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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"

27157 results found.

  1. GRB 070411: TLS data shows plateau, flares
  2. GRB070412: UKIRT-WFCAM JHK upper limits
  3. GRB070412: Swift UVOT observations
  4. IBAS Alert n.4199: Not a GRB
  5. GRB 070411: Swift/UVOT observations
  6. GRB 070412, Swift-BAT refined analysis
  7. GRB 070412 Liverpool Telescope optical limit
  8. GRB 070412: Swift-XRT refined analysis
  9. GRB 070411: Swift-XRT refined analysis
  10. GRB 070412: IAC80 optical afterglow candidate
  11. GRB 070412: NOT observations
  12. GRB 070411, Swift-BAT refined analysis
  13. GRB 070412: Swift detection of a burst
  14. GRB 070411: IAC80 optical observations
  15. GRB 070411 : Liverpool Telescope Observations
  16. GRB 070411: ROTSE-III Detection of Optical Counterpart
  17. GRB 070411: Tautenburg RRM Afterglow Confirmation
  18. GRB 070411: Swift detection of a burst with optical afterglow
  19. GRB 070406, Swift-BAT refined analysis
  20. GRB070406: Swift UVOT observations
  21. GRB 070406: further analysis of NOT images.
  22. GRB 070406: Swift XRT Team analysis - Possible X-ray counterpart
  23. GRB 070406: SARA upper limit
  24. GRB 070406: Swift detection of a burst
  25. GRB 070402: Suzaku WAM observation of the prompt emission
  26. GRB 070328: Suzaku WAM observation of the prompt emission
  27. UVOT observations of GRB070330
  28. GRB 070330, Swift-BAT refined analysis
  29. GRB 070330: TAROT La Silla observatory optical observations
  30. GRB 070330 - Watcher Observations
  31. GRB 070330: Swift detection of a burst
  32. Konus-Wind observation of GRB 070328
  33. GRB 070328: Swift/UVOT Upper Limits
  34. GRB 070328: Swift/XRT Refined Analysis
  35. GRB 070328, Swift-BAT refined analysis
  36. GRB 070328: Swift detection of a burst
  37. GRB070318: Swift UVOT indicates unusual optical/UV afterglow
  38. GRB 070318: Gemini + Magellan spectra
  39. GRB070318: Swift UVOT continuing observations
  40. GRB070318: Swift-XRT refined analysis
  41. GRB 070318: Swift/UVOT Continued Observations
  42. GRB 070318, Swift-BAT refined analysis
  43. IBAS Alert n. 4176: not a GRB
  44. GRB 070318: Swift detection of a burst with an optical afterglow
  45. IBAS Alert n. 4169: not a GRB
  46. GRB 070311: SARA upper limit
  47. GRB 070311: RAPTOR Detection of Optical Emission
  48. GRB070311: FRAM early follow-up limit
  49. GRB 070311: Swift/UVOT Upper Limits
  50. GRB 070311: Swift-XRT refined analysis
  51. GRB 070311: REM candidate afterglow
  52. GRB 070309: Swift/UVOT Upper Limits
  53. GRB 070306, optical observation
  54. IBAS Alert 4162: Not a GRB
  55. GRB 070306 Swift/UVOT refined analysis
  56. GRB070306: confirmation of near infrared afterglow
  57. GRB 070306: ART-3 early optical and near infrared constraints
  58. GRB 070306, Swift-BAT refined analysis
  59. GRB 070306: XRT Team Refined Analysis
  60. GRB070306 - SDSS Pre-burst Observations
  61. GRB 070306: Swift detection of a burst
  62. GRB070227: Swift-XRT refined analysis
  63. GRB 070227: Swift/UVOT Upper Limits
  64. GRB 070227: TAROT La Silla observatory optical observations
  65. GRB 070227, Swift-BAT refined analysis
  66. GRB070227: possible X-ray afterglow detection
  67. GRB 070227: Swift detection of a burst in ground analysis
  68. IBAS Alert n. 4144: not a GRB
  69. GRB 070224: Swift/UVOT Upper Limits
  70. GRB070224: Magellan Imaging Observations
  71. GRB070224: Gemini Imaging Observations
  72. GRB 070224: SARA upper limit
  73. GRB 070224, Swift-BAT refined analysis
  74. GRB 070224: MASTER-Net refind analysis
  75. GRB 070224: MASTER-VWF-Kislovodsk observations
  76. GRB 070224: Swift detection of a burst
  77. GRB070223: Swift/UVOT refined analysis
  78. GRB 070223, Swift-BAT refined analysis
  79. GRB070223: MASTER-VWF-Kislovodsk observations
  80. GRB 070223: Swift-XRT Refined Analysis
  81. GRB070223 - SDSS Pre-Burst Observations
  82. GRB 070223: Liverpool Telescope Possible Afterglow Candidate
  83. GRB070223: Swift burst
  84. Konus-Wind and Konus-A observations of GRB 070220
  85. GRB 070220 Swift-BAT Refined Analysis
  86. Swift/UVOT refined analysis of GRB070220
  87. GRB 070209: Swift XRT refined analysis
  88. GRB 070220: Swift-XRT Refined Analysis
  89. GRB 070220 : Faulkes Telescope North optical limit
  90. GRB 070220: Swift detection of a burst
  91. GRB070219: MASTER-VWF-Kislovodsk observations
  92. GRB 070219: XRT Refined Analysis
  93. GRB 070219: Swift/UVOT Upper limits
  94. GRB 070219, Swift-BAT refined analysis
  95. GRB 070219: Liverpool Telescope Observations
  96. GRB 070219: ROTSE-III Optical Limits
  97. GRB070219 - SDSS Pre-Burst Observations
  98. GRB 070219: Swift detection of a burst
  99. Swift-BAT trigger 260304 is NOT a burst or transient
  100. GRB 070209: Swift XRT analysis

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