a burst
  16. Konus-Wind observation of GRB 131031A
  17. GRB 131030A: Swift-XRT refined Analysis
  18. GRB 131024C: ICSP discovery of a burst in X-rays by balloon borne study
  19. GRB 131030A: Swift/UVOT Detection
  20. Konus-Wind observation of GRB 131030A
  21. GRB 131030A: D50+BART detection and light curve optical decay
  22. GRB 131030A: Watcher OT detection
  23. GRB 131030A: Swift detection of a burst with an optical counterpart
  24. GRB 131029A: Fermi GBM observation
  25. GRB 131029A: Fermi-LAT detection of a burst
  26. Konus-Wind observation of GRB 131028A
  27. Swift Trigger 575905/possible GRB 131026A: Swift-XRT observations
  28. Swift Trigger 575905: ROTSE-III Optical Limits
  29. Swift Trigger 575905: KAIT Optical Upper Limit
  30. GRB 131024B: Swift-XRT refined Analysis
  31. GRB 131024A: GROND upper limits
  32. GRB 131024A: Swift-XRT refined Analysis
  33. GRB 131024B: Swift detection of a burst
  34. GRB 131024A, Swift-BAT refined analysis
  35. Konus-Wind observation of GRB 131011B
  36. GRB 131024A: Swift detection of a burst
  37. GRB 131018B: Swift-XRT observations
  38. GRB 131018B: Fermi-LAT detection of a burst
  39. GRB 131018A: KAIT Optical Upper Limit
  40. Konus-Wind observation of GRB 131014A
  41. GRB 131014A: Fermi-LAT detection
  42. Swift-XRT detection of iPTF 13dsw/Fermi403206457
  43. Trigger 574266 is not a Swift detection of a known source
  44. GRB 131004A: Swift-XRT refined Analysis
  45. GRB 131004A: Swift detection of a burst (may be short)
  46. GRB 131002B, Swift-BAT refined analysis
  47. GRB 131002B: Swift-XRT Refined Analysis
  48. GRB 131002A: Swift-XRT refined Analysis
  49. NuSTAR observations of GRB 130925A
  50. GRB 131002A: Swift detection of a burst
  51. GRB 130925A: continuing Swift/XRT monitoring
  52. Fermi LAT Upper Limits on GRB 130925A
  53. Konus-Wind observation of GRB 130925A
  54. GRB 130925A: Historical non-detection from Rosat-HRI
  55. GRB 130925A: Swift-XRT refined Analysis
  56. GRB 130925A: MAXI/GSC detection
  57. IPN Triangulation of SGR-like burst 130913 - probable association with SGR/AXP 1E1841-045
  58. INTEGRAL detection of a SGR-like burst likely from SGR J1745-29
  59. GRB 130919A: Skynet PROMPT-CTIO optical upper limits
  60. Fermi/GBM Detection of two SGR-like bursts possibly associated with SGR J1833-0832
  61. Konus-Wind observation of GRB 130912A
  62. GRB 130912A: WHT confirmation of optical counterpart
  63. GRB 130907A: MASTER refined analysis
  64. GRB 130912A: KAIT optical upper limit
  65. Konus-Wind observation of GRB 130907A
  66. GRB 130907A: Swift-XRT refined Analysis
  67. GRB 120916A: Fermi-LAT detection of a burst
  68. GRB 130907A: Swift/UVOT Detection
  69. GRB 130831A: ISON-Kislovodsk optical observations
  70. GRB 130831A: ISON-UAFO optical observations
  71. GRB 130903A: GROND Upper Limits
  72. GRB 130903A: A long GRB detected by INTEGRAL
  73. GRB 130831A: Continued Skynet/PROMPT-SSO, PROMPT-CTIO and Yerkes-41 detections
  74. GRB 130831A, Swift-BAT refined analysis
  75. GRB 130831B: Swift-XRT refined Analysis
  76. GRB 130831A: Swift-XRT refined Analysis
  77. GRB 130831A: Montarrenti Observatory optical observations
  78. Konus-Wind observation of GRB 130831A
  79. GRB 130831B: Swift detection of a burst
  80. GRB 130831A: Swift detection of a burst with an optical counterpart
  81. GRB 130829A: NOT optical observations
  82. GRB 130828A: Fermi GBM detection
  83. GRB 130828A: Fermi-LAT detection of a burst
  84. Konus-Wind observation of GRB 130821A
  85. GRB 130821A: Weihai optical upper limit
  86. GRB 130821A: Fermi-LAT detection of a burst
  87. GRB 130822A: Weihai optical upper limit
  88. GRB 130822A: Swift detection of a short burst
  89. GRB 130816B: GROND afterglow candidate
  90. GRB 130816B: Swift detection of a burst
  91. Konus-Wind observation of GRB 130812B
  92. Konus-Wind observation of GRB 130804A
  93. SGR 1745-29 (Swift trigger 565443), Swift-BAT refined analysis
  94. Trigger 565443: Swift detection of a burst from SGR J1745-29
  95. GRB 130803A: Swift-XRT refined Analysis
  96. GRB 130803A: Swift detection of a burst
  97. Konus-Wind observation of GRB 130727A
  98. GRB 130727A: Swift-XRT refined Analysis
  99. GRB 130727A: Swift-XRT observations
  100. GRB 130725A: Swift-XRT refined Analysis

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