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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"

21525 results found.

  1. GRB 051117B: Swift detection of a burst
  2. GRB 051117: Swift detection of a bright burst
  3. GRB051114: results of the Swift-XRT observation
  4. GRB 051109B : Nainital upper limits
  5. GRB 051114: Swift-BAT refined analysis
  6. GRB050925: analysis of the XMM-Newton observation
  7. GRB 051114: Swift-BAT detection of a short burst
  8. GRB 051113: Swift-BAT refined analysis
  9. GRB 051113: Swift-BAT detection of a burst
  10. GRB 051111: AEOS optical observations
  11. GRB 051109A Milagro GeV/TeV Observations
  12. GRB/SGR 050925: XMM-Newton ToO observation
  13. GRB051111: Swift/UVOT Observations
  14. GRB051111: XRT preliminary analysis
  15. GRB 051111: Swift-BAT refined analysis
  16. GRB 051109A Optical Observations
  17. GRB051111a: SARA Observations
  18. GRB 051111A: KAIT optical observations
  19. GRB051111: Super-LOTIS Early Detection
  20. GRB 051111: ROTSE-III Analysis of Prompt Counterpart
  21. Faulkes Telescope R-band detection of GRB051111
  22. GRB051111: Swift-BAT detection of a bright burst
  23. GRB 051111A: ROTSE-III Detection of Possible Counterpart
  24. GRB 051008 Tautenburg Supernova Search
  25. GRB 051109B. Radio Observations
  26. Early RAPTOR measurements of GRB 051109a - the movie.
  27. Konus-Wind observation of GRB 051109A
  28. GRB 051109B: Swift-BAT refined analysis
  29. GRB 051109B: ROTSE-III Optical Limits
  30. GRB 051109A: Swift-UVOT Observations
  31. IPN triangulation and Konus spectrum of the short/soft GRB051107 (large
  32. GRB051109B: no UVOT source detected
  33. GRB051109B: XRT refined analysis
  34. GRB 051109B : Lulin Optical Observations
  35. GRB051109A: further steepening in the X-ray light curve
  36. GRB051109A: XRT refined analysis
  37. GRB051109B: XRT position
  38. GRB 051109B: Super-LOTIS Observations
  39. GRB 051109B Kiso optical follow-up observation
  40. GRB 051109B: Swift detection of a burst
  41. GRB051109: Early Super-LOTIS Detection
  42. GRB 051109: Swift-BAT refined analysis
  43. GRB 051109a: MDM Observations
  44. GRB 051109A: ROTSE-III Decline rate for Optical Counterpart
  45. GRB051109: Swift detection of a burst
  46. GRB 051109a: IR Detections
  47. GRB 051109: ROTSE-III Detection of Possible Counterpart
  48. GRB051105B: Swift/XRT upper limit
  49. GRB051105B: Swift/UVOT upper limit
  50. GRB051028: Swift-XRT refined analysis
  51. GRB 051105A, 2nd epoch optical observations
  52. GRB 051105a: MDM Observations
  53. GRB 051105A: TNG optical observations
  54. GRB051105A: Swift/UVOT Observations
  55. GRB 051105A, radio observations
  56. IPN triangulation and Konus spectrum of the bright short/hard GRB051103
  57. GRB 051105A, optical observations
  58. XRT observations of GRB 051105A
  59. GRB 051105: Swift-BAT improved refined analysis
  60. GRB 051105: Swift-BAT refined analysis
  61. GRB 051105: Swift detection of a short burst
  62. GRB 051022: RTT150 optical observations
  63. GRB051028: Swift/UVOT upper limits
  64. GRB051028: WHT optical candidate
  65. GRB051028: Swift XRT Position
  66. GRB 051022: XRT Refined Spectral and Temporal Analysis--Correction
  67. GRB051022: Swift XRT measurement of jet break
  68. GRB051021B: Swift/UVOT Upper limits
  69. GRB 051022: XRT Refined Spectral and Temporal Analysis
  70. GRB051012: Swift-XRT analysis
  71. GRB051021B: Swift XRT refined analysis
  72. GRB 051022: WSRT Radio Detection
  73. GRB051022: host galaxy redshift
  74. GRB 051022: Swift/UVOT Upper Limits
  75. GRB051022: IR observations
  76. GRB 051022: SOAR JKs Observations
  77. GRB051021A: Swift XRT refined analysis
  78. GRB051022: Optical Observations
  79. GRB 051022: Magellan NIR imaging
  80. GRB051021b: Magellan IR Imaging
  81. GRB 051022, J & K-band observation
  82. GRB051022: Swift XRT Position
  83. GRB051021: Swift/UVOT Upper Limits
  84. GRB 051021B: Refined analysis of the Swift-BAT burst
  85. GRB051021B: Swift XRT Position
  86. GRB 051021B: Swift detection of a burst
  87. GRB051021: Swift XRT analysis
  88. GRB051021.63
  89. Swift-BAT trigger 160640 is not a real GRB
  90. Swift-BAT trigger 160619 is not a GRB
  91. Swift-BAT triggered on a posible CR Shower or possible GRB
  92. GRB 051016b: Gemini Near IR Observations
  93. GRB 051016A: Swift/UVOT upper limits
  94. GRB 051016B: refined analysis of the Swift/XRT data
  95. GRB 051016B: Swift/UVOT detection
  96. GRB 051016B : Optical follow-up at Lulin
  97. GRB 051016B: Refined analysis of the Swift-BAT burst
  98. GRB 051016B: Swift detection of a soft burst
  99. GRB 051016: Swift-BAT refined analysis
  100. GRB051016 XMM-Newton observation

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