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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"

32721 results found.

  1. GRB 050716: Lulin B and R band optical observations
  2. GRB050716, optical observation
  3. GRB 050716: Optical Observations
  4. GRB050716: Faulkes North Telescope observation
  5. GRB050716: Correction to sign in XRT coordinate
  6. GRB050715: Refined analysis of the Swift-BAT burst
  7. Swift UVOT Observations of GRB 050714B
  8. Konus-Wind observation of GRB 050713A
  9. GRB 050714B: refined XRT analysis
  10. GRB 050713b: RTT150 optical observations
  11. GRB 050714B: candidate afterglow does not fade
  12. GRB050714B: Refined analysis of the Swift-BAT burst
  13. GRB 050714B: optical afterglow
  14. GRB 050709: optical afterglow candidate
  15. GRB 050714, R-band candidate
  16. GRB 050714: Swift XRT afterglow position
  17. GRB 050714, optical observations
  18. GRB 050714A: ROTSE-III Optical Limits
  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. Swift-BAT Trigger 145729 is not a GRB
  27. GRB 050713A: Swift/UVOT observation
  28. GRB 050713A : Swift-BAT Refined Analysis
  29. GRB050712: Swift UVOT Observation of Afterglow Emission
  30. GRB 050713A XMM-Newton observation
  31. GRB 050713b : Lulin R-band observations
  32. GRB050713B: Faulkes North Telescope observation
  33. RBO RI observations of GRB 050713A
  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: ARC NIR Detections and Identification of Fading
  39. GRB050713: possible I-band afterglow
  40. GRB 050713A: ROTSE-III Optical Limits
  41. GRB050712: XRT refined analysis
  42. GRB050709: Radio Observations
  43. GRB 050709: Swift UVOT and XRT observations
  44. GRB 050712: Swift-BAT Refined Analysis
  45. GRB050712: UVOT candidate optical counterpart
  46. GRB 050712: Swift XRT afterglow position
  47. GRB 050709: LCO40 Observations
  48. GRB050709, optical observations
  49. GRB050709: A Possible Short-Hard GRB Localized by HETE
  50. GRB 050525a: PROMPT VRcIc Detections
  51. GRB 050525a: ARC 3.5-meter Optical and NIR Observations
  52. GRB 050626 optical observations
  53. GRB 050701
  54. GRB 050701, optical observations
  55. GRB 050408: ARC 3.5-meter NIR Observations
  56. GRB 050701: Refined XRT analysis
  57. Swift UVOT observations of GRB 050701
  58. GRB050701: Swift-BAT Refined analysis
  59. GRB 050701: Swift XRT afterglow position
  60. GRB 050607, radio observations
  61. H11603: An X-ray flare from V4641 Sgr, or a possible XRF
  62. GRB 050626 - Correction to GCN 3552
  63. GRB 050626 - a long GRB detected with INTEGRAL
  64. GRB 050525A: Swift Late-Time Decay Rate
  65. GRB050525a: HST Observations
  66. CORRECTION: GRB050603 Swift UVOT Afterglow Observations
  67. H3800 and H3801 on 2005 June 11: two bursts from SGR1806-20 localized by HETE
  68. XRF 050509c: Optical monitoring
  69. XRF050509c: Radio Detection
  70. GRB 050416(a): Host Galaxy Redshift Determination
  71. GRB 050607: MDM Observation
  72. GRB 050607: RTT150 optical observations
  73. GRB050607: refined analysis of prompt REM observations
  74. Swift/UVOT observations of GRB050607
  75. GRB 050607 : Lulin R-band observation
  76. GRB 050607: PROMPT VRcIc Observations
  77. GRB 050607: RAPTOR-S Early Optical Limits
  78. GRB050607: KAIT optical limits
  79. GRB 050525a, Mid-Infrared Observations
  80. GRB 050607: MDM Observations
  81. GRB050607,optical observation
  82. GRB 050607 - XRT refined data analysis
  83. GRB 050603: prediction of t_break
  84. Limits on a SN in the field of GRB 050509b
  85. GRB 050603: Redshift
  86. GRB 050603 - XRT data analysis of the first day
  87. Konus-Wind observation of GRB 050603
  88. GRB 050603: Analysis of UVOT data
  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. GRB 050408: jet break in the XRT light curve
  97. GRB 050525a, infrared observations
  98. GRB 050525a, SMARTS optical/IR afterglow observations
  99. Correction to GCN Circ 3502 on GRB 050528
  100. Swift-BAT GRB 050528: a soft burst

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