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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.

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subject:"Swift"
body:"GRB"
submitter:"Judith Racusin"

26681 results found.

  1. GRB 091112: Fermi GBM observation
  2. GRB 091031: Fermi LAT detection of a faint burst
  3. GRB 091111: BOOTES-3 contemporaneous imaging
  4. GRB 091111: BOOTES-3 observations
  5. GRB 091109A: GROND and VLT observations
  6. GRB 091109B: Swift/UVOT Upper Limits
  7. GRB 091109B: Swift-XRT Team refined analysis
  8. GRB 091109B: Enhanced Swift-XRT position
  9. GRB 091109B: Optical limits from Watcher
  10. GRB 091109B: ROTSE-III Optical Limits
  11. GRB 091109B: Swift detection of a short burst
  12. GRB091109: Correction to GCN 10139
  13. GRB 091030: Fermi GBM detection
  14. GRB 091109: Swift-XRT refined analysis
  15. GRB 091109: BOOTES-3 observations
  16. GRB 091109: Swift/UVOT observations
  17. GRB 091109: Faulkes Telescope South observations
  18. GRB 091109: Enhanced Swift-XRT position
  19. GRB091109: REM detection of the NIR afterglow
  20. GRB 091109: Swift detection of a burst with optical afterglow
  21. GRB 091029: Observations from Stardome Observatory
  22. GRB 091104: Swift-BAT refined analysis
  23. GRB 091104: Swift XRT Refined Analysis
  24. GRB 091104: Swift/UVOT Upper Limits
  25. GRB091102 : MOA optical upper limit
  26. GRB 091104: Enhanced Swift-XRT position
  27. GRB 091104: Swift detection of a burst
  28. GRB 091102: LABOCA/APEX submm observations
  29. Fermi LAT Upper Limits on GRB 091010
  30. GRB 091102 : Faulkes Telescope South Upper Limits
  31. GRB 091102A: Fermi GBM observation
  32. GRB 091102: Swift-XRT refined analysis
  33. GRB 091102: Swift/UVOT Upper Limits
  34. GRB 091102: GROND Upper Limits
  35. GRB 091102: BOOTES-3 observations
  36. GRB 091102: Swift-BAT refined analysis
  37. GRB 091102: Swift/XRT localization
  38. GRB 091024: optical observations
  39. GRB 091031: Fermi GBM detection
  40. GRB 091024: Fermi LAT upper limits
  41. GRB 091018, SMARTS optical/IR afterglow observations
  42. GRB091029: Swift/UVOT observations
  43. GRB 091029: Swift XRT refined analysis
  44. GRB 091029: Swift-BAT refined analysis
  45. GRB 091029: Enhanced Swift-XRT position
  46. GRB091024 optical observations
  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 091026: GROND Upper Limits
  52. Radio afterglow detection from GRB 091020
  53. GRB 091026: Swift/UVOT Upper Limits
  54. GRB 091026: Swift-XRT refined analysis
  55. GRB 091026: Enhanced Swift-XRT position
  56. Konus-Wind and Konus-RF observations of GRB 091024
  57. GRB 091026: Updated Swift-XRT position
  58. GRB 091026: Swift detection of a Gamma Ray Burst
  59. GRB091024 Swift/UVOT Upper Limits
  60. GRB 091024: TLS Upper Limit
  61. GRB 091020: Early TLS Multicolor detections, red afterglow
  62. GRB 091024: Super-LOTIS early observations
  63. GRB 091024: Swift-BAT refined analysis
  64. GRB 091024: Fermi GBM Observations
  65. GRB 091024: Swift-XRT team refined analysis
  66. GRB 091024 : Faulkes Telescope North - Afterglow Confirmation
  67. GRB 091024: GRAS004 optical observations
  68. GRB 091024: Faulkes Telescope North Afterglow Candidate
  69. Konus-Wind observations of GRB 091010
  70. GRB 091020: Swift-XRT refined analysis
  71. GRB 091018: Swift XRT refined analysis
  72. GRB091020 Swift/UVOT observations
  73. GRB 091020, Swift-BAT refined analysis
  74. GRB 091020: Enhanced Swift-XRT position
  75. GRB 090926A: Late-time Gemini South Observations and Possible Jet Break
  76. GRB 091020: Swift detection of a burst with an optical afterglow
  77. GRB 091018: miniTAO/ANIR Observations
  78. GRB 091018: Skynet/PROMPT Observations of Fading
  79. Konus-RF observation of GRB 091018
  80. GRB 091018 : Faulkes Telescope South Observations
  81. GRB091018: Swift/UVOT observations
  82. GRB 091018: Enhanced Swift-XRT position
  83. GRB 091018: Swift detection of a burst with optical afterglow
  84. GRB 091003: Gemini-N redshift of possible host galaxy
  85. GRB 091010: optical obsevation
  86. GRB 091010: optical afterglow candidate rejection
  87. GRB 091010: Swift-XRT refined analysis
  88. GRB 091010: Suzaku WAM observation of the prompt emission
  89. GRB 091010: AGILE-MCAL measurement and GRID upper limit
  90. Radio observation of GRB090927 with ATCA
  91. Radio observation of GRB090926a with ATCA
  92. Radio observation of GRB080916c with ATCA
  93. GRB 091010: Fermi GBM observation
  94. GRB 091010: Faulkes Telescope North observations
  95. GRB 091010: RXTE detection
  96. Konus-Wind observations of GRB 091010
  97. GRB 091010: Enhanced XRT position
  98. GRB 091010 optical upper limits
  99. Detection of a short GRB 090929A by RT-2 Experiment
  100. RT-2 observation of the bright GRB 090926A

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