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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"

45715 results found.

  1. GRB050724: Refined analysis of the Swift-BAT possible short burst
  2. GRB 050724: possible host galaxy in DSS
  3. GRB050724: a short-burst detected by Swift
  4. Swift-BAT trigger 147325 is not due to a real GRB
  5. GRB050723: XRT distributed coordinates are not related to the burst
  6. GRB 050721: early afterglow light curve
  7. GRB 050721A: Swift-BAT refined analysis
  8. Correction to GCN Circ 3474 on GRB050525A
  9. GRB 050721A: Early Swift XRT analysis results
  10. GRB050721A: optical decay
  11. GRB 050721: optical afterglow confirmed
  12. Swift BAT Trigger 146986 is SWIFT J1753.5-0127
  13. GRB 050721a: Optical Observations
  14. GRB050721A: Swift-BAT detection of a weak burst
  15. GRB 050709: Refined Spectral and Temporal Properties
  16. GRB 050717: PROMPT RcIc Observations
  17. GRB050714b: Radio Observation
  18. GRB050712: Radio Observations
  19. GRB 050714a: Refined XRT analysis and afterglow confirmation
  20. GRB050713a: Radio Observation
  21. Swift-BAT trigger 146731 is not a real GRB
  22. GRB 050712, Tautenburg optical afterglow observations
  23. Swift-BAT detection of a possible GRB
  24. GRB 050714B: VLT R-band observations
  25. GRB 050717: Additional LCO observations
  26. GRB050717
  27. GRB 050716; J-band observations
  28. Konus-Wind observation of GRB 050717
  29. GRB 050717: LCO near-IR observations
  30. Swift/UVOT Observations of GRB 050717
  31. GRB 050717: Swift-BAT refined analysis
  32. GRB 050717: Refined XRT analysis.
  33. GRB050712: optical limits
  34. GRB050717: Swift XRT position
  35. Swift detection of GRB 050717
  36. GRB 050716 - UKIRT identification of candidate afterglow
  37. Swift UVOT Observations of GRB 050716
  38. GRB 050716: Refined XRT analysis.
  39. GRB050716: Refined analysis of the Swift-BAT burst
  40. GRB 050716: Lulin B and R band optical observations
  41. GRB050716, optical observation
  42. GRB 050716: Optical Observations
  43. GRB050716: Faulkes North Telescope observation
  44. GRB050716: Correction to sign in XRT coordinate
  45. Swift/BAT detection of GRB 050716
  46. GRB050715: Refined analysis of the Swift-BAT burst
  47. GRB 050715: Swift-BAT detection
  48. Swift UVOT Observations of GRB 050714B
  49. Konus-Wind observation of GRB 050713A
  50. GRB 050714B: refined XRT analysis
  51. GRB 050713b: RTT150 optical observations
  52. GRB 050714B: candidate afterglow does not fade
  53. GRB050714B: Refined analysis of the Swift-BAT burst
  54. GRB 050714B: optical afterglow
  55. Swift detection of a long transient (GRB 050714B?)
  56. GRB 050709: optical afterglow candidate
  57. GRB 050714, R-band candidate
  58. GRB 050714: Swift XRT afterglow position
  59. GRB 050714, optical observations
  60. GRB 050714A: ROTSE-III Optical Limits
  61. GRB 050714 - A long GRB detected with INTEGRAL
  62. GRB 050713A: XRT refined analysis
  63. GRB 050709: Spectroscopy
  64. GRB 050713A: RAPTOR detection of early optical emission
  65. GRB050713B :Swift/UVOT observations
  66. GRB050713b: XRT refined analysis
  67. GRB050712: TNG R-band observations
  68. GRB 050713B: Swift-BAT Refined Analysis
  69. Swift-BAT Trigger 145729 is not a GRB
  70. GRB 050713A: Swift/UVOT observation
  71. GRB 050713A : Swift-BAT Refined Analysis
  72. GRB050712: Swift UVOT Observation of Afterglow Emission
  73. GRB 050713A : Lulin R-band observation
  74. GRB 050713A XMM-Newton observation
  75. GRB 050713b : Lulin R-band observations
  76. GRB050713B: Faulkes North Telescope observation
  77. RBO RI observations of GRB 050713A
  78. GRB 050713B
  79. GRB050709 : Chandra source optical counterpart
  80. GRB050713: Liverpool Telescope prompt observations
  81. GRB 050712, optical observations
  82. GRB 050713 : Planned XMM-Newton observation
  83. GRB050709: Candidate X-ray Afterglow from Chandra
  84. GRB 050713, R-band observations at NOT
  85. GRB 050713: ARC NIR Detections and Identification of Fading
  86. GRB050713: possible I-band afterglow
  87. GRB 050713: Swift detection of Bright Burst
  88. GRB 050713A: ROTSE-III Optical Limits
  89. GRB050712: XRT refined analysis
  90. GRB050709: Radio Observations
  91. GRB 050709: Swift UVOT and XRT observations
  92. GRB 050712: Swift-BAT Refined Analysis
  93. GRB050712: UVOT candidate optical counterpart
  94. GRB 050712: Swift XRT afterglow position
  95. GRB 050712: Swift detection of a weak burst
  96. GRB 050709: LCO40 Observations
  97. GRB050709, optical observations
  98. GRB050709: A Possible Short-Hard GRB Localized by HETE
  99. PROMPT Rc Observations of GRB 050709
  100. GRB 050525a: PROMPT VRcIc Detections

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