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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"

32767 results found.

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

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