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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"

19666 results found.

  1. IPN Triangulation of GRB 170816A (short/hard)
  2. LIGO/Virgo G297595: Swift-XRT sources
  3. GRB 170810A: VLA Detection
  4. GRB 170813A: Fermi GBM observation
  5. LIGO/Virgo G297595: Swift/BAT data search
  6. GRB 170813A: Swift/UVOT Upper Limits
  7. GRB 170813A: Swift-BAT refined analysis
  8. GRB 170813A: RATIR Optical and NIR Observations
  9. GRB 170810A: AbAO optical upper limit
  10. GRB 170813A: Swift-XRT refined Analysis
  11. GRB 170813A: Enhanced Swift-XRT position
  12. GRB 170813A: Swift detection of a burst
  13. GRB 170728B: 15 GHz upper limits from AMI
  14. GRB 170728A: 15 GHz upper limits from AMI
  15. GRB 170714A: 15 GHz upper limits from AMI
  16. GRB 170711A: 15 GHz upper limits from AMI
  17. GRB 170710B: 15 GHz upper limits from AMI
  18. GRB 170626A: 15 GHz upper limits from AMI
  19. GRB 170810A: Swift-BAT refined analysis
  20. GRB 170810A: Swift-XRT refined Analysis
  21. GRB 170810A: Swift/UVOT Detection
  22. GRB 170810A: Fermi GBM observation
  23. GRB 170810A: Fermi-LAT detection
  24. GRB 170810A: Enhanced Swift-XRT position
  25. GRB 170810A: Swift detection of a burst with a bright optical counterpart
  26. LIGO/Virgo G296853: Swift/BAT data search
  27. GRB 170808B: Fermi LAT Detection
  28. IPN Triangulation of GRB 170805A (short)
  29. Konus-Wind observation of GRB 170724A
  30. GRB 170807A: Swift-BAT refined analysis
  31. GRB 170805A: Insight-HXMT detection
  32. GRB 170807A: Swift detection of a burst
  33. GRB 170728B: TShAO, SAO RAS and AbAO optical observations
  34. GRB 170803A: Swift/BAT spectral lag results
  35. GRB 170804A: LCO Observations
  36. GRB 170804A: Swift-BAT refined analysis
  37. GRB 170804A: Swift/UVOT Detection
  38. GRB 170804A: Swift-XRT refined Analysis
  39. GRB 170804A: Enhanced Swift-XRT position
  40. GRB 170803A: Swift-BAT refined analysis
  41. GRB 170803A: Swift/UVOT Detection
  42. GRB 170804A: Swift detection of a burst with optical counterpart
  43. Swift Trigger 766161 is not a GRB
  44. GRB 170803A: Swift-XRT refined Analysis
  45. GRB 170803A: Enhanced Swift-XRT position
  46. GRB 170803A: Fermi GBM observation
  47. GRB 170803A: Swift detection of a burst with an optical counterpart
  48. Swift Trigger 765783 is not an astrophysical event.
  49. GRB 170728B: time correction to MASTER GCN Circular 21391
  50. Swift J181723.1-164300: Swift detection of another pulse of the new Galactic source
  51. GRB 170728B: Swift/UVOT Further Analysis
  52. Konus-Wind observation of GRB 170728B
  53. GRB 170714A: Chandra observations
  54. GRB 170728B: Optical observations at Crni Vrh
  55. GRB 170728B: BOOTES-2/TELMA optical detection during the extended gamma-ray phase
  56. GRB 170728B: MASTER-IAC first minute short GRB early OT detection
  57. GRB 170728B: Swift/UVOT Upper Limits
  58. GRB 170728B iTelescope observation
  59. GRB 170728A: Swift/UVOT Detection
  60. Swift J181723.1-164300: Swift-BAT refined analysis
  61. GRB 170728B, Swift-BAT refined analysis
  62. GRB 170728B: Fermi GBM detection
  63. GRB 170728A: LCO observations
  64. GRB 170728B: Fermi-LAT detection
  65. GRB 170728A: Swift-XRT refined Analysis
  66. GRB 170728B: Enhanced Swift-XRT position
  67. GRB 170728B: Swift-XRT refined Analysis
  68. GRB 170728B: LT afterglow confirmation
  69. GRB 170728B: Swift detection of a short burst
  70. GRB 170728A: Swift-BAT refined analysis
  71. Swift triggers on a new galactic source: Swift J181723.1-164300
  72. GRB 170728A: Enhanced Swift-XRT position
  73. GRB 170728A: Swift detection of a burst
  74. GRB 170724A, Swift-BAT refined analysis
  75. GRB 170724A: Swift detection of a burst
  76. Trigger 763539 from Swift is probably not astrophysical
  77. GRB 170710B: Further Swift-XRT observations
  78. Correction to GCN Circular 21351: GRB 170714A: Swift/UVOT Observations
  79. GRB 170714A: Swift/UVOT Observations
  80. GRB 170714A, Swift-BAT refined analysis
  81. GRB 170714A: Swift-XRT refined Analysis
  82. GRB 170714A: Enhanced Swift-XRT position
  83. GRB 170714A: Swift detection of a burst
  84. GRB 170702A CALET Gamma-Ray Burst Monitor detection
  85. GRB 170711A: ISON/Terskol and AbAO optical observations
  86. GRB 170711A: Swift-BAT refined analysis
  87. GRB 170711A: Swift/UVOT Upper Limits
  88. GRB 170711A: RATIR Optical and NIR Observations
  89. GRB 170705A: AstroSat CZTI detection
  90. GRB 170711A: Swift-XRT refined Analysis
  91. GRB 170711A: Fermi GBM observation
  92. GRB 170711A: Enhanced Swift-XRT position
  93. GRB 170711A: Prompt enhanced Swift-XRT position
  94. GRB 170711A: Swift detection of a burst
  95. GRB 170705A: TShAO optical observations
  96. GRB 170710B: Fermi GBM observation
  97. GRB 170710B: Swift-XRT and UVOT observations
  98. GRB 170710B: Swift ToO observations
  99. GRB 170710B: Swift detection of a burst
  100. GRB170710A: Swift/UVOT detection

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