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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"

32763 results found.

  1. GRB 050724: Optical limit
  2. GRB 050724: optical and near-IR observations
  3. GRB 050724: Optical imaging/astrometry
  4. GRB 050724: RTT150 optical observations
  5. GRB 050724: Swift/UVOT Upper Limit
  6. GRB 050724: early Swift XRT analysis results
  7. GRB 050724 : Lulin early R-band monitoring observations
  8. GRB050724: Refined analysis of the Swift-BAT possible short burst
  9. GRB 050724: possible host galaxy in DSS
  10. Swift-BAT trigger 147325 is not due to a real GRB
  11. GRB050723: XRT distributed coordinates are not related to the burst
  12. GRB 050721: early afterglow light curve
  13. GRB 050721A: Swift-BAT refined analysis
  14. Correction to GCN Circ 3474 on GRB050525A
  15. GRB 050721A: Early Swift XRT analysis results
  16. GRB050721A: optical decay
  17. GRB 050721: optical afterglow confirmed
  18. Swift BAT Trigger 146986 is SWIFT J1753.5-0127
  19. GRB 050721a: Optical Observations
  20. GRB 050709: Refined Spectral and Temporal Properties
  21. GRB 050717: PROMPT RcIc Observations
  22. GRB050714b: Radio Observation
  23. GRB050712: Radio Observations
  24. GRB 050714a: Refined XRT analysis and afterglow confirmation
  25. GRB050713a: Radio Observation
  26. Swift-BAT trigger 146731 is not a real GRB
  27. GRB 050712, Tautenburg optical afterglow observations
  28. GRB 050714B: VLT R-band observations
  29. GRB 050717: Additional LCO observations
  30. GRB050717
  31. GRB 050716; J-band observations
  32. Konus-Wind observation of GRB 050717
  33. GRB 050717: LCO near-IR observations
  34. Swift/UVOT Observations of GRB 050717
  35. GRB 050717: Swift-BAT refined analysis
  36. GRB 050717: Refined XRT analysis.
  37. GRB050712: optical limits
  38. GRB050717: Swift XRT position
  39. GRB 050716 - UKIRT identification of candidate afterglow
  40. Swift UVOT Observations of GRB 050716
  41. GRB 050716: Refined XRT analysis.
  42. GRB050716: Refined analysis of the Swift-BAT burst
  43. GRB 050716: Lulin B and R band optical observations
  44. GRB050716, optical observation
  45. GRB 050716: Optical Observations
  46. GRB050716: Faulkes North Telescope observation
  47. GRB050716: Correction to sign in XRT coordinate
  48. GRB050715: Refined analysis of the Swift-BAT burst
  49. Swift UVOT Observations of GRB 050714B
  50. Konus-Wind observation of GRB 050713A
  51. GRB 050714B: refined XRT analysis
  52. GRB 050713b: RTT150 optical observations
  53. GRB 050714B: candidate afterglow does not fade
  54. GRB050714B: Refined analysis of the Swift-BAT burst
  55. GRB 050714B: optical afterglow
  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 050713A: XRT refined analysis
  62. GRB 050709: Spectroscopy
  63. GRB 050713A: RAPTOR detection of early optical emission
  64. GRB050713B :Swift/UVOT observations
  65. GRB050713b: XRT refined analysis
  66. GRB050712: TNG R-band observations
  67. GRB 050713B: Swift-BAT Refined Analysis
  68. Swift-BAT Trigger 145729 is not a GRB
  69. GRB 050713A: Swift/UVOT observation
  70. GRB 050713A : Swift-BAT Refined Analysis
  71. GRB050712: Swift UVOT Observation of Afterglow Emission
  72. GRB 050713A XMM-Newton observation
  73. GRB 050713b : Lulin R-band observations
  74. GRB050713B: Faulkes North Telescope observation
  75. RBO RI observations of GRB 050713A
  76. GRB050709 : Chandra source optical counterpart
  77. GRB050713: Liverpool Telescope prompt observations
  78. GRB 050712, optical observations
  79. GRB050709: Candidate X-ray Afterglow from Chandra
  80. GRB 050713: ARC NIR Detections and Identification of Fading
  81. GRB050713: possible I-band afterglow
  82. GRB 050713A: ROTSE-III Optical Limits
  83. GRB050712: XRT refined analysis
  84. GRB050709: Radio Observations
  85. GRB 050709: Swift UVOT and XRT observations
  86. GRB 050712: Swift-BAT Refined Analysis
  87. GRB050712: UVOT candidate optical counterpart
  88. GRB 050712: Swift XRT afterglow position
  89. GRB 050709: LCO40 Observations
  90. GRB050709, optical observations
  91. GRB050709: A Possible Short-Hard GRB Localized by HETE
  92. GRB 050525a: PROMPT VRcIc Detections
  93. GRB 050525a: ARC 3.5-meter Optical and NIR Observations
  94. GRB 050626 optical observations
  95. GRB 050701
  96. GRB 050701, optical observations
  97. GRB 050408: ARC 3.5-meter NIR Observations
  98. GRB 050701: Refined XRT analysis
  99. Swift UVOT observations of GRB 050701
  100. GRB050701: Swift-BAT Refined analysis

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