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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.

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subject:"Swift"
body:"GRB"
submitter:"Judith Racusin"

36138 results found.

  1. GRB 050721a: Optical Observations
  2. GRB 050709: Refined Spectral and Temporal Properties
  3. GRB 050717: PROMPT RcIc Observations
  4. GRB 050714a: Refined XRT analysis and afterglow confirmation
  5. Swift-BAT trigger 146731 is not a real GRB
  6. GRB 050712, Tautenburg optical afterglow observations
  7. Swift-BAT detection of a possible GRB
  8. GRB 050714B: VLT R-band observations
  9. GRB 050717: Additional LCO observations
  10. GRB050717
  11. GRB 050716; J-band observations
  12. Konus-Wind observation of GRB 050717
  13. GRB 050717: LCO near-IR observations
  14. Swift/UVOT Observations of GRB 050717
  15. GRB 050717: Swift-BAT refined analysis
  16. GRB 050717: Refined XRT analysis.
  17. GRB050712: optical limits
  18. Swift detection of GRB 050717
  19. GRB 050716 - UKIRT identification of candidate afterglow
  20. Swift UVOT Observations of GRB 050716
  21. GRB 050716: Refined XRT analysis.
  22. GRB 050716: Lulin B and R band optical observations
  23. GRB050716, optical observation
  24. GRB 050716: Optical Observations
  25. GRB050716: Faulkes North Telescope observation
  26. Swift/BAT detection of GRB 050716
  27. GRB 050715: Swift-BAT detection
  28. Swift UVOT Observations of GRB 050714B
  29. Konus-Wind observation of GRB 050713A
  30. GRB 050714B: refined XRT analysis
  31. GRB 050713b: RTT150 optical observations
  32. GRB 050714B: candidate afterglow does not fade
  33. GRB050714B: Refined analysis of the Swift-BAT burst
  34. GRB 050714B: optical afterglow
  35. Swift detection of a long transient (GRB 050714B?)
  36. GRB 050709: optical afterglow candidate
  37. GRB 050714, R-band candidate
  38. GRB 050714: Swift XRT afterglow position
  39. GRB 050714, optical observations
  40. GRB 050714A: ROTSE-III Optical Limits
  41. GRB 050714 - A long GRB detected with INTEGRAL
  42. GRB 050713A: XRT refined analysis
  43. GRB 050709: Spectroscopy
  44. GRB 050713A: RAPTOR detection of early optical emission
  45. GRB050713B :Swift/UVOT observations
  46. GRB050712: TNG R-band observations
  47. GRB 050713B: Swift-BAT Refined Analysis
  48. Swift-BAT Trigger 145729 is not a GRB
  49. GRB 050713A: Swift/UVOT observation
  50. GRB 050713A : Swift-BAT Refined Analysis
  51. GRB 050713A : Lulin R-band observation
  52. GRB 050713A XMM-Newton observation
  53. GRB 050713b : Lulin R-band observations
  54. GRB050713B: Faulkes North Telescope observation
  55. RBO RI observations of GRB 050713A
  56. GRB 050713B
  57. GRB050709 : Chandra source optical counterpart
  58. GRB050713: Liverpool Telescope prompt observations
  59. GRB 050712, optical observations
  60. GRB 050713 : Planned XMM-Newton observation
  61. GRB050709: Candidate X-ray Afterglow from Chandra
  62. GRB 050713, R-band observations at NOT
  63. GRB 050713: ARC NIR Detections and Identification of Fading
  64. GRB050713: possible I-band afterglow
  65. GRB 050713: Swift detection of Bright Burst
  66. GRB 050713A: ROTSE-III Optical Limits
  67. GRB 050709: Swift UVOT and XRT observations
  68. GRB 050712: Swift-BAT Refined Analysis
  69. GRB 050712: Swift XRT afterglow position
  70. GRB 050712: Swift detection of a weak burst
  71. GRB 050709: LCO40 Observations
  72. GRB050709: A Possible Short-Hard GRB Localized by HETE
  73. PROMPT Rc Observations of GRB 050709
  74. GRB 050525a: PROMPT VRcIc Detections
  75. GRB 050525a: ARC 3.5-meter Optical and NIR Observations
  76. GRB 050525a: ARC 3.5-Meter SPIcam Field Calibration
  77. GRB 050626 optical observations
  78. GRB 050626: Swift XRT observations
  79. GRB 050701
  80. GRB 050701, optical observations
  81. GRB 050408: ARC 3.5-meter NIR Observations
  82. GRB 050701: Refined XRT analysis
  83. Swift UVOT observations of GRB 050701
  84. GRB 050701: Swift XRT afterglow position
  85. Swift trigger 143708 is really GRB 050701
  86. GRB 050607, radio observations
  87. GRB 050626 - Correction to GCN 3552
  88. GRB 050626 - a long GRB detected with INTEGRAL
  89. GRB 050525A: Swift Late-Time Decay Rate
  90. H3804: A Possible New XRB Detected by HETE
  91. XRF 050509c: Optical monitoring
  92. IBAS Alert #2512 is NOT a GRB
  93. GRB 050416(a): Host Galaxy Redshift Determination
  94. GRB 050607: MDM Observation
  95. GRB 050607 optical decay
  96. GRB 050607: RTT150 optical observations
  97. GRB 050607 : Lulin R-band observation
  98. GRB 050607: PROMPT VRcIc Observations
  99. GRB 050607: RAPTOR-S Early Optical Limits
  100. GRB 050525a, Mid-Infrared Observations

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