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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"

19609 results found.

  1. GRB 080330 Swift-UVOT refined analysis
  2. GRB 080328: Suzaku WAM observation of the prompt emission
  3. GRB 080330, Swift-BAT refined analysis
  4. Konus-Wind observation of GRB 080328
  5. GRB 080330: GROND Observations
  6. GRB 080330: TAROT Calern observatory optical observations
  7. GRB 080330: error in reported XRT position
  8. GRB080330 - SDSS Pre-Burst Observations
  9. GRB 080330: Liverpool Telescope Optical observations
  10. GRB 080330A: ROTSE-III Detection of Optical Counterpart
  11. GRB 080330: Swift detection of a burst with an optical counterpart
  12. GRB 080330: TAROT Calern observatory optical detection
  13. GRB 080328: BTA optical imaging and spectroscopy
  14. GRB 080328, Swift-BAT refined analysis
  15. GRB 080328: Swift XRT refined analysis
  16. GRB 080325, Swift-BAT refined analysis
  17. Swift/UVOT observations of GRB080328
  18. GRB 080328: Enhanced Swift-XRT position
  19. GRB080328: Faulkes Telescope North observations
  20. GRB 080328: Swift detection of a burst with an optical counterpart
  21. GRB 080325: Subaru detection of NIR afterglow candidate
  22. GRB080325: XRT Refined Analysis
  23. GRB 080325: GROND Observations
  24. GRB 080325: Swift/UVOT Upper Limits
  25. GRB 080319D: GROND Detection of the Optical Counterpart
  26. GRB 080325: Enhanced Swift-XRT position
  27. GRB 080325: Swift detection of a burst
  28. GRB 080319B : Apparent spectral evolution in very early Swift/XRT WT mode data: intrinsic or pile-up effect?
  29. GRB 080319C: Suzaku WAM observation of the prompt emission
  30. GRB 080320, Swift-BAT refined analysis
  31. GRB 080319D: GROND Observations
  32. GRB 080319D, Swift-BAT refined analysis
  33. GRB 080319C: UVOT Observations
  34. GRB 080319B: UVOT Observations
  35. GRB 080319A: UVOT Observations
  36. GRB 080320: Swift XRT refined analysis
  37. GRB 080320: Early Super-LOTIS Observations
  38. GRB 080319D: Swift XRT refined analysis
  39. Konus-Wind observation of GRB 080319C
  40. GRB 080319C, Swift-BAT refined analysis
  41. Konus-Wind observation of GRB 080319B
  42. GRB 080320: Enhanced Swift-XRT position
  43. GRB 080319C: Early RAPTOR Observations
  44. GRB 080319B: second epoch imaging from Canarias (correction to GCN7469)
  45. GRB 080320 - SDSS Pre-Burst Observations
  46. GRB 080320: Swift detection of a burst
  47. GRB 080320: ROTSE-III Optical Limits
  48. GRB 080319B: ROTSE-III Observations of Optical Counterpart
  49. GRB 080319B: optical observations
  50. Swift-BAT trigger 306829 is IGR J16479-4514
  51. GRB 080319B: RAPTOR observations of a naked eye burst
  52. GRB 080319A: Swift-XRT Team Refined Analysis
  53. GRB 080319B, Swift-BAT refined analysis
  54. GRB 080319C: Swift-XRT Team Refined Analysis
  55. GRB 080319B: Swift-XRT Team Refined Analysis
  56. GRB 080319D: Swift/UVOT Refined Analysis of the Fading Optical Afterglow Candidate
  57. GRB 080319C: AGILE-MCAL observation of the prompt emission
  58. GRB 080319D: MASTER-VWF-Kislovodsk optical observation
  59. GRB 080319C: MASTER-VWF-Kislovodsk optical observation
  60. GRB 080319D: Swift detection of a burst with a possible optical afterglow
  61. GRB 080319B: TORTORA synchronous observation
  62. GRB 080319A/B/C: INTEGRAL SPI-ACS light curves available
  63. GRB 080319B: Enhanced Swift-XRT position
  64. GRB 080319A: Enhanced Swift-XRT position
  65. GRB 080319A, Swift-BAT refined analysis
  66. GRB 080319C: Early Super-LOTIS Observations
  67. GRB 080319C: Swift detection of a burst with an optical afterglow
  68. GRB 080319C: KAIT OA candidate
  69. GRB 080319b prompt optical observation by Pi-of-the-Sky
  70. GRB 080319B: Gemini-South Spectroscopy
  71. GRB080319B Liverpool Telescope optical afterglow candidate
  72. GRB 080319B: Super-LOTIS Detection of a Bright OT
  73. GRB 080319B: KAIT OA
  74. GRB 080319B: UVOT Position
  75. GRB 080319B: Swift detection of an intense burst with a bright optical counterpart
  76. GRB 080319A: Swift detection of a burst
  77. Swift Trigger 306745 is not a GRB
  78. Swift Trigger 306616 is not a GRB
  79. Swift/UVOT observations of GRB 080315
  80. Swift trigger 306323: Swift-BAT/XRT refined analysis
  81. SAX J1818.6-1703: Swift detection (trigger 306379)
  82. GRB 080315: TAROT Calern observatory optical observations
  83. GRB 080315: Swift detection of a possible burst
  84. GRB 080310: ROTSE-III Observations of Optical Counterpart
  85. GRB 080310, Swift-BAT refined analysis
  86. GRB 080310: Swift-XRT refined analysis
  87. GRB 080310: Swift/UVOT Refined Analysis
  88. GRB 080310 - SDSS Pre-Burst Observations
  89. GRB 080310: Enhanced Swift-XRT position
  90. GRB 080310: VLT/UVES spectroscopy
  91. GRB080310: Super-LOTIS suggestion of brightening
  92. GRB 080310: Swift detection of a burst with optical afterglow
  93. GRB080229, optical upper limit (Correction)
  94. GRB080307, optical upper limit
  95. GRB080229, optical upper limit
  96. GRB 080307: Swift-XRT Team refined analysis
  97. GRB 080307: Swift/UVOT Upper Limits
  98. GRB 080307: Early RAPTOR Limits
  99. GRB 080307, Swift-BAT refined analysis
  100. GRB080307 - SDSS Pre-Burst Observations

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