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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"

19607 results found.

  1. GRB 051117A: Refined analysis of the Swift-BAT burst
  2. GRB 051117B: Refined analysis of the Swift-BAT burst
  3. GRB051117A : XRT refined analysis
  4. GRB 051117B,optical observation
  5. GRB 051117B: Lulin R and I band observation
  6. GRB 051117B: Optical observations
  7. GRB 051117B: ROTSE-III Optical Limits
  8. GRB051117B: Swift XRT position
  9. GRB 051117B: Swift detection of a burst
  10. GRB 051117: Swift detection of a bright burst
  11. GRB051114: results of the Swift-XRT observation
  12. GRB 051114: Swift-BAT refined analysis
  13. GRB050925: analysis of the XMM-Newton observation
  14. GRB 051114: Swift-BAT detection of a short burst
  15. GRB 051113: Swift-BAT refined analysis
  16. GRB 051113: Swift-BAT detection of a burst
  17. GRB 051111: AEOS optical observations
  18. GRB 051109A Milagro GeV/TeV Observations
  19. GRB/SGR 050925: XMM-Newton ToO observation
  20. GRB051111: Swift/UVOT Observations
  21. GRB051111: XRT preliminary analysis
  22. GRB 051111: Swift-BAT refined analysis
  23. GRB 051109A Optical Observations
  24. GRB051111a: SARA Observations
  25. GRB 051111A: KAIT optical observations
  26. GRB051111: Super-LOTIS Early Detection
  27. GRB 051111: ROTSE-III Analysis of Prompt Counterpart
  28. Faulkes Telescope R-band detection of GRB051111
  29. GRB051111: Swift-BAT detection of a bright burst
  30. GRB 051111A: ROTSE-III Detection of Possible Counterpart
  31. Early RAPTOR measurements of GRB 051109a - the movie.
  32. Konus-Wind observation of GRB 051109A
  33. GRB 051109B: Swift-BAT refined analysis
  34. GRB 051109B: ROTSE-III Optical Limits
  35. GRB 051109A: Swift-UVOT Observations
  36. IPN triangulation and Konus spectrum of the short/soft GRB051107 (large
  37. GRB051109B: no UVOT source detected
  38. GRB051109B: XRT refined analysis
  39. GRB 051109B : Lulin Optical Observations
  40. GRB051109A: further steepening in the X-ray light curve
  41. GRB051109A: XRT refined analysis
  42. GRB051109B: XRT position
  43. GRB 051109B: Super-LOTIS Observations
  44. GRB 051109B Kiso optical follow-up observation
  45. GRB 051109B: Swift detection of a burst
  46. GRB051109: Early Super-LOTIS Detection
  47. GRB 051109: Swift-BAT refined analysis
  48. GRB 051109a: MDM Observations
  49. GRB 051109A: ROTSE-III Decline rate for Optical Counterpart
  50. GRB051109: Swift detection of a burst
  51. GRB 051109a: IR Detections
  52. GRB 051109: ROTSE-III Detection of Possible Counterpart
  53. GRB051105B: Swift/XRT upper limit
  54. GRB051105B: Swift/UVOT upper limit
  55. GRB051028: Swift-XRT refined analysis
  56. GRB 051105a: MDM Observations
  57. GRB051105A: Swift/UVOT Observations
  58. IPN triangulation and Konus spectrum of the bright short/hard GRB051103
  59. XRT observations of GRB 051105A
  60. GRB 051105: Swift-BAT improved refined analysis
  61. GRB 051105: Swift-BAT refined analysis
  62. GRB 051105: Swift detection of a short burst
  63. GRB051028: Swift/UVOT upper limits
  64. GRB051028: Swift XRT Position
  65. GRB 051022: XRT Refined Spectral and Temporal Analysis--Correction
  66. GRB051022: Swift XRT measurement of jet break
  67. GRB051021B: Swift/UVOT Upper limits
  68. GRB 051022: XRT Refined Spectral and Temporal Analysis
  69. GRB051012: Swift-XRT analysis
  70. GRB051021B: Swift XRT refined analysis
  71. GRB 051022: WSRT Radio Detection
  72. GRB 051022: Swift/UVOT Upper Limits
  73. GRB051021A: Swift XRT refined analysis
  74. GRB051022: Optical Observations
  75. GRB 051022, J & K-band observation
  76. GRB051022: Swift XRT Position
  77. GRB051021: Swift/UVOT Upper Limits
  78. GRB 051021B: Refined analysis of the Swift-BAT burst
  79. GRB051021B: Swift XRT Position
  80. GRB 051021B: Swift detection of a burst
  81. GRB051021: Swift XRT analysis
  82. GRB051021.63
  83. Swift-BAT trigger 160640 is not a real GRB
  84. Swift-BAT trigger 160619 is not a GRB
  85. Swift-BAT triggered on a posible CR Shower or possible GRB
  86. GRB 051016A: Swift/UVOT upper limits
  87. GRB 051016B: refined analysis of the Swift/XRT data
  88. GRB 051016B: Swift/UVOT detection
  89. GRB 051016B : Optical follow-up at Lulin
  90. GRB 051016B: Refined analysis of the Swift-BAT burst
  91. GRB 051016B: Swift detection of a soft burst
  92. GRB 051016: Swift-BAT refined analysis
  93. GRB051016 XMM-Newton observation
  94. GRB051016: Swift XRT refined analysis.
  95. GRB051016: Swift detection of a burst
  96. Photometric calibration of Swift/UVOT and Re-analysis of Swift/UVOT GRB 050922C data
  97. GRB 051012: Swift-BAT detection of burst yesterday
  98. Swift trigger 159578 is not a burst
  99. Swift-BAT Trigger 159578 is a possible burst
  100. GRB050805A: Rc optical observations

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