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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"

36243 results found.

  1. GRB050717
  2. GRB 050716; J-band observations
  3. Konus-Wind observation of GRB 050717
  4. GRB 050717: LCO near-IR observations
  5. Swift/UVOT Observations of GRB 050717
  6. GRB 050717: Swift-BAT refined analysis
  7. GRB 050717: Refined XRT analysis.
  8. GRB050712: optical limits
  9. Swift detection of GRB 050717
  10. GRB 050716 - UKIRT identification of candidate afterglow
  11. Swift UVOT Observations of GRB 050716
  12. GRB 050716: Refined XRT analysis.
  13. GRB 050716: Lulin B and R band optical observations
  14. GRB050716, optical observation
  15. GRB 050716: Optical Observations
  16. GRB050716: Faulkes North Telescope observation
  17. Swift/BAT detection of GRB 050716
  18. GRB 050715: Swift-BAT detection
  19. Swift UVOT Observations of GRB 050714B
  20. Konus-Wind observation of GRB 050713A
  21. GRB 050714B: refined XRT analysis
  22. GRB 050713b: RTT150 optical observations
  23. GRB 050714B: candidate afterglow does not fade
  24. GRB050714B: Refined analysis of the Swift-BAT burst
  25. GRB 050714B: optical afterglow
  26. Swift detection of a long transient (GRB 050714B?)
  27. GRB 050709: optical afterglow candidate
  28. GRB 050714, R-band candidate
  29. GRB 050714: Swift XRT afterglow position
  30. GRB 050714, optical observations
  31. GRB 050714A: ROTSE-III Optical Limits
  32. GRB 050714 - A long GRB detected with INTEGRAL
  33. GRB 050713A: XRT refined analysis
  34. GRB 050709: Spectroscopy
  35. GRB 050713A: RAPTOR detection of early optical emission
  36. GRB050713B :Swift/UVOT observations
  37. GRB050712: TNG R-band observations
  38. GRB 050713B: Swift-BAT Refined Analysis
  39. Swift-BAT Trigger 145729 is not a GRB
  40. GRB 050713A: Swift/UVOT observation
  41. GRB 050713A : Swift-BAT Refined Analysis
  42. GRB 050713A : Lulin R-band observation
  43. GRB 050713A XMM-Newton observation
  44. GRB 050713b : Lulin R-band observations
  45. GRB050713B: Faulkes North Telescope observation
  46. RBO RI observations of GRB 050713A
  47. GRB 050713B
  48. GRB050709 : Chandra source optical counterpart
  49. GRB050713: Liverpool Telescope prompt observations
  50. GRB 050712, optical observations
  51. GRB 050713 : Planned XMM-Newton observation
  52. GRB050709: Candidate X-ray Afterglow from Chandra
  53. GRB 050713, R-band observations at NOT
  54. GRB 050713: ARC NIR Detections and Identification of Fading
  55. GRB050713: possible I-band afterglow
  56. GRB 050713: Swift detection of Bright Burst
  57. GRB 050713A: ROTSE-III Optical Limits
  58. GRB 050709: Swift UVOT and XRT observations
  59. GRB 050712: Swift-BAT Refined Analysis
  60. GRB 050712: Swift XRT afterglow position
  61. GRB 050712: Swift detection of a weak burst
  62. GRB 050709: LCO40 Observations
  63. GRB050709: A Possible Short-Hard GRB Localized by HETE
  64. PROMPT Rc Observations of GRB 050709
  65. GRB 050525a: PROMPT VRcIc Detections
  66. GRB 050525a: ARC 3.5-meter Optical and NIR Observations
  67. GRB 050525a: ARC 3.5-Meter SPIcam Field Calibration
  68. GRB 050626 optical observations
  69. GRB 050626: Swift XRT observations
  70. GRB 050701
  71. GRB 050701, optical observations
  72. GRB 050408: ARC 3.5-meter NIR Observations
  73. GRB 050701: Refined XRT analysis
  74. Swift UVOT observations of GRB 050701
  75. GRB 050701: Swift XRT afterglow position
  76. Swift trigger 143708 is really GRB 050701
  77. GRB 050607, radio observations
  78. GRB 050626 - Correction to GCN 3552
  79. GRB 050626 - a long GRB detected with INTEGRAL
  80. GRB 050525A: Swift Late-Time Decay Rate
  81. H3804: A Possible New XRB Detected by HETE
  82. XRF 050509c: Optical monitoring
  83. IBAS Alert #2512 is NOT a GRB
  84. GRB 050416(a): Host Galaxy Redshift Determination
  85. GRB 050607: MDM Observation
  86. GRB 050607 optical decay
  87. GRB 050607: RTT150 optical observations
  88. GRB 050607 : Lulin R-band observation
  89. GRB 050607: PROMPT VRcIc Observations
  90. GRB 050607: RAPTOR-S Early Optical Limits
  91. GRB 050525a, Mid-Infrared Observations
  92. GRB 050607: Optical decay and spectral slope
  93. GRB 050607: MDM Observations
  94. GRB050607,optical observation
  95. GRB 050607 - XRT refined data analysis
  96. Optical Afterglow of GRB 050607
  97. GRB050607 optical limit by "Pi of the Sky"
  98. GRB050607: Swift Detection of a long GRB
  99. GRB050607: P60 Observations
  100. GRB 050603: prediction of t_break

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