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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"

45719 results found.

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

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