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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. LIGO/Virgo G297595: Swift/BAT data search
  2. GRB 170813A: Swift/UVOT Upper Limits
  3. GRB 170813A: Swift-BAT refined analysis
  4. GRB 170813A: RATIR Optical and NIR Observations
  5. GRB 170810A: AbAO optical upper limit
  6. GRB 170813A: Swift-XRT refined Analysis
  7. GRB 170813A: Enhanced Swift-XRT position
  8. GRB 170813A: Swift detection of a burst
  9. GRB 170728B: 15 GHz upper limits from AMI
  10. GRB 170728A: 15 GHz upper limits from AMI
  11. GRB 170714A: 15 GHz upper limits from AMI
  12. GRB 170711A: 15 GHz upper limits from AMI
  13. GRB 170710B: 15 GHz upper limits from AMI
  14. GRB 170626A: 15 GHz upper limits from AMI
  15. GRB 170810A: Swift-BAT refined analysis
  16. GRB 170810A: Swift-XRT refined Analysis
  17. GRB 170810A: Swift/UVOT Detection
  18. GRB 170810A: Fermi GBM observation
  19. GRB 170810A: Fermi-LAT detection
  20. GRB 170810A: Enhanced Swift-XRT position
  21. GRB 170810A: Swift detection of a burst with a bright optical counterpart
  22. LIGO/Virgo G296853: Swift/BAT data search
  23. GRB 170808B: Fermi LAT Detection
  24. IPN Triangulation of GRB 170805A (short)
  25. Konus-Wind observation of GRB 170724A
  26. GRB 170807A: Swift-BAT refined analysis
  27. GRB 170805A: Insight-HXMT detection
  28. GRB 170807A: Swift detection of a burst
  29. GRB 170728B: TShAO, SAO RAS and AbAO optical observations
  30. GRB 170803A: Swift/BAT spectral lag results
  31. GRB 170804A: LCO Observations
  32. GRB 170804A: Swift-BAT refined analysis
  33. GRB 170804A: Swift/UVOT Detection
  34. GRB 170804A: Swift-XRT refined Analysis
  35. GRB 170804A: Enhanced Swift-XRT position
  36. GRB 170803A: Swift-BAT refined analysis
  37. GRB 170803A: Swift/UVOT Detection
  38. GRB 170804A: Swift detection of a burst with optical counterpart
  39. Swift Trigger 766161 is not a GRB
  40. GRB 170803A: Swift-XRT refined Analysis
  41. GRB 170803A: Enhanced Swift-XRT position
  42. GRB 170803A: Fermi GBM observation
  43. GRB 170803A: Swift detection of a burst with an optical counterpart
  44. Swift Trigger 765783 is not an astrophysical event.
  45. GRB 170728B: time correction to MASTER GCN Circular 21391
  46. Swift J181723.1-164300: Swift detection of another pulse of the new Galactic source
  47. GRB 170728B: Swift/UVOT Further Analysis
  48. Konus-Wind observation of GRB 170728B
  49. GRB 170714A: Chandra observations
  50. GRB 170728B: Optical observations at Crni Vrh
  51. GRB 170728B: BOOTES-2/TELMA optical detection during the extended gamma-ray phase
  52. GRB 170728B: MASTER-IAC first minute short GRB early OT detection
  53. GRB 170728B: Swift/UVOT Upper Limits
  54. GRB 170728B iTelescope observation
  55. GRB 170728A: Swift/UVOT Detection
  56. Swift J181723.1-164300: Swift-BAT refined analysis
  57. GRB 170728B, Swift-BAT refined analysis
  58. GRB 170728B: Fermi GBM detection
  59. GRB 170728A: LCO observations
  60. GRB 170728B: Fermi-LAT detection
  61. GRB 170728A: Swift-XRT refined Analysis
  62. GRB 170728B: Enhanced Swift-XRT position
  63. GRB 170728B: Swift-XRT refined Analysis
  64. GRB 170728B: LT afterglow confirmation
  65. GRB 170728B: Swift detection of a short burst
  66. GRB 170728A: Swift-BAT refined analysis
  67. Swift triggers on a new galactic source: Swift J181723.1-164300
  68. GRB 170728A: Enhanced Swift-XRT position
  69. GRB 170728A: Swift detection of a burst
  70. GRB 170724A, Swift-BAT refined analysis
  71. GRB 170724A: Swift detection of a burst
  72. Trigger 763539 from Swift is probably not astrophysical
  73. GRB 170710B: Further Swift-XRT observations
  74. Correction to GCN Circular 21351: GRB 170714A: Swift/UVOT Observations
  75. GRB 170714A: Swift/UVOT Observations
  76. GRB 170714A, Swift-BAT refined analysis
  77. GRB 170714A: Swift-XRT refined Analysis
  78. GRB 170714A: Enhanced Swift-XRT position
  79. GRB 170714A: Swift detection of a burst
  80. GRB 170702A CALET Gamma-Ray Burst Monitor detection
  81. GRB 170711A: ISON/Terskol and AbAO optical observations
  82. GRB 170711A: Swift-BAT refined analysis
  83. GRB 170711A: Swift/UVOT Upper Limits
  84. GRB 170711A: RATIR Optical and NIR Observations
  85. GRB 170705A: AstroSat CZTI detection
  86. GRB 170711A: Swift-XRT refined Analysis
  87. GRB 170711A: Fermi GBM observation
  88. GRB 170711A: Enhanced Swift-XRT position
  89. GRB 170711A: Prompt enhanced Swift-XRT position
  90. GRB 170711A: Swift detection of a burst
  91. GRB 170705A: TShAO optical observations
  92. GRB 170710B: Fermi GBM observation
  93. GRB 170710B: Swift-XRT and UVOT observations
  94. GRB 170710B: Swift ToO observations
  95. GRB 170710B: Swift detection of a burst
  96. GRB170710A: Swift/UVOT detection
  97. GRB 170710A: Swift-BAT refined analysis
  98. GRB 170710A: Swift-XRT refined Analysis
  99. GRB 170710A: Gemini-S candidate counterpart
  100. GRB 170710A: Enhanced Swift-XRT position

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