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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"

27481 results found.

  1. GRB 091102A: Suzaku WAM observation of the prompt emission
  2. GRB 091109B: Suzaku WAM observation of the prompt emission
  3. GRB091111: Swift XRT refined analysis
  4. Konus-Wind and Konus-RF observations of GRB 091031
  5. GRB 091112: Swift-BAT refined analysis
  6. GRB 091112: Fermi GBM observation
  7. GRB 091031: Fermi LAT detection of a faint burst
  8. GRB 091112: Swift detection of a possible burst
  9. GRB 091109B: Swift/UVOT Upper Limits
  10. GRB 091109B: Swift-XRT Team refined analysis
  11. GRB 091109B: Swift-BAT refined analysis
  12. GRB 091109B: ROTSE-III Optical Limits
  13. GRB 091109B: Swift detection of a short burst
  14. GRB 091030: Fermi GBM detection
  15. GRB 091109: Swift-XRT refined analysis
  16. GRB 091109: Swift/UVOT observations
  17. GRB 091109: Swift-BAT refined analysis
  18. GRB 091109: Swift detection of a burst with optical afterglow
  19. GRB 091029: Observations from Stardome Observatory
  20. GRB 091104: Swift-BAT refined analysis
  21. GRB 091104: Swift XRT Refined Analysis
  22. GRB 091104: Swift/UVOT Upper Limits
  23. GRB 091104: Swift detection of a burst
  24. GRB 091102: LABOCA/APEX submm observations
  25. Fermi LAT Upper Limits on GRB 091010
  26. GRB 091102A: Fermi GBM observation
  27. GRB 091102: Swift-XRT refined analysis
  28. GRB 091102: Swift/UVOT Upper Limits
  29. GRB 091102: GROND Upper Limits
  30. GRB 091102: BOOTES-3 observations
  31. GRB 091102: Swift-BAT refined analysis
  32. GRB 091102: Swift/XRT localization
  33. GRB 091102: ROTSE-III Optical Limits
  34. GRB 091102: Swift/UVOT Finding Chart Observation
  35. GRB 091102: Swift detection of a burst
  36. GRB 091031: Fermi GBM detection
  37. GRB 091024: Fermi LAT upper limits
  38. GRB 091018: Skynet/PROMPT Observations of Possible Host Galaxy
  39. GRB 090920: Skynet/DSO Detection
  40. GRB091029: Swift/UVOT observations
  41. GRB 091029: Skynet/PROMPT Continued Observations of Fading
  42. GRB 091029: Swift XRT refined analysis
  43. Fermi Gamma-ray Burst Monitor trigger 091028818 is not a GRB
  44. GRB 091029: Swift-BAT refined analysis
  45. GRB 091029: Gemini-South Redshift
  46. GRB 091029: Skynet/PROMPT Observations of Peak and Fading
  47. GRB 091029: GROND Detection of the Optical/NIR Afterglow
  48. GRB 091029: Swift detection of a burst with an optical counterpart
  49. GRB 091020: Fermi GBM observation
  50. GRB 091026: Suzaku WAM observation of the prompt emission
  51. GRB 091024: YNAO-GMG observations
  52. GRB 091026: GROND Upper Limits
  53. GRB 091026: Swift-BAT refined analysis
  54. GRB 091026: Swift/UVOT Upper Limits
  55. GRB 091024: Burst was outside the Swift-BAT FOV after T0(BAT)+460sec
  56. GRB 091026: Swift-XRT refined analysis
  57. Konus-Wind and Konus-RF observations of GRB 091024
  58. GRB 091026: Swift detection of a Gamma Ray Burst
  59. GRB 091020 : Xinglong TNT upper limit
  60. Swift-BAT Triggers 373776-373778 are not real
  61. GRB091024 Swift/UVOT Upper Limits
  62. GRB 091024: KAIT optical afterglow observations
  63. GRB 091024: Super-LOTIS early observations
  64. GRB091024: VRcIc Afterglow Observations
  65. GRB 091024: Swift-BAT refined analysis
  66. Swift-BAT Triggers 373679-373684 are not real
  67. GRB 091024: Fermi GBM Observations
  68. GRB 091024: Swift-XRT team refined analysis
  69. Swift-BAT trigger 373691 is a galactic bulge transient
  70. GRB 091024: Xinglong TNT optical observation
  71. GRB 091024 : Faulkes Telescope North - Afterglow Confirmation
  72. GRB 091024: Faulkes Telescope North Afterglow Candidate
  73. GRB 091024: Swift detection of a burst
  74. GRB 091018: Skynet/PROMPT Continued Observations of Fading
  75. GRB 091020: Swift-XRT refined analysis
  76. GRB 091018: Swift XRT refined analysis
  77. GRB091020 Swift/UVOT observations
  78. GRB 091020, Swift-BAT refined analysis
  79. GRB 090926A: Late-time Gemini South Observations and Possible Jet Break
  80. GRB 091020: Swift detection of a burst with an optical afterglow
  81. GRB 091018: Skynet/PROMPT Observations of Fading
  82. Konus-RF observation of GRB 091018
  83. GRB 091018 : Faulkes Telescope South Observations
  84. GRB091018: Swift/UVOT observations
  85. GRB 091018: Swift-BAT refined analysis
  86. GRB091018: Magellan Echellette Observations
  87. GRB 091018: ROTSE-III Detection of Optical Counterpart
  88. GRB 091015: Skynet/PROMPT Observations
  89. GRB 091018: Swift detection of a burst with optical afterglow
  90. GRB 090815: a faint long GRB localized by INTEGRAL
  91. GRB 091010: Suzaku WAM observation of the prompt emission
  92. GRB 091010: Fermi GBM observation
  93. GRB 090531A: Skynet/PROMPT Observations
  94. GRB 090530A: Skynet/DSO Detections
  95. GRB 091010: RXTE detection
  96. GRB 091010 optical upper limits
  97. Detection of a short GRB 090929A by RT-2 Experiment
  98. RT-2 observation of the bright GRB 090926A
  99. GRB 091010: Swift-XRT position
  100. SuperAGILE GRB is 091010 and not 090910

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