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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"

19605 results found.

  1. GRB051117A : XRT refined analysis
  2. GRB 051117B,optical observation
  3. GRB 051117B: Lulin R and I band observation
  4. GRB 051117B: Optical observations
  5. GRB 051117B: ROTSE-III Optical Limits
  6. GRB051117B: Swift XRT position
  7. GRB 051117B: Swift detection of a burst
  8. GRB 051117: Swift detection of a bright burst
  9. GRB051114: results of the Swift-XRT observation
  10. GRB 051114: Swift-BAT refined analysis
  11. GRB050925: analysis of the XMM-Newton observation
  12. GRB 051114: Swift-BAT detection of a short burst
  13. GRB 051113: Swift-BAT refined analysis
  14. GRB 051113: Swift-BAT detection of a burst
  15. GRB 051111: AEOS optical observations
  16. GRB 051109A Milagro GeV/TeV Observations
  17. GRB/SGR 050925: XMM-Newton ToO observation
  18. GRB051111: Swift/UVOT Observations
  19. GRB051111: XRT preliminary analysis
  20. GRB 051111: Swift-BAT refined analysis
  21. GRB 051109A Optical Observations
  22. GRB051111a: SARA Observations
  23. GRB 051111A: KAIT optical observations
  24. GRB051111: Super-LOTIS Early Detection
  25. GRB 051111: ROTSE-III Analysis of Prompt Counterpart
  26. Faulkes Telescope R-band detection of GRB051111
  27. GRB051111: Swift-BAT detection of a bright burst
  28. GRB 051111A: ROTSE-III Detection of Possible Counterpart
  29. Early RAPTOR measurements of GRB 051109a - the movie.
  30. Konus-Wind observation of GRB 051109A
  31. GRB 051109B: Swift-BAT refined analysis
  32. GRB 051109B: ROTSE-III Optical Limits
  33. GRB 051109A: Swift-UVOT Observations
  34. IPN triangulation and Konus spectrum of the short/soft GRB051107 (large
  35. GRB051109B: no UVOT source detected
  36. GRB051109B: XRT refined analysis
  37. GRB 051109B : Lulin Optical Observations
  38. GRB051109A: further steepening in the X-ray light curve
  39. GRB051109A: XRT refined analysis
  40. GRB051109B: XRT position
  41. GRB 051109B: Super-LOTIS Observations
  42. GRB 051109B Kiso optical follow-up observation
  43. GRB 051109B: Swift detection of a burst
  44. GRB051109: Early Super-LOTIS Detection
  45. GRB 051109: Swift-BAT refined analysis
  46. GRB 051109a: MDM Observations
  47. GRB 051109A: ROTSE-III Decline rate for Optical Counterpart
  48. GRB051109: Swift detection of a burst
  49. GRB 051109a: IR Detections
  50. GRB 051109: ROTSE-III Detection of Possible Counterpart
  51. GRB051105B: Swift/XRT upper limit
  52. GRB051105B: Swift/UVOT upper limit
  53. GRB051028: Swift-XRT refined analysis
  54. GRB 051105a: MDM Observations
  55. GRB051105A: Swift/UVOT Observations
  56. IPN triangulation and Konus spectrum of the bright short/hard GRB051103
  57. XRT observations of GRB 051105A
  58. GRB 051105: Swift-BAT improved refined analysis
  59. GRB 051105: Swift-BAT refined analysis
  60. GRB 051105: Swift detection of a short burst
  61. GRB051028: Swift/UVOT upper limits
  62. GRB051028: Swift XRT Position
  63. GRB 051022: XRT Refined Spectral and Temporal Analysis--Correction
  64. GRB051022: Swift XRT measurement of jet break
  65. GRB051021B: Swift/UVOT Upper limits
  66. GRB 051022: XRT Refined Spectral and Temporal Analysis
  67. GRB051012: Swift-XRT analysis
  68. GRB051021B: Swift XRT refined analysis
  69. GRB 051022: WSRT Radio Detection
  70. GRB 051022: Swift/UVOT Upper Limits
  71. GRB051021A: Swift XRT refined analysis
  72. GRB051022: Optical Observations
  73. GRB 051022, J & K-band observation
  74. GRB051022: Swift XRT Position
  75. GRB051021: Swift/UVOT Upper Limits
  76. GRB 051021B: Refined analysis of the Swift-BAT burst
  77. GRB051021B: Swift XRT Position
  78. GRB 051021B: Swift detection of a burst
  79. GRB051021: Swift XRT analysis
  80. GRB051021.63
  81. Swift-BAT trigger 160640 is not a real GRB
  82. Swift-BAT trigger 160619 is not a GRB
  83. Swift-BAT triggered on a posible CR Shower or possible GRB
  84. GRB 051016A: Swift/UVOT upper limits
  85. GRB 051016B: refined analysis of the Swift/XRT data
  86. GRB 051016B: Swift/UVOT detection
  87. GRB 051016B : Optical follow-up at Lulin
  88. GRB 051016B: Refined analysis of the Swift-BAT burst
  89. GRB 051016B: Swift detection of a soft burst
  90. GRB 051016: Swift-BAT refined analysis
  91. GRB051016 XMM-Newton observation
  92. GRB051016: Swift XRT refined analysis.
  93. GRB051016: Swift detection of a burst
  94. Photometric calibration of Swift/UVOT and Re-analysis of Swift/UVOT GRB 050922C data
  95. GRB 051012: Swift-BAT detection of burst yesterday
  96. Swift trigger 159578 is not a burst
  97. Swift-BAT Trigger 159578 is a possible burst
  98. GRB050805A: Rc optical observations
  99. GRB 051006: Swift/UVOT Upper Limits
  100. GRB 051008 - a low redshift low-luminosity burst?

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