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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"

27160 results found.

  1. GRB 070419: Swift detection of a burst
  2. Swift-BAT Trigger 276045 is a Cosmic Ray Shower event
  3. Trigger 276045: Swift detection of a possible burst
  4. GRB 070411: TLS data shows plateau, flares
  5. GRB070412: UKIRT-WFCAM JHK upper limits
  6. GRB070412: Swift UVOT observations
  7. IBAS Alert n.4199: Not a GRB
  8. GRB 070411: Swift/UVOT observations
  9. GRB 070412, Swift-BAT refined analysis
  10. GRB 070412 Liverpool Telescope optical limit
  11. GRB 070412: Swift-XRT refined analysis
  12. GRB 070411: Swift-XRT refined analysis
  13. GRB 070412: IAC80 optical afterglow candidate
  14. GRB 070412: NOT observations
  15. GRB 070411, Swift-BAT refined analysis
  16. GRB 070412: Swift detection of a burst
  17. GRB 070411: IAC80 optical observations
  18. GRB 070411 : Liverpool Telescope Observations
  19. GRB 070411: ROTSE-III Detection of Optical Counterpart
  20. GRB 070411: Tautenburg RRM Afterglow Confirmation
  21. GRB 070411: Swift detection of a burst with optical afterglow
  22. GRB 070406, Swift-BAT refined analysis
  23. GRB070406: Swift UVOT observations
  24. GRB 070406: further analysis of NOT images.
  25. GRB 070406: Swift XRT Team analysis - Possible X-ray counterpart
  26. GRB 070406: SARA upper limit
  27. GRB 070406: Swift detection of a burst
  28. GRB 070402: Suzaku WAM observation of the prompt emission
  29. GRB 070328: Suzaku WAM observation of the prompt emission
  30. UVOT observations of GRB070330
  31. GRB 070330, Swift-BAT refined analysis
  32. GRB 070330: TAROT La Silla observatory optical observations
  33. GRB 070330 - Watcher Observations
  34. GRB 070330: Swift detection of a burst
  35. Konus-Wind observation of GRB 070328
  36. GRB 070328: Swift/UVOT Upper Limits
  37. GRB 070328: Swift/XRT Refined Analysis
  38. GRB 070328, Swift-BAT refined analysis
  39. GRB 070328: Swift detection of a burst
  40. GRB070318: Swift UVOT indicates unusual optical/UV afterglow
  41. GRB 070318: Gemini + Magellan spectra
  42. GRB070318: Swift UVOT continuing observations
  43. GRB070318: Swift-XRT refined analysis
  44. GRB 070318: Swift/UVOT Continued Observations
  45. GRB 070318, Swift-BAT refined analysis
  46. IBAS Alert n. 4176: not a GRB
  47. GRB 070318: Swift detection of a burst with an optical afterglow
  48. IBAS Alert n. 4169: not a GRB
  49. GRB 070311: SARA upper limit
  50. GRB 070311: RAPTOR Detection of Optical Emission
  51. GRB070311: FRAM early follow-up limit
  52. GRB 070311: Swift/UVOT Upper Limits
  53. GRB 070311: Swift-XRT refined analysis
  54. GRB 070311: REM candidate afterglow
  55. GRB 070309: Swift/UVOT Upper Limits
  56. GRB 070306, optical observation
  57. IBAS Alert 4162: Not a GRB
  58. GRB 070306 Swift/UVOT refined analysis
  59. GRB070306: confirmation of near infrared afterglow
  60. GRB 070306: ART-3 early optical and near infrared constraints
  61. GRB 070306, Swift-BAT refined analysis
  62. GRB 070306: XRT Team Refined Analysis
  63. GRB070306 - SDSS Pre-burst Observations
  64. GRB 070306: Swift detection of a burst
  65. GRB070227: Swift-XRT refined analysis
  66. GRB 070227: Swift/UVOT Upper Limits
  67. GRB 070227: TAROT La Silla observatory optical observations
  68. GRB 070227, Swift-BAT refined analysis
  69. GRB070227: possible X-ray afterglow detection
  70. GRB 070227: Swift detection of a burst in ground analysis
  71. IBAS Alert n. 4144: not a GRB
  72. GRB 070224: Swift/UVOT Upper Limits
  73. GRB070224: Magellan Imaging Observations
  74. GRB070224: Gemini Imaging Observations
  75. GRB 070224: SARA upper limit
  76. GRB 070224, Swift-BAT refined analysis
  77. GRB 070224: MASTER-Net refind analysis
  78. GRB 070224: MASTER-VWF-Kislovodsk observations
  79. GRB 070224: Swift detection of a burst
  80. GRB070223: Swift/UVOT refined analysis
  81. GRB 070223, Swift-BAT refined analysis
  82. GRB070223: MASTER-VWF-Kislovodsk observations
  83. GRB 070223: Swift-XRT Refined Analysis
  84. GRB070223 - SDSS Pre-Burst Observations
  85. GRB 070223: Liverpool Telescope Possible Afterglow Candidate
  86. GRB070223: Swift burst
  87. Konus-Wind and Konus-A observations of GRB 070220
  88. GRB 070220 Swift-BAT Refined Analysis
  89. Swift/UVOT refined analysis of GRB070220
  90. GRB 070209: Swift XRT refined analysis
  91. GRB 070220: Swift-XRT Refined Analysis
  92. GRB 070220 : Faulkes Telescope North optical limit
  93. GRB 070220: Swift detection of a burst
  94. GRB070219: MASTER-VWF-Kislovodsk observations
  95. GRB 070219: XRT Refined Analysis
  96. GRB 070219: Swift/UVOT Upper limits
  97. GRB 070219, Swift-BAT refined analysis
  98. GRB 070219: Liverpool Telescope Observations
  99. GRB 070219: ROTSE-III Optical Limits
  100. GRB070219 - SDSS Pre-Burst Observations

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