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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"

42870 results found.

  1. Swift UVOT Observations of GRB 050714B
  2. Konus-Wind observation of GRB 050713A
  3. GRB 050714B: refined XRT analysis
  4. GRB 050713b: RTT150 optical observations
  5. GRB 050714B: candidate afterglow does not fade
  6. GRB050714B: Refined analysis of the Swift-BAT burst
  7. GRB 050714B: optical afterglow
  8. Swift detection of a long transient (GRB 050714B?)
  9. GRB 050709: optical afterglow candidate
  10. GRB 050714, R-band candidate
  11. GRB 050714: Swift XRT afterglow position
  12. GRB 050714, optical observations
  13. GRB 050714 - A long GRB detected with INTEGRAL
  14. GRB 050713A: XRT refined analysis
  15. GRB 050709: Spectroscopy
  16. GRB 050713A: RAPTOR detection of early optical emission
  17. GRB050713b: XRT refined analysis
  18. GRB050712: TNG R-band observations
  19. GRB 050713B: Swift-BAT Refined Analysis
  20. Swift-BAT Trigger 145729 is not a GRB
  21. GRB 050713A: Swift/UVOT observation
  22. GRB 050713A : Swift-BAT Refined Analysis
  23. GRB050712: Swift UVOT Observation of Afterglow Emission
  24. GRB 050713A XMM-Newton observation
  25. GRB050713B: Faulkes North Telescope observation
  26. RBO RI observations of GRB 050713A
  27. GRB 050713B
  28. GRB050713: Liverpool Telescope prompt observations
  29. GRB 050712, optical observations
  30. GRB050709: Candidate X-ray Afterglow from Chandra
  31. GRB 050713, R-band observations at NOT
  32. GRB050713: possible I-band afterglow
  33. GRB 050713: Swift detection of Bright Burst
  34. GRB050712: XRT refined analysis
  35. GRB050709: Radio Observations
  36. GRB 050709: Swift UVOT and XRT observations
  37. GRB 050712: Swift-BAT Refined Analysis
  38. GRB050712: UVOT candidate optical counterpart
  39. GRB 050712: Swift XRT afterglow position
  40. GRB 050712: Swift detection of a weak burst
  41. GRB 050709: LCO40 Observations
  42. GRB050709, optical observations
  43. GRB050709: A Possible Short-Hard GRB Localized by HETE
  44. PROMPT Rc Observations of GRB 050709
  45. GRB 050525a: PROMPT VRcIc Detections
  46. GRB 050525a: ARC 3.5-meter Optical and NIR Observations
  47. GRB 050525a: ARC 3.5-Meter SPIcam Field Calibration
  48. GRB 050626 optical observations
  49. GRB 050626: Swift XRT observations
  50. GRB 050701, optical observations
  51. GRB 050408: ARC 3.5-meter NIR Observations
  52. GRB 050701: Refined XRT analysis
  53. Swift UVOT observations of GRB 050701
  54. GRB050701: Swift-BAT Refined analysis
  55. GRB 050701: Swift XRT afterglow position
  56. Swift trigger 143708 is really GRB 050701
  57. GRB 050607, radio observations
  58. H11603: An X-ray flare from V4641 Sgr, or a possible XRF
  59. GRB 050626 - a long GRB detected with INTEGRAL
  60. GRB 050525A: Swift Late-Time Decay Rate
  61. GRB050525a: HST Observations
  62. CORRECTION: GRB050603 Swift UVOT Afterglow Observations
  63. H3804: A Possible New XRB Detected by HETE
  64. H3800 and H3801 on 2005 June 11: two bursts from SGR1806-20 localized by HETE
  65. XRF 050509c: Optical monitoring
  66. Konus-Wind observation of an intermediate burst from SGR 1806-20
  67. IBAS Alert #2512 is NOT a GRB
  68. XRF050509c: Radio Detection
  69. GRB 050416(a): Host Galaxy Redshift Determination
  70. GRB 050607: MDM Observation
  71. GRB 050607 optical decay
  72. GRB 050607: RTT150 optical observations
  73. GRB050607: refined analysis of prompt REM observations
  74. Swift/UVOT observations of GRB050607
  75. GRB 050607: PROMPT VRcIc Observations
  76. GRB050607: KAIT optical limits
  77. GRB 050525a, Mid-Infrared Observations
  78. GRB 050607: Optical decay and spectral slope
  79. GRB 050607 - XRT refined data analysis
  80. Optical Afterglow of GRB 050607
  81. GRB050607: Swift Detection of a long GRB
  82. GRB050607: P60 Observations
  83. GRB050607: prompt REM observations
  84. GRB 050603: prediction of t_break
  85. Limits on a SN in the field of GRB 050509b
  86. GRB 050603: Redshift
  87. GRB 050603 - XRT data analysis of the first day
  88. Konus-Wind observation of GRB 050603
  89. GRB050603: Fading Afterglow observed by Swift UVOT
  90. GRB050603, submillimetre observations
  91. GRB 050603: Swift XRT Position
  92. GRB050603: Radio Detection
  93. GRB 050603: Swift-BAT refined analysis of a long three-spiked burst
  94. GRB 050603: Afterglow Identification from LCO
  95. GRB 050603: INTEGRAL shows it is not a short GRB
  96. Swift/BAT Detection of GRB050603
  97. GRB 050408: jet break in the XRT light curve
  98. GRB 050525a, infrared observations
  99. GRB 050525a, SMARTS optical/IR afterglow observations
  100. GRB050528, XRT observations

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