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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"

29147 results found.

  1. GRB 081226: Swift-XRT refined analysis
  2. GRB 081226A: Swift UVOT Upper Limits
  3. GRB 081226A: Swift-BAT refined analysis
  4. GRB 081226: ROTSE-III Optical Limits
  5. GRB 081226: Swift detection of a possible short-hard burst
  6. GRB 081224: Swift-XRT observation
  7. GRB 081224: Fermi GBM Detection & LAT Localization
  8. Konus-Wind observation of GRB 081222
  9. GRB 081223: Fermi GBM detection
  10. GRB 081221: GROND observations
  11. GRB 081222: Fermi GBM observation
  12. Fermi Gamma-ray Burst Monitor trigger 251687595 reclassification
  13. GRB081222: Swift/UVOT further observations
  14. GRB 081204C: Fermi GBM detection
  15. GRB 081222, Swift-BAT refined analysis
  16. GRB 081221, Swift-BAT refined analysis
  17. GRB081222 optical limit by "Pi of the Sky"
  18. Konus-Wind observation of very bright GRB 081215A
  19. GRB 081222: Swift XRT refined analysis
  20. GRB081221: Fermi GBM observation
  21. Swift/UVOT observations of GRB 081221
  22. IPN triangulation of bright GRB 081215A
  23. GRB 081221: Swift-XRT Refined Analysis
  24. GRB081222, optical observation
  25. GRB081222: Swift/UVOT detection of an optical afterglow
  26. GRB 081222: GROND Detection of the Optical/NIR Afterglow
  27. GRB 081222: Swift detection of a burst with a bright optical afterglow
  28. GRB 081221: Swift detection of a burst
  29. GRB 081217: Fermi GBM detection
  30. Modification of Swift/UVOT response to bright GRBs
  31. GRB081215A: Fermi-LAT observations
  32. GRB 081215B: Fermi GBM detection
  33. GRB 081216: Suzaku WAM observation of the prompt emission
  34. GRB 081216 : Fermi GBM observation
  35. GRB 081215A: Fermi GBM detection (correction to event fluence)
  36. GRB 081215A: Fermi GBM detection
  37. IPN localization of short hard GRB 081216
  38. GRB 081118: Zadko observations
  39. Fermi Trig Num 251059717 = SGR 0044+42: MASTER prompt optical observations
  40. GRB 0811215A: MASTER prompt optical observations
  41. GRB 081215A: Andromeda inside Fermi error box: MASTER observations
  42. GRB 0811215A: Andromeda inside Fermi error box: MASTER observations
  43. GRB 081213: Fermi GBM detection
  44. GRB 081207: Fermi GBM detection
  45. GRB 081209: Fermi GBM detection
  46. Fermi Gamma-ray Burst Monitor trigger 250533995 is not a GRB
  47. GRB 081211: Swift-BAT refined analysis
  48. GRB 081211: Swift XRT refined analysis
  49. GRB 081211: Swift/UVOT detection of an optical afterglow
  50. GRB 081210: Swift/UVOT refined analysis
  51. GRB 081211: Swift detection of a burst
  52. GRB 081210: Swift-XRT refined analysis
  53. GRB 081210: Swift-BAT refined analysis
  54. GRB 081210: Swift detection of a burst with optical afterglow
  55. Konus-Wind observation of GRB 081209
  56. IPN triangulation of short hard GRB 081209
  57. GRB 081206C: Fermi GBM detection
  58. GRB 081206B: Fermi GBM detection
  59. GRB 081206: Fermi GBM detection
  60. GRB081203A: Optical observations at Ishigaki
  61. GRB 081204: GROND Observations
  62. GRB 081204B: Fermi GBM detection
  63. GRB 081204: Swift XRT afterglow confirmation
  64. GRB081203A: MITSuME optical observation
  65. GRB 081203A: Skynet/GORT Detections
  66. GRB 081204: Swift XRT afterglow candidate
  67. Konus-Wind observation of GRB 081203A
  68. GRB081203A: Swift-XRT refined analysis
  69. Swift/UVOT detection of GRB081203B
  70. GRB 081203B: Swift-XRT candidate afterglow.
  71. Swift UVOT observations of GRB 081203A
  72. GRB081203A: Swift/UVOT grism redshift
  73. GRB 081203A: Burst detection from Swift-BAT slew data
  74. GRB 081203A: Swift-BAT refined analysis
  75. GRB 081130B: MASTER prompt optical observations
  76. GRB 081203: Swift detection of a burst with a bright optical counterpart
  77. GRB 081130B: Fermi GBM detection
  78. GRB 081130: Fermi GBM detection
  79. Swift Trigger 335971: Swift/UVOT Observations
  80. GRB 081126: Fermi GBM detection
  81. Fermi Gamma-ray Burst Monitor trigger 249166723 reclassification
  82. GRB 081129: Fermi GBM detection
  83. GRB 081130: MASTER VWF prompt optical observations Fermi GRB
  84. Swift Trigger 335971 is probably not a real source
  85. Trigger 335971: Swift possible detection of a burst
  86. GRB081128: Swift/UVOT Upper Limits
  87. SGR 1806-20: Fermi GBM detection.
  88. GRB 081122B: Fermi GBM Detection
  89. GRB 081128: Swift-XRT refined analysis
  90. GRB 081128: Swift-BAT refined analysis
  91. GRB 081128: Swift detection of a burst
  92. GRB 081126: GRT Optical Observation
  93. GRB 081127: Swift/UVOT Upper Limits
  94. GRB 081127: Swift-BAT refined analysis
  95. GRB 081126: Swift-XRT refined analysis
  96. GRB 081127: Swift detection of a burst
  97. GRB 081126: Swift/UVOT Observations
  98. GRB 081126: optical observations
  99. GRB 081126: Swift-BAT refined analysis
  100. GRB 081126: TAROT Calern observatory optical observations

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