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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"

37985 results found.

  1. GRB 050709: optical afterglow candidate
  2. GRB 050714, R-band candidate
  3. GRB 050714: Swift XRT afterglow position
  4. GRB 050714, optical observations
  5. GRB 050714A: ROTSE-III Optical Limits
  6. GRB 050714 - A long GRB detected with INTEGRAL
  7. GRB 050713A: XRT refined analysis
  8. GRB 050709: Spectroscopy
  9. GRB 050713A: RAPTOR detection of early optical emission
  10. GRB050713B :Swift/UVOT observations
  11. GRB050713b: XRT refined analysis
  12. GRB050712: TNG R-band observations
  13. GRB 050713B: Swift-BAT Refined Analysis
  14. Swift-BAT Trigger 145729 is not a GRB
  15. GRB 050713A: Swift/UVOT observation
  16. GRB 050713A : Swift-BAT Refined Analysis
  17. GRB050712: Swift UVOT Observation of Afterglow Emission
  18. GRB 050713A : Lulin R-band observation
  19. GRB 050713A XMM-Newton observation
  20. GRB 050713b : Lulin R-band observations
  21. GRB050713B: Faulkes North Telescope observation
  22. RBO RI observations of GRB 050713A
  23. GRB 050713B
  24. GRB050709 : Chandra source optical counterpart
  25. GRB050713: Liverpool Telescope prompt observations
  26. GRB 050712, optical observations
  27. GRB 050713 : Planned XMM-Newton observation
  28. GRB050709: Candidate X-ray Afterglow from Chandra
  29. GRB 050713, R-band observations at NOT
  30. GRB 050713: ARC NIR Detections and Identification of Fading
  31. GRB050713: possible I-band afterglow
  32. GRB 050713: Swift detection of Bright Burst
  33. GRB 050713A: ROTSE-III Optical Limits
  34. GRB050712: XRT refined analysis
  35. GRB 050709: Swift UVOT and XRT observations
  36. GRB 050712: Swift-BAT Refined Analysis
  37. GRB050712: UVOT candidate optical counterpart
  38. GRB 050712: Swift XRT afterglow position
  39. GRB 050712: Swift detection of a weak burst
  40. GRB 050709: LCO40 Observations
  41. GRB050709: A Possible Short-Hard GRB Localized by HETE
  42. PROMPT Rc Observations of GRB 050709
  43. GRB 050525a: PROMPT VRcIc Detections
  44. GRB 050525a: ARC 3.5-meter Optical and NIR Observations
  45. GRB 050525a: ARC 3.5-Meter SPIcam Field Calibration
  46. GRB 050626 optical observations
  47. GRB 050626: Swift XRT observations
  48. GRB 050701
  49. GRB 050701, optical observations
  50. GRB 050408: ARC 3.5-meter NIR Observations
  51. GRB 050701: Refined XRT analysis
  52. Swift UVOT observations of GRB 050701
  53. GRB050701: Swift-BAT Refined analysis
  54. GRB 050701: Swift XRT afterglow position
  55. Swift trigger 143708 is really GRB 050701
  56. GRB 050607, radio observations
  57. GRB 050626 - Correction to GCN 3552
  58. GRB 050626 - a long GRB detected with INTEGRAL
  59. GRB 050525A: Swift Late-Time Decay Rate
  60. CORRECTION: GRB050603 Swift UVOT Afterglow Observations
  61. H3804: A Possible New XRB Detected by HETE
  62. XRF 050509c: Optical monitoring
  63. IBAS Alert #2512 is NOT a GRB
  64. GRB 050416(a): Host Galaxy Redshift Determination
  65. GRB 050607: MDM Observation
  66. GRB 050607 optical decay
  67. GRB 050607: RTT150 optical observations
  68. Swift/UVOT observations of GRB050607
  69. GRB 050607 : Lulin R-band observation
  70. GRB 050607: PROMPT VRcIc Observations
  71. GRB 050607: RAPTOR-S Early Optical Limits
  72. GRB050607: KAIT optical limits
  73. GRB 050525a, Mid-Infrared Observations
  74. GRB 050607: Optical decay and spectral slope
  75. GRB 050607: MDM Observations
  76. GRB050607,optical observation
  77. GRB 050607 - XRT refined data analysis
  78. Optical Afterglow of GRB 050607
  79. GRB050607 optical limit by "Pi of the Sky"
  80. GRB050607: Swift Detection of a long GRB
  81. GRB050607: P60 Observations
  82. GRB 050603: prediction of t_break
  83. Limits on a SN in the field of GRB 050509b
  84. GRB 050603: Redshift
  85. GRB 050603 - XRT data analysis of the first day
  86. Konus-Wind observation of GRB 050603
  87. GRB 050603: Analysis of UVOT data
  88. GRB050603: Fading Afterglow observed by Swift UVOT
  89. GRB 050603: Swift XRT Position
  90. GRB050603: Radio Detection
  91. GRB 050603: Swift-BAT refined analysis of a long three-spiked burst
  92. GRB 050603: Afterglow Identification from LCO
  93. GRB 050603: INTEGRAL shows it is not a short GRB
  94. Swift/BAT Detection of GRB050603
  95. GRB 050408: jet break in the XRT light curve
  96. GRB 050525a, infrared observations
  97. GRB 050525a, SMARTS optical/IR afterglow observations
  98. GRB050528, XRT observations
  99. Correction to GCN Circ 3502 on GRB 050528
  100. GRB050528: updated Liverpool Telescope limits

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