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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"

27603 results found.

  1. GRB 080325: Swift detection of a burst
  2. GRB 080319C: Suzaku WAM observation of the prompt emission
  3. GRB 080320, Swift-BAT refined analysis
  4. GRB 080319D: GROND Observations
  5. GRB080319B: Time-Independent XRT Spectrum
  6. GRB 080319D, Swift-BAT refined analysis
  7. GRB 080319C: UVOT Observations
  8. GRB 080319B: UVOT Observations
  9. GRB 080319A: UVOT Observations
  10. GRB 080320: Swift XRT refined analysis
  11. GRB 080320: Early Super-LOTIS Observations
  12. GRB 080320: J detection with FLAMINGOS
  13. GRB 080319D: Swift XRT refined analysis
  14. Konus-Wind observation of GRB 080319C
  15. GRB 080319C, Swift-BAT refined analysis
  16. Konus-Wind observation of GRB 080319B
  17. GRB 080319C: Early RAPTOR Observations
  18. GRB 080319C: KAIT OA observations
  19. GRB 080320 - SDSS Pre-Burst Observations
  20. GRB 080320: Swift detection of a burst
  21. GRB 080320: ROTSE-III Optical Limits
  22. GRB 080319B: ROTSE-III Observations of Optical Counterpart
  23. Swift-BAT trigger 306829 is IGR J16479-4514
  24. GRB 080319B: RAPTOR observations of a naked eye burst
  25. GRB 080319A: Swift-XRT Team Refined Analysis
  26. GRB 080319B, Swift-BAT refined analysis
  27. GRB080319B: Prompt PROMPT Detections
  28. GRB 080319C: Swift-XRT Team Refined Analysis
  29. GRB 080319B: Swift-XRT Team Refined Analysis
  30. GRB 080319D: Swift/UVOT Refined Analysis of the Fading Optical Afterglow Candidate
  31. GRB 080319D: MASTER-VWF-Kislovodsk optical observation
  32. GRB 080319C: MASTER-VWF-Kislovodsk optical observation
  33. GRB 080319D: Swift detection of a burst with a possible optical afterglow
  34. GRB 080319A, Swift-BAT refined analysis
  35. GRB 080319C: Early Super-LOTIS Observations
  36. GRB 080319C: Swift detection of a burst with an optical afterglow
  37. GRB 080319C: KAIT OA candidate
  38. GRB 080319B: Change in power law decay index
  39. GRB 080319B: Gemini-South Spectroscopy
  40. GRB080319B Liverpool Telescope optical afterglow candidate
  41. GRB 080319B: Super-LOTIS Detection of a Bright OT
  42. GRB 080319B: KAIT OA
  43. GRB 080319B: Swift detection of an intense burst with a bright optical counterpart
  44. GRB 080319A: Swift detection of a burst
  45. Swift Trigger 306745 is not a GRB
  46. Swift Trigger 306616 is not a GRB
  47. Swift/UVOT observations of GRB 080315
  48. Swift trigger 306323: Swift-BAT/XRT refined analysis
  49. SAX J1818.6-1703: Swift detection (trigger 306379)
  50. GRB 080315: Optical observations
  51. GRB 080315: TAROT Calern observatory optical observations
  52. GRB 080315: Swift detection of a possible burst
  53. GRB 080310: ROTSE-III Observations of Optical Counterpart
  54. GRB080310: Optical observation by MITSuME telescope
  55. GRB 080310: early RAPTOR multicolor observations
  56. GRB 080310, Swift-BAT refined analysis
  57. GRB 080310: Swift-XRT refined analysis
  58. GRB 080310: Swift/UVOT Refined Analysis
  59. GRB 080310 - SDSS Pre-Burst Observations
  60. GRB 080310: VLT/UVES spectroscopy
  61. GRB080310: Super-LOTIS suggestion of brightening
  62. GRB 080310: Swift detection of a burst with optical afterglow
  63. GRB080229, optical upper limit (Correction)
  64. GRB080307, optical upper limit
  65. GRB080229, optical upper limit
  66. GRB 080307: Swift-XRT Team refined analysis
  67. GRB 080307: Swift/UVOT Upper Limits
  68. GRB 080307: Early RAPTOR Limits
  69. GRB 080307, Swift-BAT refined analysis
  70. GRB080307 - SDSS Pre-Burst Observations
  71. GRB 080307, Preliminary Swift-BAT refined analysis
  72. GRB 080307: Swift detection of a burst
  73. GRB 080303: Swift/UVOT follow-up of afterglow detection
  74. GRB 080303, Swift-BAT refined analysis
  75. GRB080303: Swift XRT refined analysis
  76. Swift UVOT observations of GRB080229B
  77. GRB080229B: Swift XRT afterglow observation
  78. GRB 080303A: Faulkes Telescope South optical afterglow observations
  79. GRB 080303: Swift detection of a burst with optical afterglow
  80. GRB 080303A: ROTSE-III Optical Limits
  81. GRB080229: Swift XRT refined analysis
  82. GRB 080229: Deep Gemini/GMOS optical observations
  83. GRB080229: Possible optical afterglow
  84. UVOT analysis for GRB080229
  85. GRB 080229, Swift-BAT refined analysis
  86. GRB 080229: Faulkes Telescope South optical limit
  87. GRB 080229A: ROTSE-III Optical Limits
  88. GRB 080229: Swift detection of a bright burst
  89. Swift-XRT improved positions, and new redshift limits.
  90. GRB 080218B, Swift-BAT refined analysis
  91. GRB 080218B: Swift-XRT refined analysis
  92. Swift/UVOT observations of GRB080218B
  93. GRB 080218B: GROND upper limits
  94. GRB 080218A, Swift-BAT refined analysis
  95. GRB080218B: Watcher prompt limit
  96. GRB 080218B: Swift detection of a burst
  97. GRB 080218: Swift detection of a burst
  98. Swift-XRT and UVOT observations of the IPN burst GRB 080211
  99. Swift/UVOT refined analysis of GRB080212
  100. GRB 080212, Swift-BAT refined analysis

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