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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"

38152 results found.

  1. GRB 050724: Swift/UVOT Upper Limit
  2. GRB 050724: early Swift XRT analysis results
  3. GRB 050724 : Lulin early R-band monitoring observations
  4. GRB050724: Refined analysis of the Swift-BAT possible short burst
  5. GRB 050724: possible host galaxy in DSS
  6. Swift-BAT trigger 147325 is not due to a real GRB
  7. GRB050723: XRT distributed coordinates are not related to the burst
  8. GRB 050721: early afterglow light curve
  9. GRB 050721A: Swift-BAT refined analysis
  10. Correction to GCN Circ 3474 on GRB050525A
  11. GRB 050721A: Early Swift XRT analysis results
  12. GRB050721A: optical decay
  13. GRB 050721: optical afterglow confirmed
  14. Swift BAT Trigger 146986 is SWIFT J1753.5-0127
  15. GRB 050721a: Optical Observations
  16. GRB 050709: Refined Spectral and Temporal Properties
  17. GRB 050717: PROMPT RcIc Observations
  18. GRB 050714a: Refined XRT analysis and afterglow confirmation
  19. Swift-BAT trigger 146731 is not a real GRB
  20. GRB 050712, Tautenburg optical afterglow observations
  21. Swift-BAT detection of a possible GRB
  22. GRB 050714B: VLT R-band observations
  23. GRB 050717: Additional LCO observations
  24. GRB050717
  25. GRB 050716; J-band observations
  26. Konus-Wind observation of GRB 050717
  27. GRB 050717: LCO near-IR observations
  28. Swift/UVOT Observations of GRB 050717
  29. GRB 050717: Swift-BAT refined analysis
  30. GRB 050717: Refined XRT analysis.
  31. GRB050712: optical limits
  32. Swift detection of GRB 050717
  33. GRB 050716 - UKIRT identification of candidate afterglow
  34. Swift UVOT Observations of GRB 050716
  35. GRB 050716: Refined XRT analysis.
  36. GRB 050716: Lulin B and R band optical observations
  37. GRB050716, optical observation
  38. GRB 050716: Optical Observations
  39. GRB050716: Faulkes North Telescope observation
  40. Swift/BAT detection of GRB 050716
  41. GRB 050715: Swift-BAT detection
  42. Swift UVOT Observations of GRB 050714B
  43. Konus-Wind observation of GRB 050713A
  44. GRB 050714B: refined XRT analysis
  45. GRB 050713b: RTT150 optical observations
  46. GRB 050714B: candidate afterglow does not fade
  47. GRB050714B: Refined analysis of the Swift-BAT burst
  48. GRB 050714B: optical afterglow
  49. Swift detection of a long transient (GRB 050714B?)
  50. GRB 050709: optical afterglow candidate
  51. GRB 050714, R-band candidate
  52. GRB 050714: Swift XRT afterglow position
  53. GRB 050714, optical observations
  54. GRB 050714A: ROTSE-III Optical Limits
  55. GRB 050714 - A long GRB detected with INTEGRAL
  56. GRB 050713A: XRT refined analysis
  57. GRB 050709: Spectroscopy
  58. GRB 050713A: RAPTOR detection of early optical emission
  59. GRB050713B :Swift/UVOT observations
  60. GRB050712: TNG R-band observations
  61. GRB 050713B: Swift-BAT Refined Analysis
  62. Swift-BAT Trigger 145729 is not a GRB
  63. GRB 050713A: Swift/UVOT observation
  64. GRB 050713A : Swift-BAT Refined Analysis
  65. GRB 050713A : Lulin R-band observation
  66. GRB 050713A XMM-Newton observation
  67. GRB 050713b : Lulin R-band observations
  68. GRB050713B: Faulkes North Telescope observation
  69. RBO RI observations of GRB 050713A
  70. GRB 050713B
  71. GRB050709 : Chandra source optical counterpart
  72. GRB050713: Liverpool Telescope prompt observations
  73. GRB 050712, optical observations
  74. GRB 050713 : Planned XMM-Newton observation
  75. GRB050709: Candidate X-ray Afterglow from Chandra
  76. GRB 050713, R-band observations at NOT
  77. GRB 050713: ARC NIR Detections and Identification of Fading
  78. GRB050713: possible I-band afterglow
  79. GRB 050713: Swift detection of Bright Burst
  80. GRB 050713A: ROTSE-III Optical Limits
  81. GRB 050709: Swift UVOT and XRT observations
  82. GRB 050712: Swift-BAT Refined Analysis
  83. GRB 050712: Swift XRT afterglow position
  84. GRB 050712: Swift detection of a weak burst
  85. GRB 050709: LCO40 Observations
  86. GRB050709: A Possible Short-Hard GRB Localized by HETE
  87. PROMPT Rc Observations of GRB 050709
  88. GRB 050525a: PROMPT VRcIc Detections
  89. GRB 050525a: ARC 3.5-meter Optical and NIR Observations
  90. GRB 050525a: ARC 3.5-Meter SPIcam Field Calibration
  91. GRB 050626 optical observations
  92. GRB 050626: Swift XRT observations
  93. GRB 050701
  94. GRB 050701, optical observations
  95. GRB 050408: ARC 3.5-meter NIR Observations
  96. GRB 050701: Refined XRT analysis
  97. Swift UVOT observations of GRB 050701
  98. GRB 050701: Swift XRT afterglow position
  99. Swift trigger 143708 is really GRB 050701
  100. GRB 050607, radio observations

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