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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"

12383 results found.

  1. GRB 100131A: MASTER-Net optical alert observations
  2. GRB 100206A: Fermi GBM observation
  3. GRB 100130B: Fermi GBM detection
  4. GRB 100113A: Fermi GBM detection
  5. GRB 100131A: Suzaku WAM observation of the prompt emission
  6. GRB 100131A: Fermi GBM detection
  7. GRB 100122A: Fermi GBM detection
  8. GRB 100122A: MASTER-Net optical observations
  9. GRB 100116A: Suzaku WAM observation of the prompt emission
  10. Konus-Wind observation of GRB 100116A
  11. GRB 100117A: Fermi GBM detection
  12. GRB 100116A: Fermi LAT detection
  13. GRB 100116A: Fermi GBM detection
  14. GRB 100111A: Fermi GBM observation
  15. GRB 091221: Fermi GBM Observation
  16. GRB 091208B: optical observations
  17. GRB 091208B: Fermi GBM observation
  18. GRB 091123: Suzaku WAM observation of the prompt emission
  19. GRB 091126A: Suzaku WAM observation of the prompt emission
  20. Konus-Wind observation of very long GRB 091123
  21. GRB 091123: Fermi GBM detection of a very long burst
  22. GRB 091126B: Fermi GBM detection
  23. GRB 091127: Suzaku WAM observation of the prompt emission
  24. GRB 091126: Fermi GBM detection
  25. GRB 091128: Fermi GBM detection
  26. GRB 091127: Fermi GBM detection
  27. IPN Triangulation of GRB091120
  28. Konus-Wind observation of GRB 091120
  29. GRB 091120: MAXI GSC detection
  30. GRB 091120: Fermi GBM observation
  31. GRB 091112: Suzaku WAM observation of the prompt emission
  32. GRB 091102A: Suzaku WAM observation of the prompt emission
  33. Konus-Wind and Konus-RF observations of GRB 091031
  34. GRB 091112: Fermi GBM observation
  35. GRB 091031: Fermi LAT detection of a faint burst
  36. GRB 091030: Fermi GBM detection
  37. Fermi LAT Upper Limits on GRB 091010
  38. GRB 091102A: Fermi GBM observation
  39. GRB 091031: Fermi GBM detection
  40. GRB 091024: Fermi LAT upper limits
  41. Fermi Gamma-ray Burst Monitor trigger 091028818 is not a GRB
  42. GRB 091020: Fermi GBM observation
  43. GRB 091024: Burst was outside the Swift-BAT FOV after T0(BAT)+460sec
  44. GRB 091024: Fermi GBM Observations
  45. GRB 090926A: Late-time Gemini South Observations and Possible Jet Break
  46. GRB 091003: Gemini-N redshift of possible host galaxy
  47. GRB 091010: Suzaku WAM observation of the prompt emission
  48. Radio observation of GRB090926a with ATCA
  49. GRB 091010: Fermi GBM observation
  50. Detection of a short GRB 090929A by RT-2 Experiment
  51. RT-2 observation of the bright GRB 090926A
  52. GRB 091003A: Suzaku WAM observation of the prompt emission
  53. GRB 091003: Lick observations and possible SDSS host galaxy
  54. GRB 091003: WHT ACAM observations
  55. Konus-Wind observation of GRB 091003A
  56. GRB 090929A: Suzaku WAM observation of the prompt emission
  57. GRB 091003: Swift-XRT confirmation of fading afterglow
  58. GRB 091003: Swift/UVOT Detection of an Optical Afterglow
  59. GRB 091003: Skynet/DSO Observations
  60. GRB 091003: Swift UVOT Detection of a Candidate UV Afterglow
  61. GRB 091003: Swift XRT analysis
  62. GRB 091003A: Fermi LAT detection
  63. GRB 091003A: Fermi GBM detection
  64. GRB 090929A, Swift-BAT refined analysis
  65. Konus-Wind observation of GRB 090929A
  66. GRB 090927: Fermi GBM observation
  67. GRB 090926A: Fermi LAT and GBM refined analysis
  68. Konus-RF observation of GRB 090929A
  69. GRB 090929A BAT location of the Fermi GBM burst
  70. GRB 090929A: Fermi GBM detection
  71. GRB090926A: Swift-XRT refined analysis
  72. Konus-Wind and Konus-RF observations of GRB 090926A
  73. GRB 090926B: Fermi GBM detection
  74. GRB 090926A: Suzaku WAM observation of the prompt emission
  75. GRB090926A: Swift/UVOT observations
  76. GRB 090926A: Swift/UVOT detection of an optical afterglow
  77. GRB 090926A: Skynet/PROMPT Discovery of the Optical Afterglow
  78. GRB 090926: Fermi LAT detection
  79. GRB 090926: Fermi GBM detection
  80. GRB 090925: Fermi GBM detection
  81. GRB090922A: correction to Fermi location
  82. GRB 090922A: Fermi GBM detection
  83. GRB 090915: SARA detection of afterglow candidate
  84. GRB 090902B: Skynet/PROMPT Observations
  85. GRB 090915 Swift-BAT detection of a burst in ground analysis
  86. GRB 090910: Fermi GBM detection
  87. GRB 090831A: Suzaku WAM observation of the prompt emission
  88. GRB 090902B: Suzaku WAM observation of the prompt emission
  89. GRB 090829A: Suzaku WAM observation of the prompt emission
  90. GRB 090904B: Fermi GBM detection
  91. GRB 090902B: Swift/UVOT refined analysis
  92. GRB090902B: Swift XRT refined analysis
  93. GRB 090902B: Faulkes Telescope North observations
  94. GRB 090902B: GROND NIR Afterglow Observations
  95. GRB 090902B: Gemini-N absorption redshift
  96. GRB 090902B: Fermi LAT and GBM refined analysis.
  97. GRB 090902B: Optical afterglow candidate
  98. GRB090902B: Swift/UVOT observations
  99. GRB 090902B: Swift/XRT Afterglow Candidate
  100. GRB 090902B: Fermi LAT detection

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