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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"

29079 results found.

  1. GRB051109B: XRT position
  2. GRB 051109B: Super-LOTIS Observations
  3. GRB 051109B Kiso optical follow-up observation
  4. GRB 051109B: Swift detection of a burst
  5. GRB 051109: HET Optical Spectrum and Absorption Redshift
  6. GRB051109: Early Super-LOTIS Detection
  7. GRB 051109: Swift-BAT refined analysis
  8. GRB 051109A: ROTSE-III Decline rate for Optical Counterpart
  9. GRB051109: Swift detection of a burst
  10. GRB 051109a: IR Detections
  11. GRB 051109: ROTSE-III Detection of Possible Counterpart
  12. GRB051105B: Swift/XRT upper limit
  13. GRB051105B: Swift/UVOT upper limit
  14. GRB051103: optical observations
  15. GRB051028: Swift-XRT refined analysis
  16. GRB051105A: Swift/UVOT Observations
  17. XRT observations of GRB 051105A
  18. GRB 051105b: ART optical limits
  19. GRB 051105B (INTEGRAL 2701): Optical observation
  20. GRB 051105: Swift-BAT refined analysis
  21. GRB 051105: Swift detection of a short burst
  22. Konus-Wind observation of GRB 051028
  23. GRB051028 SARA Observation
  24. GRB051028: optical observations
  25. GRB051028: Swift/UVOT upper limits
  26. GRB051028: WHT optical candidate
  27. GRB051028: Swift XRT Position
  28. GRB051021B: Swift/UVOT Upper limits
  29. GRB 051021, Optical Observations
  30. GRB051012: Swift-XRT analysis
  31. GRB051021B: Swift XRT refined analysis
  32. GRB 051022: Swift/UVOT Upper Limits
  33. Konus-Wind observation of GRB 051022
  34. GRB051022: Swift XRT Position
  35. GRB 051022 (=H3950): SXC Flight Localization is Valid
  36. GRB051021: Swift/UVOT Upper Limits
  37. GRB 051021B: Refined analysis of the Swift-BAT burst
  38. GRB051022,optical observation
  39. GRB 051022A: ROTSE-III Optical Limits
  40. GRB 051022: Optical observations
  41. GRB 051021,optical observation
  42. GRB051021B: Swift XRT Position
  43. GRB 051021B: Swift detection of a burst
  44. GRB051021: Swift XRT analysis
  45. GRB051021 (=H3947): Refined Analysis
  46. GRB 051021: ROTSE-III Confirmation of Optical Counterpart
  47. Swift-BAT trigger 160640 is not a real GRB
  48. GRB051021: A GRB Localized by HETE
  49. Swift-BAT trigger 160619 is not a GRB
  50. Swift-BAT triggered on a posible CR Shower or possible GRB
  51. GRB 051016b: Optical limit
  52. GRB 051016A: Swift/UVOT upper limits
  53. GRB 051016B: Swift/UVOT detection
  54. GRB 051016B: Refined analysis of the Swift-BAT burst
  55. GRB 051016B: Swift detection of a soft burst
  56. GRB 051016: Swift-BAT refined analysis
  57. GRB051016: Swift detection of a burst
  58. GRB 051012: Swift-BAT detection of burst yesterday
  59. Swift trigger 159578 is not a burst
  60. Swift-BAT Trigger 159578 is a possible burst
  61. GRB050805A: Rc optical observations
  62. GRB 051006: Swift/UVOT Upper Limits
  63. GRB051008: Swift XRT refined analysis
  64. GRB051008 - Swift UVOT upper limits
  65. Konus-Wind observation of GRB 051008
  66. GRB051008: Final refined analysis of the Swift-BAT burst
  67. GRB051008: Refined analysis of the Swift-BAT burst
  68. GRB 051008: Swift XRT position
  69. GRB 051008: early Swift XRT analysis
  70. GRB 051008: Swift UVOT Candidate
  71. GRB051008: Swift-BAT detection of a bright burst
  72. GRB 051006: XRT refined analysis
  73. Swift-BAT trigger 158700 is a probable Cosmic Ray Shower Event
  74. GRB051006: Refined analysis of the Swift-BAT burst
  75. GRB 051006: XRT position
  76. GRB051006: Swift detection of a burst
  77. GRB051001: Swift UVOT Upper Limits
  78. GRB 051001: Swift XRT refined analysis
  79. GRB 051001: I-band limit
  80. GRB 051001: AAT infra-red observations
  81. GRB 051001: Swift-BAT refined analysis
  82. GRB 051001: Swift Detection of a Burst
  83. GRB 051001: ROTSE-III Optical Limits
  84. GRB050922C: UVES/VLT high resolution spectroscopy
  85. GRB050925: Swift/XRT limits
  86. GRB050922C - Swift UVOT preliminary analysis
  87. GRB050925: Swift UVOT upper limits
  88. Refined analysis of the Swift-BAT soft short burst
  89. GRB050925: Faulkes Telescope North R-band limit
  90. GRB050925: Swift-BAT detection of a short burst
  91. GRB050922C: TNG spectroscopic observations
  92. GRB050922B: refined XRT analysis
  93. Konus-Wind observation of GRB 050922C
  94. GRB050922B: Swift UVOT early upper limits.
  95. GRB OT observation
  96. GRB050922C: observation at MonteBoo
  97. GRB 050922B: optical limit
  98. GRB 050922C: Swift XRT refined analysis
  99. HETE Fregate observations of GRB 050922C
  100. GRB 050922C: Swift-BAT refined analysis

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