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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"

36079 results found.

  1. GRB050730: Swift-BAT detection of a weak burst
  2. GRB 050713A: Swift XRT extended light curve
  3. GRB 050709: PROMPT Rc Observations
  4. GRB050713b: Maidanak optical observations
  5. GRB 050724: Secure Host Redshift from Keck
  6. GRB 050724: WHT optical observations
  7. GRB 050724: Chandra Observations of the X-ray Afterglow
  8. GRB050713: analysis of the XMM-Newton observation
  9. GRB 050724, SMARTS optical/IR afterglow observations
  10. GRB 050726, SMARTS optical/IR observations
  11. Swift-BAT trigger 147918 is not a real GRB
  12. GRB 050727: RTT150 optical observations
  13. GRB050727: KAIT optical limit
  14. GRB050709: Second Epoch Chandra Observation
  15. GRB 050726: PROMPT Rc Observations
  16. GRB050709: Second Epoch Chandra Observation
  17. GRB 050724: dust-scattered X-ray halo detected in SWIFT/XRT observation
  18. GRB 050726: early Swift XRT analysis results
  19. GRB 050724: Optical Variability in Nearby Galaxy
  20. GRB 050724: J-band observations
  21. GRB 050724: GMOS Imaging and Spectroscopy
  22. GRB 050724: SWIFT XRT refined position
  23. GRB 050724: spectroscopy of object in the XRT error circle
  24. GRB 050724: Optical limit
  25. GRB 050724: optical and near-IR observations
  26. GRB 050724: Optical imaging/astrometry
  27. GRB 050724: RTT150 optical observations
  28. GRB 050724: Swift/UVOT Upper Limit
  29. GRB 050724: early Swift XRT analysis results
  30. GRB 050724 : Lulin early R-band monitoring observations
  31. GRB050724: Refined analysis of the Swift-BAT possible short burst
  32. GRB 050724: possible host galaxy in DSS
  33. Swift-BAT trigger 147325 is not due to a real GRB
  34. GRB050723: XRT distributed coordinates are not related to the burst
  35. GRB 050721: early afterglow light curve
  36. GRB 050721A: Swift-BAT refined analysis
  37. Correction to GCN Circ 3474 on GRB050525A
  38. GRB 050721A: Early Swift XRT analysis results
  39. GRB050721A: optical decay
  40. GRB 050721: optical afterglow confirmed
  41. Swift BAT Trigger 146986 is SWIFT J1753.5-0127
  42. GRB 050721a: Optical Observations
  43. GRB 050709: Refined Spectral and Temporal Properties
  44. GRB 050717: PROMPT RcIc Observations
  45. GRB 050714a: Refined XRT analysis and afterglow confirmation
  46. Swift-BAT trigger 146731 is not a real GRB
  47. GRB 050712, Tautenburg optical afterglow observations
  48. Swift-BAT detection of a possible GRB
  49. GRB 050714B: VLT R-band observations
  50. GRB 050717: Additional LCO observations
  51. GRB050717
  52. GRB 050716; J-band observations
  53. Konus-Wind observation of GRB 050717
  54. GRB 050717: LCO near-IR observations
  55. Swift/UVOT Observations of GRB 050717
  56. GRB 050717: Swift-BAT refined analysis
  57. GRB 050717: Refined XRT analysis.
  58. GRB050712: optical limits
  59. Swift detection of GRB 050717
  60. GRB 050716 - UKIRT identification of candidate afterglow
  61. Swift UVOT Observations of GRB 050716
  62. GRB 050716: Refined XRT analysis.
  63. GRB 050716: Lulin B and R band optical observations
  64. GRB050716, optical observation
  65. GRB 050716: Optical Observations
  66. GRB050716: Faulkes North Telescope observation
  67. Swift/BAT detection of GRB 050716
  68. GRB 050715: Swift-BAT detection
  69. Swift UVOT Observations of GRB 050714B
  70. Konus-Wind observation of GRB 050713A
  71. GRB 050714B: refined XRT analysis
  72. GRB 050713b: RTT150 optical observations
  73. GRB 050714B: candidate afterglow does not fade
  74. GRB050714B: Refined analysis of the Swift-BAT burst
  75. GRB 050714B: optical afterglow
  76. Swift detection of a long transient (GRB 050714B?)
  77. GRB 050709: optical afterglow candidate
  78. GRB 050714, R-band candidate
  79. GRB 050714: Swift XRT afterglow position
  80. GRB 050714, optical observations
  81. GRB 050714A: ROTSE-III Optical Limits
  82. GRB 050714 - A long GRB detected with INTEGRAL
  83. GRB 050713A: XRT refined analysis
  84. GRB 050709: Spectroscopy
  85. GRB 050713A: RAPTOR detection of early optical emission
  86. GRB050713B :Swift/UVOT observations
  87. GRB050712: TNG R-band observations
  88. GRB 050713B: Swift-BAT Refined Analysis
  89. Swift-BAT Trigger 145729 is not a GRB
  90. GRB 050713A: Swift/UVOT observation
  91. GRB 050713A : Swift-BAT Refined Analysis
  92. GRB 050713A : Lulin R-band observation
  93. GRB 050713A XMM-Newton observation
  94. GRB 050713b : Lulin R-band observations
  95. GRB050713B: Faulkes North Telescope observation
  96. RBO RI observations of GRB 050713A
  97. GRB 050713B
  98. GRB050709 : Chandra source optical counterpart
  99. GRB050713: Liverpool Telescope prompt observations
  100. GRB 050712, optical observations

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