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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"

32716 results found.

  1. GRB050715: Refined analysis of the Swift-BAT burst
  2. Swift UVOT Observations of GRB 050714B
  3. Konus-Wind observation of GRB 050713A
  4. GRB 050714B: refined XRT analysis
  5. GRB 050713b: RTT150 optical observations
  6. GRB 050714B: candidate afterglow does not fade
  7. GRB050714B: Refined analysis of the Swift-BAT burst
  8. GRB 050714B: optical afterglow
  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 050714A: ROTSE-III Optical Limits
  14. GRB 050713A: XRT refined analysis
  15. GRB 050709: Spectroscopy
  16. GRB 050713A: RAPTOR detection of early optical emission
  17. GRB050713B :Swift/UVOT observations
  18. GRB050713b: XRT refined analysis
  19. GRB050712: TNG R-band observations
  20. GRB 050713B: Swift-BAT Refined Analysis
  21. Swift-BAT Trigger 145729 is not a GRB
  22. GRB 050713A: Swift/UVOT observation
  23. GRB 050713A : Swift-BAT Refined Analysis
  24. GRB050712: Swift UVOT Observation of Afterglow Emission
  25. GRB 050713A XMM-Newton observation
  26. GRB 050713b : Lulin R-band observations
  27. GRB050713B: Faulkes North Telescope observation
  28. RBO RI observations of GRB 050713A
  29. GRB050709 : Chandra source optical counterpart
  30. GRB050713: Liverpool Telescope prompt observations
  31. GRB 050712, optical observations
  32. GRB050709: Candidate X-ray Afterglow from Chandra
  33. GRB 050713: ARC NIR Detections and Identification of Fading
  34. GRB050713: possible I-band afterglow
  35. GRB 050713A: ROTSE-III Optical Limits
  36. GRB050712: XRT refined analysis
  37. GRB050709: Radio Observations
  38. GRB 050709: Swift UVOT and XRT observations
  39. GRB 050712: Swift-BAT Refined Analysis
  40. GRB050712: UVOT candidate optical counterpart
  41. GRB 050712: Swift XRT afterglow position
  42. GRB 050709: LCO40 Observations
  43. GRB050709, optical observations
  44. GRB050709: A Possible Short-Hard GRB Localized by HETE
  45. GRB 050525a: PROMPT VRcIc Detections
  46. GRB 050525a: ARC 3.5-meter Optical and NIR Observations
  47. GRB 050626 optical 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. GRB 050607, radio observations
  56. H11603: An X-ray flare from V4641 Sgr, or a possible XRF
  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. GRB050525a: HST Observations
  61. CORRECTION: GRB050603 Swift UVOT Afterglow Observations
  62. H3800 and H3801 on 2005 June 11: two bursts from SGR1806-20 localized by HETE
  63. XRF 050509c: Optical monitoring
  64. XRF050509c: Radio Detection
  65. GRB 050416(a): Host Galaxy Redshift Determination
  66. GRB 050607: MDM Observation
  67. GRB 050607: RTT150 optical observations
  68. GRB050607: refined analysis of prompt REM observations
  69. Swift/UVOT observations of GRB050607
  70. GRB 050607 : Lulin R-band observation
  71. GRB 050607: PROMPT VRcIc Observations
  72. GRB 050607: RAPTOR-S Early Optical Limits
  73. GRB050607: KAIT optical limits
  74. GRB 050525a, Mid-Infrared Observations
  75. GRB 050607: MDM Observations
  76. GRB050607,optical observation
  77. GRB 050607 - XRT refined data analysis
  78. GRB 050603: prediction of t_break
  79. Limits on a SN in the field of GRB 050509b
  80. GRB 050603: Redshift
  81. GRB 050603 - XRT data analysis of the first day
  82. Konus-Wind observation of GRB 050603
  83. GRB 050603: Analysis of UVOT data
  84. GRB050603: Fading Afterglow observed by Swift UVOT
  85. GRB050603, submillimetre observations
  86. GRB 050603: Swift XRT Position
  87. GRB050603: Radio Detection
  88. GRB 050603: Swift-BAT refined analysis of a long three-spiked burst
  89. GRB 050603: Afterglow Identification from LCO
  90. GRB 050603: INTEGRAL shows it is not a short GRB
  91. GRB 050408: jet break in the XRT light curve
  92. GRB 050525a, infrared observations
  93. GRB 050525a, SMARTS optical/IR afterglow observations
  94. Correction to GCN Circ 3502 on GRB 050528
  95. Swift-BAT GRB 050528: a soft burst
  96. Update on Swift-BAT GRB 050528 (Trigger 130679)
  97. GRB050528: BOOTES optical candidate (retraction)
  98. GRB050504: Ashra-P2/3 monitor and Ashra-AFT response
  99. GRB050525a: Radio Observations
  100. GRB 050509b: refined XRT/Chandra afterglow position analysis

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