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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"

21907 results found.

  1. GRB 080517: Enhanced Swift-XRT position
  2. GRB080517: Liverpool Telescope Optical Observations
  3. GRB 080517: Swift detection of a burst
  4. GRB 080516, GROND 2nd epoch observations
  5. GRB 080516, GROND observations
  6. GRB 080516, SMARTS optical/IR observations
  7. GRB 080516: Enhanced Swift-XRT position
  8. GRB 080516: Swift detection of a burst
  9. Errartum: VLA upper limit on GRB 080507
  10. VLA upper limit on GRB 080705
  11. Konus-Wind observation of GRB 080513
  12. IPN triangulation of bright GRB 080513
  13. GRB 080515, Swift-BAT refined analysis
  14. GRB 080514B: slow fading behaviour ?
  15. GRB 080514B: Swift-XRT analysis
  16. GRB 080514B, GROND observations
  17. GRB 080515: Swift detection of a burst
  18. GRB 080514B: Watcher observations
  19. GRB 080514B: SuperAGILE/IPN GRB Localization
  20. procesure for GRB Circular
  21. Swift detection of a possible galactic transient
  22. GRB080514: REM NIR & Optical Observations
  23. Konus-Wind observation of GRB 080507
  24. GRB 080506: NAYUTA Optical Observation
  25. GRB 080507: Suzaku WAM observation of the prompt emission
  26. GRB 080507: Keck photometry
  27. GRB 080503: Chandra Observation of X-ray Rebrightening or Flattening
  28. GRB 080507: Optical Afterglow
  29. GRB 080506:Optical observations from HCT
  30. GRB 080506: VLA radio upper limit
  31. GRB080506: Swift/UVOT observations
  32. GRB080503, RIMOTS optical upper limit
  33. GRB 080506: Observations from NOT
  34. GRB 080506: TLS afterglow detection in VRIZ
  35. GRB 080506: Enhanced Swift-XRT position
  36. GRB 080506: Swift detection of a burst with optical afterglow
  37. GRB 080503: VLA radio upper limit
  38. GRB 080503: Observations from NOT
  39. GRB 080503: Slow-rise optical AG ?
  40. GRB 080430: TLS imaging one day after the GRB
  41. GRB080503: Swift/UVOT Upper Limits
  42. GRB 080430
  43. GRB 080503: Enhanced Swift-XRT position
  44. GRB 080503: New candidate afterglow/host in Gemini imaging
  45. GRB 080503: Swift detection of a short burst
  46. GRB080430: Swift/UVOT observations
  47. VLA radio upper limit on GRB 080430
  48. GRB 080430: Swift-XRT refined analysis
  49. GRB 080430: Enhanced Swift-XRT position
  50. GRB 080430 - SDSS Pre-Burst Observations
  51. GRB 080430: Swift detection of a burst with optical afterglow
  52. GRB 080430: TAROT Calern observatory optical observations
  53. GRB080426: Swift/UVOT upper limits
  54. GRB 080426: Enhanced Swift-XRT position
  55. GRB 080426: Swift detection of a possibly short burst
  56. GRB 080320 : Faulkes Telescope North Observations
  57. GRB 080319A : Liverpool and Faulkes Telescopes Observations
  58. GRB 080420A: ROTSE-III Optical Limits on a possible short burst
  59. GRB080310, BVRcIc field calibration
  60. Swift XRT and UVOT observations of GRB080414
  61. GRB 080319B: Jet Break, Energetics, Supernova
  62. GRB 080413B: Faulkes Telescope South optical afterglow observations
  63. GRB 080413A: Liverpool Telescope and Faulkes Telescope South optical observations
  64. GRB 080413A: Suzaku WAM observation of the prompt emission
  65. GRB 080413B: Suzaku WAM observation of the prompt emission
  66. GRB 080413A: MOA-II optical afterglow observations
  67. GRB 080414: RTT150 optical observations
  68. VLA radio observations of GRB 080413B
  69. GRB 080413B: Gemini-South Spectroscopy
  70. VLA radio observations of GRB 080413A
  71. GRB080413B
  72. GRB 080413a, SMARTS optical/IR afterglow observations
  73. GRB080413A: Swift/UVOT observations
  74. GRB080413B: REM NIR & Optical Observation
  75. GRB 080413B: GROND detection of afterglow in all bands
  76. GRB 080413B: Swift detection of a possibly short burst with optical counterpart
  77. GRB 080413A: REM detection of the NIR Afterglow
  78. GRB 080413: Enhanced Swift-XRT position
  79. GRB 080413: TAROT Calern observatory optical observations
  80. GRB 080413: Swift detection of a burst with an optical afterglow
  81. GRB 080411: Swift/UVOT refined analysis
  82. GRB 080411, Swift-BAT refined analysis
  83. GRB 080411: Swift-XRT Refined Analysis
  84. Konus-Wind observation of GRB 080411
  85. GRB 080411: Enhanced Swift-XRT position
  86. GRB 080411: GROND detection of optical afterglow candidate
  87. GRB 080411: Swift detection of a bright burst
  88. GRB 080408: GROND detection of optical/NIR afterglow candidate
  89. GRB 080330 optical observations
  90. Swift/UVOT observations of GRB080409
  91. GRB 080409: Swift XRT refined analysis
  92. GRB 080409: Enhanced Swift-XRT position
  93. GRB 080409: REM optical/NIR observations
  94. GRB 080409: Swift detection of a burst
  95. GRB 080319A: Early RAPTOR optical limits
  96. GRB 080319B: HST observations
  97. GRB 080330: RAPTOR detection of prompt optical flash
  98. GRB 080405: Swift-BAT refined analysis
  99. GRB 080405: Swift-XRT position
  100. GRB 080405: Mars Oddysey and Swift-BAT detection, possible host galaxy

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