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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"

32710 results found.

  1. GRB050714B: Refined analysis of the Swift-BAT burst
  2. GRB 050714B: optical afterglow
  3. GRB 050709: optical afterglow candidate
  4. GRB 050714, R-band candidate
  5. GRB 050714: Swift XRT afterglow position
  6. GRB 050714, optical observations
  7. GRB 050714A: ROTSE-III Optical Limits
  8. GRB 050713A: XRT refined analysis
  9. GRB 050709: Spectroscopy
  10. GRB 050713A: RAPTOR detection of early optical emission
  11. GRB050713B :Swift/UVOT observations
  12. GRB050713b: XRT refined analysis
  13. GRB050712: TNG R-band observations
  14. GRB 050713B: Swift-BAT Refined Analysis
  15. Swift-BAT Trigger 145729 is not a GRB
  16. GRB 050713A: Swift/UVOT observation
  17. GRB 050713A : Swift-BAT Refined Analysis
  18. GRB050712: Swift UVOT Observation of Afterglow Emission
  19. GRB 050713A XMM-Newton observation
  20. GRB 050713b : Lulin R-band observations
  21. GRB050713B: Faulkes North Telescope observation
  22. RBO RI observations of GRB 050713A
  23. GRB050709 : Chandra source optical counterpart
  24. GRB050713: Liverpool Telescope prompt observations
  25. GRB 050712, optical observations
  26. GRB050709: Candidate X-ray Afterglow from Chandra
  27. GRB 050713: ARC NIR Detections and Identification of Fading
  28. GRB050713: possible I-band afterglow
  29. GRB 050713A: ROTSE-III Optical Limits
  30. GRB050712: XRT refined analysis
  31. GRB050709: Radio Observations
  32. GRB 050709: Swift UVOT and XRT observations
  33. GRB 050712: Swift-BAT Refined Analysis
  34. GRB050712: UVOT candidate optical counterpart
  35. GRB 050712: Swift XRT afterglow position
  36. GRB 050709: LCO40 Observations
  37. GRB050709, optical observations
  38. GRB050709: A Possible Short-Hard GRB Localized by HETE
  39. GRB 050525a: PROMPT VRcIc Detections
  40. GRB 050525a: ARC 3.5-meter Optical and NIR Observations
  41. GRB 050626 optical observations
  42. GRB 050701
  43. GRB 050701, optical observations
  44. GRB 050408: ARC 3.5-meter NIR Observations
  45. GRB 050701: Refined XRT analysis
  46. Swift UVOT observations of GRB 050701
  47. GRB050701: Swift-BAT Refined analysis
  48. GRB 050701: Swift XRT afterglow position
  49. GRB 050607, radio observations
  50. H11603: An X-ray flare from V4641 Sgr, or a possible XRF
  51. GRB 050626 - Correction to GCN 3552
  52. GRB 050626 - a long GRB detected with INTEGRAL
  53. GRB 050525A: Swift Late-Time Decay Rate
  54. GRB050525a: HST Observations
  55. CORRECTION: GRB050603 Swift UVOT Afterglow Observations
  56. H3800 and H3801 on 2005 June 11: two bursts from SGR1806-20 localized by HETE
  57. XRF 050509c: Optical monitoring
  58. XRF050509c: Radio Detection
  59. GRB 050416(a): Host Galaxy Redshift Determination
  60. GRB 050607: MDM Observation
  61. GRB 050607: RTT150 optical observations
  62. GRB050607: refined analysis of prompt REM observations
  63. Swift/UVOT observations of GRB050607
  64. GRB 050607 : Lulin R-band observation
  65. GRB 050607: PROMPT VRcIc Observations
  66. GRB 050607: RAPTOR-S Early Optical Limits
  67. GRB050607: KAIT optical limits
  68. GRB 050525a, Mid-Infrared Observations
  69. GRB 050607: MDM Observations
  70. GRB050607,optical observation
  71. GRB 050607 - XRT refined data analysis
  72. GRB 050603: prediction of t_break
  73. Limits on a SN in the field of GRB 050509b
  74. GRB 050603: Redshift
  75. GRB 050603 - XRT data analysis of the first day
  76. Konus-Wind observation of GRB 050603
  77. GRB 050603: Analysis of UVOT data
  78. GRB050603: Fading Afterglow observed by Swift UVOT
  79. GRB050603, submillimetre observations
  80. GRB 050603: Swift XRT Position
  81. GRB050603: Radio Detection
  82. GRB 050603: Swift-BAT refined analysis of a long three-spiked burst
  83. GRB 050603: Afterglow Identification from LCO
  84. GRB 050603: INTEGRAL shows it is not a short GRB
  85. GRB 050408: jet break in the XRT light curve
  86. GRB 050525a, infrared observations
  87. GRB 050525a, SMARTS optical/IR afterglow observations
  88. Correction to GCN Circ 3502 on GRB 050528
  89. Swift-BAT GRB 050528: a soft burst
  90. Update on Swift-BAT GRB 050528 (Trigger 130679)
  91. GRB050528: BOOTES optical candidate (retraction)
  92. GRB050504: Ashra-P2/3 monitor and Ashra-AFT response
  93. GRB050525a: Radio Observations
  94. GRB 050509b: refined XRT/Chandra afterglow position analysis
  95. GRB050525a: optical upper limits
  96. GRB 050525a: SARA Observations
  97. GRB 050525B: Swift-BAT observations
  98. GRB 050525: MITSuME Optical Observation in VRI
  99. GRB 050525a: MDM Observations
  100. GRB050525A,optical observation

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