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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"

32720 results found.

  1. GRB050716, optical observation
  2. GRB 050716: Optical Observations
  3. GRB050716: Faulkes North Telescope observation
  4. GRB050716: Correction to sign in XRT coordinate
  5. GRB050715: Refined analysis of the Swift-BAT burst
  6. Swift UVOT Observations of GRB 050714B
  7. Konus-Wind observation of GRB 050713A
  8. GRB 050714B: refined XRT analysis
  9. GRB 050713b: RTT150 optical observations
  10. GRB 050714B: candidate afterglow does not fade
  11. GRB050714B: Refined analysis of the Swift-BAT burst
  12. GRB 050714B: optical afterglow
  13. GRB 050709: optical afterglow candidate
  14. GRB 050714, R-band candidate
  15. GRB 050714: Swift XRT afterglow position
  16. GRB 050714, optical observations
  17. GRB 050714A: ROTSE-III Optical Limits
  18. GRB 050713A: XRT refined analysis
  19. GRB 050709: Spectroscopy
  20. GRB 050713A: RAPTOR detection of early optical emission
  21. GRB050713B :Swift/UVOT observations
  22. GRB050713b: XRT refined analysis
  23. GRB050712: TNG R-band observations
  24. GRB 050713B: Swift-BAT Refined Analysis
  25. Swift-BAT Trigger 145729 is not a GRB
  26. GRB 050713A: Swift/UVOT observation
  27. GRB 050713A : Swift-BAT Refined Analysis
  28. GRB050712: Swift UVOT Observation of Afterglow Emission
  29. GRB 050713A XMM-Newton observation
  30. GRB 050713b : Lulin R-band observations
  31. GRB050713B: Faulkes North Telescope observation
  32. RBO RI observations of GRB 050713A
  33. GRB050709 : Chandra source optical counterpart
  34. GRB050713: Liverpool Telescope prompt observations
  35. GRB 050712, optical observations
  36. GRB050709: Candidate X-ray Afterglow from Chandra
  37. GRB 050713: ARC NIR Detections and Identification of Fading
  38. GRB050713: possible I-band afterglow
  39. GRB 050713A: ROTSE-III Optical Limits
  40. GRB050712: XRT refined analysis
  41. GRB050709: Radio Observations
  42. GRB 050709: Swift UVOT and XRT observations
  43. GRB 050712: Swift-BAT Refined Analysis
  44. GRB050712: UVOT candidate optical counterpart
  45. GRB 050712: Swift XRT afterglow position
  46. GRB 050709: LCO40 Observations
  47. GRB050709, optical observations
  48. GRB050709: A Possible Short-Hard GRB Localized by HETE
  49. GRB 050525a: PROMPT VRcIc Detections
  50. GRB 050525a: ARC 3.5-meter Optical and NIR Observations
  51. GRB 050626 optical observations
  52. GRB 050701
  53. GRB 050701, optical observations
  54. GRB 050408: ARC 3.5-meter NIR Observations
  55. GRB 050701: Refined XRT analysis
  56. Swift UVOT observations of GRB 050701
  57. GRB050701: Swift-BAT Refined analysis
  58. GRB 050701: Swift XRT afterglow position
  59. GRB 050607, radio observations
  60. H11603: An X-ray flare from V4641 Sgr, or a possible XRF
  61. GRB 050626 - Correction to GCN 3552
  62. GRB 050626 - a long GRB detected with INTEGRAL
  63. GRB 050525A: Swift Late-Time Decay Rate
  64. GRB050525a: HST Observations
  65. CORRECTION: GRB050603 Swift UVOT Afterglow Observations
  66. H3800 and H3801 on 2005 June 11: two bursts from SGR1806-20 localized by HETE
  67. XRF 050509c: Optical monitoring
  68. XRF050509c: Radio Detection
  69. GRB 050416(a): Host Galaxy Redshift Determination
  70. GRB 050607: MDM Observation
  71. GRB 050607: RTT150 optical observations
  72. GRB050607: refined analysis of prompt REM observations
  73. Swift/UVOT observations of GRB050607
  74. GRB 050607 : Lulin R-band observation
  75. GRB 050607: PROMPT VRcIc Observations
  76. GRB 050607: RAPTOR-S Early Optical Limits
  77. GRB050607: KAIT optical limits
  78. GRB 050525a, Mid-Infrared Observations
  79. GRB 050607: MDM Observations
  80. GRB050607,optical observation
  81. GRB 050607 - XRT refined data analysis
  82. GRB 050603: prediction of t_break
  83. Limits on a SN in the field of GRB 050509b
  84. GRB 050603: Redshift
  85. GRB 050603 - XRT data analysis of the first day
  86. Konus-Wind observation of GRB 050603
  87. GRB 050603: Analysis of UVOT data
  88. GRB050603: Fading Afterglow observed by Swift UVOT
  89. GRB050603, submillimetre observations
  90. GRB 050603: Swift XRT Position
  91. GRB050603: Radio Detection
  92. GRB 050603: Swift-BAT refined analysis of a long three-spiked burst
  93. GRB 050603: Afterglow Identification from LCO
  94. GRB 050603: INTEGRAL shows it is not a short GRB
  95. GRB 050408: jet break in the XRT light curve
  96. GRB 050525a, infrared observations
  97. GRB 050525a, SMARTS optical/IR afterglow observations
  98. Correction to GCN Circ 3502 on GRB 050528
  99. Swift-BAT GRB 050528: a soft burst
  100. Update on Swift-BAT GRB 050528 (Trigger 130679)

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