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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"

37169 results found.

  1. GRB 081211: Swift detection of a burst
  2. GRB 081210: Swift-XRT refined analysis
  3. GRB081203B: optical observations
  4. GRB 081210: Enhanced Swift-XRT position
  5. GRB 081210: Swift-BAT refined analysis
  6. GRB 081210: Swift detection of a burst with optical afterglow
  7. Konus-Wind observation of GRB 081209
  8. IPN triangulation of short hard GRB 081209
  9. GRB 081203A: optical observations
  10. GRB 081206C: Fermi GBM detection
  11. Radio observation of GRB 081121 with ATCA
  12. Radio observation of GRB 081118 with ATCA
  13. GRB 081206B: Fermi GBM detection
  14. GRB 081206: Fermi GBM detection
  15. GRB 081128: afterglow observations
  16. GRB 081203B: Suzaku WAM observation of the prompt emission
  17. GRB 081203B: Additional Gemini imaging
  18. Radio observation of GRB 081109 with ATCA
  19. Radio observation of GRB 081104 with ATCA
  20. Radio observation of GRB 081029 with ATCA
  21. Radio observation of GRB 081008 with ATCA
  22. GRB081203A: Ashra-1 observation of early optical and VHE-neutrino emission
  23. GRB 081203B: Gemini observations
  24. GRB 081128: optical observation in CrAO
  25. GRB081203A: Optical observations at Ishigaki
  26. GRB 081128: Optical afterglow observations
  27. GRB 081204: GROND Observations
  28. GRB081203B: optical observations
  29. Radio detection of GRB 081203B with the VLA
  30. GRB 081204: Magellan observations
  31. GRB081203A: Radio upper limit at 15 GHz
  32. GRB 081204B: Fermi GBM detection
  33. GRB 081204: Swift/UVOT Upper Limits
  34. GRB 081204: Swift XRT afterglow confirmation
  35. GRB081203A: MITSuME optical observation
  36. GRB 081203A: Optical observations of Xinglong TNT telescope
  37. GRB 081203A: Skynet/GORT Detections
  38. GRB 081204: Swift XRT afterglow candidate
  39. GRB081203A: optical observation
  40. GRB 081204 : a long GRB localized by INTEGRAL
  41. VLA Radio upper limit on GRB 081203A
  42. Swift-XRT observations of GRB 081203B
  43. Konus-Wind observation of GRB 081203A
  44. Konus-Wind observation of GRB 081203B
  45. GRB081203A: Swift-XRT refined analysis
  46. GRB 081203B: optical observations
  47. GRB 081203B: SDSS upper limits at the position of the optical afterglow
  48. Swift/UVOT detection of GRB081203B
  49. GRB 081203B: Swift-XRT candidate afterglow.
  50. GRB 081203A: optical observations
  51. Swift UVOT observations of GRB 081203A
  52. GRB 081203B: Naming correction for burst detected in Swift-BAT slew data
  53. GRB081203A: Swift/UVOT grism redshift
  54. GRB 081203A: Burst detection from Swift-BAT slew data
  55. GRB 081203A: Swift-BAT refined analysis
  56. GRB 081203: Enhanced Swift-XRT position
  57. GRB 081130B: MASTER prompt optical observations
  58. GRB081203: optical observation
  59. GRB 081203: Swift detection of a burst with a bright optical counterpart
  60. GRB 081128: optical observation
  61. GRB 081130B: Fermi GBM detection
  62. GRB 081130: Fermi GBM detection
  63. GRB 081126: afterglow photometry
  64. GRB 081126: Fermi GBM detection
  65. Fermi Gamma-ray Burst Monitor trigger 249166723 reclassification
  66. VLA Radio upper limit on GRB 081126
  67. GRB 081129: Fermi GBM detection
  68. GRB 081130: MASTER VWF prompt optical observations Fermi GRB
  69. GRB 081128A: optical observations
  70. Trigger 335971: Swift possible detection of a burst
  71. GRB081128: Swift/UVOT Upper Limits
  72. SGR 1806-20: Fermi GBM detection.
  73. GRB 081122B: Fermi GBM Detection
  74. GRB 081128: Swift-XRT refined analysis
  75. GRB 081128: Liverpool Telescope afterglow confirmation
  76. GRB081128: optical observations
  77. GRB 081128: Swift-BAT refined analysis
  78. GRB 081128: Enhanced Swift-XRT position
  79. GRB 081128: Optical observation of xinglong TNT
  80. GRB 081128: Swift detection of a burst
  81. GRB 081126: Swift observations continuing
  82. GRB081126: Afterglow photometry from Crni Vrh
  83. GRB 081126: GRT Optical Observation
  84. GRB 081127: Swift/UVOT Upper Limits
  85. GRB 081127: Swift-XRT refined analysis
  86. GRB 081127: Enhanced Swift-XRT position
  87. GRB 081126: Confirmation of the Optical Afterglow
  88. GRB 081127: Swift-BAT refined analysis
  89. Konus-Wind observation of GRB 081126
  90. GRB 081126: Swift-XRT refined analysis
  91. GRB 081127: Swift detection of a burst
  92. GRB 081126: Swift/UVOT Observations
  93. GRB 081126: optical observations
  94. GRB 081126: Swift-BAT refined analysis
  95. GRB 081126: Enhanced Swift-XRT position
  96. GRB 081126: TAROT Calern observatory optical observations
  97. GRB 081126: Swift detection of a burst
  98. GRB 081125: Fermi GBM detection
  99. GRB 081124: Fermi GBM detection
  100. GRB 081120: Fermi GBM detection

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