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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"

41866 results found.

  1. GRB050716, optical observation
  2. GRB 050716: Optical Observations
  3. GRB050716: Faulkes North Telescope observation
  4. GRB050716: Correction to sign in XRT coordinate
  5. Swift/BAT detection of GRB 050716
  6. GRB050715: Refined analysis of the Swift-BAT burst
  7. GRB 050715: Swift-BAT detection
  8. Swift UVOT Observations of GRB 050714B
  9. Konus-Wind observation of GRB 050713A
  10. GRB 050714B: refined XRT analysis
  11. GRB 050713b: RTT150 optical observations
  12. GRB 050714B: candidate afterglow does not fade
  13. GRB050714B: Refined analysis of the Swift-BAT burst
  14. GRB 050714B: optical afterglow
  15. Swift detection of a long transient (GRB 050714B?)
  16. GRB 050709: optical afterglow candidate
  17. GRB 050714, optical observations
  18. GRB 050714 - A long GRB detected with INTEGRAL
  19. GRB 050713A: XRT refined analysis
  20. GRB 050709: Spectroscopy
  21. GRB 050713A: RAPTOR detection of early optical emission
  22. GRB050713B :Swift/UVOT observations
  23. GRB050713b: XRT refined analysis
  24. GRB050712: TNG R-band observations
  25. GRB 050713B: Swift-BAT Refined Analysis
  26. GRB 050713A : Swift-BAT Refined Analysis
  27. GRB050712: Swift UVOT Observation of Afterglow Emission
  28. GRB 050713A : Lulin R-band observation
  29. GRB 050713A XMM-Newton observation
  30. GRB 050713b : Lulin R-band observations
  31. GRB050713B: Faulkes North Telescope observation
  32. RBO RI observations of GRB 050713A
  33. GRB 050713B
  34. GRB050709 : Chandra source optical counterpart
  35. GRB050713: Liverpool Telescope prompt observations
  36. GRB 050712, optical observations
  37. GRB050709: Candidate X-ray Afterglow from Chandra
  38. GRB 050713, R-band observations at NOT
  39. GRB 050713: ARC NIR Detections and Identification of Fading
  40. GRB050713: possible I-band afterglow
  41. GRB 050713: Swift detection of Bright Burst
  42. GRB050712: XRT refined analysis
  43. GRB050709: Radio Observations
  44. GRB 050709: Swift UVOT and XRT observations
  45. GRB 050712: Swift-BAT Refined Analysis
  46. GRB050712: UVOT candidate optical counterpart
  47. GRB 050712: Swift detection of a weak burst
  48. GRB 050709: LCO40 Observations
  49. GRB050709, optical observations
  50. GRB050709: A Possible Short-Hard GRB Localized by HETE
  51. PROMPT Rc Observations of GRB 050709
  52. GRB 050525a: PROMPT VRcIc Detections
  53. GRB 050525a: ARC 3.5-meter Optical and NIR Observations
  54. GRB 050525a: ARC 3.5-Meter SPIcam Field Calibration
  55. GRB 050626 optical observations
  56. GRB 050626: Swift XRT observations
  57. GRB 050701, optical observations
  58. GRB 050408: ARC 3.5-meter NIR Observations
  59. Swift UVOT observations of GRB 050701
  60. GRB050701: Swift-BAT Refined analysis
  61. Swift trigger 143708 is really GRB 050701
  62. GRB 050607, radio observations
  63. H11603: An X-ray flare from V4641 Sgr, or a possible XRF
  64. GRB 050626 - a long GRB detected with INTEGRAL
  65. GRB 050525A: Swift Late-Time Decay Rate
  66. GRB050525a: HST Observations
  67. CORRECTION: GRB050603 Swift UVOT Afterglow Observations
  68. H3804: A Possible New XRB Detected by HETE
  69. H3800 and H3801 on 2005 June 11: two bursts from SGR1806-20 localized by HETE
  70. XRF 050509c: Optical monitoring
  71. Konus-Wind observation of an intermediate burst from SGR 1806-20
  72. XRF050509c: Radio Detection
  73. GRB 050416(a): Host Galaxy Redshift Determination
  74. GRB 050607: MDM Observation
  75. GRB 050607 optical decay
  76. GRB 050607: RTT150 optical observations
  77. GRB050607: refined analysis of prompt REM observations
  78. Swift/UVOT observations of GRB050607
  79. GRB 050607 : Lulin R-band observation
  80. GRB 050607: PROMPT VRcIc Observations
  81. GRB 050607: RAPTOR-S Early Optical Limits
  82. GRB050607: KAIT optical limits
  83. GRB 050525a, Mid-Infrared Observations
  84. GRB 050607: Optical decay and spectral slope
  85. GRB 050607: MDM Observations
  86. GRB050607,optical observation
  87. GRB 050607 - XRT refined data analysis
  88. Optical Afterglow of GRB 050607
  89. GRB050607: Swift Detection of a long GRB
  90. GRB050607: P60 Observations
  91. GRB050607: prompt REM observations
  92. GRB 050603: prediction of t_break
  93. Limits on a SN in the field of GRB 050509b
  94. GRB 050603: Redshift
  95. GRB 050603 - XRT data analysis of the first day
  96. GRB 050603: Analysis of UVOT data
  97. GRB050603: Fading Afterglow observed by Swift UVOT
  98. GRB050603, submillimetre observations
  99. GRB 050603: Swift XRT Position
  100. GRB050603: Radio Detection

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