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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"

36208 results found.

  1. GRB 080604: Gemini-North spectroscopy
  2. GRB 080604, Swift-BAT refined analysis
  3. GRB 080604: Swift-XRT refined analysis
  4. GRB 080603B: Hobby-Eberly Telescope redshift confirmation
  5. GRB 080603B : Xinglong EST observations
  6. GRB 080603B : Liverpool Telescope Observations
  7. Konus-Wind observation of GRB 080603B
  8. GRB 080603B: Swift-XRT refined analysis
  9. GRB 080603A: Swift-XRT detection of the afterglow
  10. GRB 080430: optical observations
  11. GRB 080603B: Swift/UVOT detection of the afterglow
  12. GRB 080604: Enhanced Swift-XRT position
  13. GRB 080603B, Swift-BAT refined analysis
  14. GRB 080604: Hobby-Eberly Telescope spectroscopy
  15. GRB 080603A: Swift/UVOT detection of the afterglow
  16. GRB080603B: RTT150 optical observations, break in light curves
  17. GRB 080604: Early Super-LOTIS Observations
  18. GRB 080604: Swift detection of a burst with an optical afterglow
  19. GRB 080603B: TAROT Calern observatory confirmation of slow optical decay
  20. GRB 080516: TAROT La Silla observatory optical observations
  21. GRB080603B: NOT redshift
  22. GRB 080603B: BOOTES2/TELMA optical observations
  23. GRB 080603B: TAROT Calern observatory detection of a plateau in the light curve
  24. GRB 080603B: Swift detection of a burst with optical afterglow
  25. GRB 080603B: ROTSE-III Detection of Optical Counterpart
  26. GRB 080603: Gemini-North redshift
  27. GRB 080603: A long GRB detected by INTEGRAL
  28. GRB 080603 OA candidate
  29. Possible GRB080603: Faulkes Telescope North optical afterglow candidate
  30. GRB 080602, Swift-BAT refined analysis
  31. GRB 080602: Swift-XRT refined analysis
  32. Konus-Wind observation of GRB 080602
  33. GRB 080602: NOT R-band upper limit
  34. GRB 080602: Enhanced Swift-XRT position
  35. GRB 080602: Swift detection of a burst
  36. Swift analysis of BAT Slew Survey event (Trigger=009)
  37. GRB 080523: afterglow confirmation and redshift constraints
  38. Reactivation of SGR 1627-41
  39. GRB 080524: Swift XRT and UVOT analysis
  40. GRB 080503: 2nd Epoch Chandra X-ray Observations
  41. GRB 080524: Swift-BAT detection of a burst in ground analysis
  42. GRB 080523: Swift-XRT refined analysis
  43. GRB 080523, Swift-BAT refined analysis
  44. GRB 080520: VLT host detection
  45. GRB 080523: VLT optical observations
  46. Swift/UVOT observations of GRB 080523
  47. GRB 080523: Enhanced Swift-XRT position
  48. GRB 080523: Swift detection of a burst
  49. GRB 080515: NIR magnitude correction
  50. GRB 080515: KPNO 4m NIR afterglow detection
  51. GRB 80516: Swift/UVOT Observations
  52. GRB 080515: Swift-XRT position and analysis
  53. GRB 080520, Swift-BAT refined analysis
  54. GRB 080514B: pseudo-z= 1.8 from prompt emission spectrum
  55. GRB 080514B: UVOT Observations
  56. GRB080520: Swift/UVOT observations
  57. GRB 080520: VLT redshift
  58. GRB 080520, GROND observations
  59. GRB 080520: Enhanced Swift-XRT position
  60. GRB 080520: Swift XRT Refined Analysis
  61. GRB 080520: Swift detection of a burst with optical afterglow
  62. GRB 080514B: Suzaku WAM observation of the prompt emission
  63. Konus-Wind observation of GRB 080514B
  64. GRB 080514B: second epoch Swift XRT data confirms the X-ray afterglow
  65. GRB 080503: Further HST imaging
  66. GRB 080517, Swift-BAT refined analysis
  67. GRB 080516, GROND further analysis
  68. GRB 080517: Swift-XRT refined analysis
  69. GRB 080514B: Further NIR observations
  70. GRB 080517: Enhanced Swift-XRT position
  71. GRB080517: Liverpool Telescope Optical Observations
  72. GRB 080517: Swift detection of a burst
  73. GRB 080516, GROND 2nd epoch observations
  74. GRB 080516, GROND observations
  75. GRB080430: optical observations
  76. GRB 080516, SMARTS optical/IR observations
  77. GRB 080516: Swift-XRT Team refined analysis
  78. GRB 080516, Swift-BAT refined analysis
  79. GRB 080516: Enhanced Swift-XRT position
  80. GRB 080514B: NOT observations
  81. GRB 080516: Swift detection of a burst
  82. Errartum: VLA upper limit on GRB 080507
  83. VLA upper limit on GRB 080705
  84. GRB 080514B : redshift estimation
  85. Konus-Wind observation of GRB 080513
  86. IPN triangulation of bright GRB 080513
  87. GRB 080515, Swift-BAT refined analysis
  88. GRB 080514B: KPNO 4m IR observations
  89. GRB 080514B: slow fading behaviour ?
  90. GRB 080514B: Swift-XRT analysis
  91. GRB 080514B, GROND observations
  92. GRB 080515: Swift detection of a burst
  93. GRB 080514B: Finding chart
  94. GRB 080514B: Afterglow candidate
  95. GRB 080514B: Watcher observations
  96. GRB 080430
  97. GRB 080514B: possible AGILE detection at E>50 MeV
  98. GRB 080514B: SuperAGILE/IPN GRB Localization
  99. procesure for GRB Circular
  100. Swift detection of a possible galactic transient

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