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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"

43005 results found.

  1. GRB 050726, SMARTS optical/IR observations
  2. Swift-BAT trigger 147918 is not a real GRB
  3. GRB050724: VLT observations of the variable source
  4. GRB050727: KAIT optical limit
  5. GRB050709: Second Epoch Chandra Observation
  6. GRB 050726: PROMPT Rc Observations
  7. GRB050709: Second Epoch Chandra Observation
  8. GRB 050724: dust-scattered X-ray halo detected in SWIFT/XRT observation
  9. GRB050724: Further Radio Observations
  10. GRB 050726: early Swift XRT analysis results
  11. GRB050726: Swift-BAT detection of a weak burst
  12. GRB 050724: Optical Variability in Nearby Galaxy
  13. GRB 050724: GMOS Imaging and Spectroscopy
  14. GRB 050724: SWIFT XRT refined position
  15. RXTE ASM Detection of GRB050724
  16. GRB050724: Radio Observation
  17. GRB 050724: spectroscopy of object in the XRT error circle
  18. GRB 050724: Optical limit
  19. GRB 050724: optical and near-IR observations
  20. GRB 050724: Optical imaging/astrometry
  21. GRB 050724: RTT150 optical observations
  22. GRB 050724: Swift/UVOT Upper Limit
  23. GRB 050724: early Swift XRT analysis results
  24. GRB050724: Refined analysis of the Swift-BAT possible short burst
  25. GRB 050724: possible host galaxy in DSS
  26. GRB050724: a short-burst detected by Swift
  27. GRB 050721: early afterglow light curve
  28. GRB 050721A: Swift-BAT refined analysis
  29. Correction to GCN Circ 3474 on GRB050525A
  30. GRB 050721A: Early Swift XRT analysis results
  31. GRB050721A: optical decay
  32. GRB 050721: optical afterglow confirmed
  33. Swift BAT Trigger 146986 is SWIFT J1753.5-0127
  34. GRB 050721a: Optical Observations
  35. GRB050721A: Swift-BAT detection of a weak burst
  36. GRB 050709: Refined Spectral and Temporal Properties
  37. GRB 050717: PROMPT RcIc Observations
  38. GRB050712: Radio Observations
  39. GRB 050714a: Refined XRT analysis and afterglow confirmation
  40. Swift-BAT detection of a possible GRB
  41. GRB 050714B: VLT R-band observations
  42. GRB 050717: Additional LCO observations
  43. GRB050717
  44. Konus-Wind observation of GRB 050717
  45. GRB 050717: LCO near-IR observations
  46. Swift/UVOT Observations of GRB 050717
  47. GRB 050717: Swift-BAT refined analysis
  48. GRB 050717: Refined XRT analysis.
  49. GRB050712: optical limits
  50. GRB050717: Swift XRT position
  51. Swift detection of GRB 050717
  52. GRB 050716 - UKIRT identification of candidate afterglow
  53. Swift UVOT Observations of GRB 050716
  54. GRB 050716: Refined XRT analysis.
  55. GRB050716: Refined analysis of the Swift-BAT burst
  56. GRB 050716: Lulin B and R band optical observations
  57. GRB 050716: Optical Observations
  58. GRB050716: Correction to sign in XRT coordinate
  59. Swift/BAT detection of GRB 050716
  60. GRB 050715: Swift-BAT detection
  61. Konus-Wind observation of GRB 050713A
  62. GRB 050714B: refined XRT analysis
  63. GRB 050713b: RTT150 optical observations
  64. GRB 050714B: candidate afterglow does not fade
  65. GRB050714B: Refined analysis of the Swift-BAT burst
  66. Swift detection of a long transient (GRB 050714B?)
  67. GRB 050709: optical afterglow candidate
  68. GRB 050714, R-band candidate
  69. GRB 050714: Swift XRT afterglow position
  70. GRB 050714, optical observations
  71. GRB 050714A: ROTSE-III Optical Limits
  72. GRB 050714 - A long GRB detected with INTEGRAL
  73. GRB 050713A: XRT refined analysis
  74. GRB 050709: Spectroscopy
  75. GRB 050713A: RAPTOR detection of early optical emission
  76. GRB050713B :Swift/UVOT observations
  77. GRB050713b: XRT refined analysis
  78. GRB050712: TNG R-band observations
  79. GRB 050713B: Swift-BAT Refined Analysis
  80. Swift-BAT Trigger 145729 is not a GRB
  81. GRB 050713A: Swift/UVOT observation
  82. GRB 050713A : Swift-BAT Refined Analysis
  83. GRB050712: Swift UVOT Observation of Afterglow Emission
  84. GRB 050713A : Lulin R-band observation
  85. GRB 050713A XMM-Newton observation
  86. RBO RI observations of GRB 050713A
  87. GRB 050713B
  88. GRB050709 : Chandra source optical counterpart
  89. GRB050713: Liverpool Telescope prompt observations
  90. GRB 050712, optical observations
  91. GRB050709: Candidate X-ray Afterglow from Chandra
  92. GRB 050713, R-band observations at NOT
  93. GRB 050713: ARC NIR Detections and Identification of Fading
  94. GRB 050713: Swift detection of Bright Burst
  95. GRB 050713A: ROTSE-III Optical Limits
  96. GRB050712: XRT refined analysis
  97. GRB050709: Radio Observations
  98. GRB 050709: Swift UVOT and XRT observations
  99. GRB 050712: Swift-BAT Refined Analysis
  100. GRB050712: UVOT candidate optical counterpart

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