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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"

32722 results found.

  1. GRB050716: Refined analysis of the Swift-BAT burst
  2. GRB 050716: Lulin B and R band optical observations
  3. GRB050716, optical observation
  4. GRB 050716: Optical Observations
  5. GRB050716: Faulkes North Telescope observation
  6. GRB050716: Correction to sign in XRT coordinate
  7. GRB050715: Refined analysis of the Swift-BAT burst
  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. GRB 050709: optical afterglow candidate
  16. GRB 050714, R-band candidate
  17. GRB 050714: Swift XRT afterglow position
  18. GRB 050714, optical observations
  19. GRB 050714A: ROTSE-III Optical Limits
  20. GRB 050713A: XRT refined analysis
  21. GRB 050709: Spectroscopy
  22. GRB 050713A: RAPTOR detection of early optical emission
  23. GRB050713B :Swift/UVOT observations
  24. GRB050713b: XRT refined analysis
  25. GRB050712: TNG R-band observations
  26. GRB 050713B: Swift-BAT Refined Analysis
  27. Swift-BAT Trigger 145729 is not a GRB
  28. GRB 050713A: Swift/UVOT observation
  29. GRB 050713A : Swift-BAT Refined Analysis
  30. GRB050712: Swift UVOT Observation of Afterglow Emission
  31. GRB 050713A XMM-Newton observation
  32. GRB 050713b : Lulin R-band observations
  33. GRB050713B: Faulkes North Telescope observation
  34. RBO RI observations of GRB 050713A
  35. GRB050709 : Chandra source optical counterpart
  36. GRB050713: Liverpool Telescope prompt observations
  37. GRB 050712, optical observations
  38. GRB050709: Candidate X-ray Afterglow from Chandra
  39. GRB 050713: ARC NIR Detections and Identification of Fading
  40. GRB050713: possible I-band afterglow
  41. GRB 050713A: ROTSE-III Optical Limits
  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 XRT afterglow position
  48. GRB 050709: LCO40 Observations
  49. GRB050709, optical observations
  50. GRB050709: A Possible Short-Hard GRB Localized by HETE
  51. GRB 050525a: PROMPT VRcIc Detections
  52. GRB 050525a: ARC 3.5-meter Optical and NIR Observations
  53. GRB 050626 optical observations
  54. GRB 050701
  55. GRB 050701, optical observations
  56. GRB 050408: ARC 3.5-meter NIR Observations
  57. GRB 050701: Refined XRT analysis
  58. Swift UVOT observations of GRB 050701
  59. GRB050701: Swift-BAT Refined analysis
  60. GRB 050701: Swift XRT afterglow position
  61. GRB 050607, radio observations
  62. H11603: An X-ray flare from V4641 Sgr, or a possible XRF
  63. GRB 050626 - Correction to GCN 3552
  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. H3800 and H3801 on 2005 June 11: two bursts from SGR1806-20 localized by HETE
  69. XRF 050509c: Optical monitoring
  70. XRF050509c: Radio Detection
  71. GRB 050416(a): Host Galaxy Redshift Determination
  72. GRB 050607: MDM Observation
  73. GRB 050607: RTT150 optical observations
  74. GRB050607: refined analysis of prompt REM observations
  75. Swift/UVOT observations of GRB050607
  76. GRB 050607 : Lulin R-band observation
  77. GRB 050607: PROMPT VRcIc Observations
  78. GRB 050607: RAPTOR-S Early Optical Limits
  79. GRB050607: KAIT optical limits
  80. GRB 050525a, Mid-Infrared Observations
  81. GRB 050607: MDM Observations
  82. GRB050607,optical observation
  83. GRB 050607 - XRT refined data analysis
  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. GRB 050603: Analysis of UVOT data
  90. GRB050603: Fading Afterglow observed by Swift UVOT
  91. GRB050603, submillimetre observations
  92. GRB 050603: Swift XRT Position
  93. GRB050603: Radio Detection
  94. GRB 050603: Swift-BAT refined analysis of a long three-spiked burst
  95. GRB 050603: Afterglow Identification from LCO
  96. GRB 050603: INTEGRAL shows it is not a short GRB
  97. GRB 050408: jet break in the XRT light curve
  98. GRB 050525a, infrared observations
  99. GRB 050525a, SMARTS optical/IR afterglow observations
  100. Correction to GCN Circ 3502 on GRB 050528

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