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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"

19666 results found.

  1. GRB 080430: Swift-XRT refined analysis
  2. GRB 080430: Enhanced Swift-XRT position
  3. GRB 080430 - SDSS Pre-Burst Observations
  4. GRB 080430: Swift detection of a burst with optical afterglow
  5. GRB 080430: TAROT Calern observatory optical observations
  6. GRB 080426: Swift-XRT refined analysis
  7. GRB080426: Swift/UVOT upper limits
  8. GRB 080426: Enhanced Swift-XRT position
  9. GRB 080426, Swift-BAT refined analysis
  10. GRB 080426: Swift detection of a possibly short burst
  11. Possible GRB 080315: XRT non-detection of afterglow
  12. Swift-BAT trigger 309665 is not a GRB
  13. GRB 080420A: ROTSE-III Optical Limits on a possible short burst
  14. GRB 080420?: Swift detection of a possible short burst
  15. GRB 080413A: Suzaku/WAM and Swift/BAT joint spectral analysis
  16. Swift XRT and UVOT observations of GRB080414
  17. GRB 080319B: Jet Break, Energetics, Supernova
  18. GRB 080413A: Suzaku WAM observation of the prompt emission
  19. GRB 080413B: Suzaku WAM observation of the prompt emission
  20. GRB 080413B: Ep,i-Eiso correlation
  21. GRB080413B
  22. Swift-BAT spectral lag analysis of GRB 080413B
  23. GRB 080413B: Swift XRT refined analysis
  24. GRB080413A: Swift/UVOT observations
  25. GRB 080413B, Swift-BAT refined analysis
  26. GRB 080413A: Swift-XRT refined analysis
  27. GRB 080413A, Swift-BAT refined analysis
  28. GRB 080413B: GROND detection of afterglow in all bands
  29. GRB 080413B: Swift detection of a possibly short burst with optical counterpart
  30. GRB 080413: Enhanced Swift-XRT position
  31. GRB 080413: TAROT Calern observatory optical observations
  32. GRB 080413: Swift detection of a burst with an optical afterglow
  33. GRB 080413: ROTSE-III Detection of Optical Counterpart
  34. GRB 080411: Swift/UVOT refined analysis
  35. GRB 080411, Swift-BAT refined analysis
  36. GRB 080411: Swift-XRT Refined Analysis
  37. Konus-Wind observation of GRB 080411
  38. GRB 080411: Enhanced Swift-XRT position
  39. GRB 080411: Swift detection of a bright burst
  40. GRB 080330: Swift-XRT refined position retraction
  41. GRB 080409: Swift-BAT refined analysis
  42. Swift/UVOT observations of GRB080409
  43. GRB 080409: Swift XRT refined analysis
  44. UVOT/Swift Observations of GRB080408
  45. GRB 080408: Swift-XRT position of a possible afterglow
  46. GRB 080409: Enhanced Swift-XRT position
  47. GRB 080409: Swift detection of a burst
  48. GRB 080319A: Early RAPTOR optical limits
  49. GRB 080330: RAPTOR detection of prompt optical flash
  50. GRB 080319B: Potential Jet Break Observed by Swift-XRT and UVOT
  51. GRB 080405: Swift-BAT refined analysis
  52. GRB 080405: Swift-XRT position
  53. GRB 080405: Mars Oddysey and Swift-BAT detection, possible host galaxy
  54. GRB 080325: optical upper limit
  55. GRB080330: Improved Swift XRT Position
  56. GRB080328, RIMOTS optical upper limit
  57. GRB080330: Swift XRT refined analysis
  58. GRB 080330 Swift-UVOT refined analysis
  59. GRB 080328: Suzaku WAM observation of the prompt emission
  60. GRB 080330, Swift-BAT refined analysis
  61. Konus-Wind observation of GRB 080328
  62. GRB 080330: GROND Observations
  63. GRB 080330: TAROT Calern observatory optical observations
  64. GRB 080330: error in reported XRT position
  65. GRB080330 - SDSS Pre-Burst Observations
  66. GRB 080330: Liverpool Telescope Optical observations
  67. GRB 080330A: ROTSE-III Detection of Optical Counterpart
  68. GRB 080330: Swift detection of a burst with an optical counterpart
  69. GRB 080330: TAROT Calern observatory optical detection
  70. GRB 080328: BTA optical imaging and spectroscopy
  71. GRB 080328, Swift-BAT refined analysis
  72. GRB 080328: Swift XRT refined analysis
  73. GRB 080325, Swift-BAT refined analysis
  74. Swift/UVOT observations of GRB080328
  75. GRB 080328: Enhanced Swift-XRT position
  76. GRB080328: Faulkes Telescope North observations
  77. GRB 080328: Swift detection of a burst with an optical counterpart
  78. GRB 080325: Subaru detection of NIR afterglow candidate
  79. GRB080325: XRT Refined Analysis
  80. GRB 080325: GROND Observations
  81. GRB 080325: Swift/UVOT Upper Limits
  82. GRB 080319D: GROND Detection of the Optical Counterpart
  83. GRB 080325: Enhanced Swift-XRT position
  84. GRB 080325: Swift detection of a burst
  85. GRB 080319B : Apparent spectral evolution in very early Swift/XRT WT mode data: intrinsic or pile-up effect?
  86. GRB 080319C: Suzaku WAM observation of the prompt emission
  87. GRB 080320, Swift-BAT refined analysis
  88. GRB 080319D: GROND Observations
  89. GRB 080319D, Swift-BAT refined analysis
  90. GRB 080319C: UVOT Observations
  91. GRB 080319B: UVOT Observations
  92. GRB 080319A: UVOT Observations
  93. GRB 080320: Swift XRT refined analysis
  94. GRB 080320: Early Super-LOTIS Observations
  95. GRB 080319D: Swift XRT refined analysis
  96. Konus-Wind observation of GRB 080319C
  97. GRB 080319C, Swift-BAT refined analysis
  98. Konus-Wind observation of GRB 080319B
  99. GRB 080320: Enhanced Swift-XRT position
  100. GRB 080319C: Early RAPTOR Observations

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