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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"

38642 results found.

  1. GRB050726: Swift UVOT observations
  2. GRB 050724: Chandra Observations of the X-ray Afterglow
  3. GRB050724: Refined Radio Position
  4. GRB050713: analysis of the XMM-Newton observation
  5. GRB 050724, SMARTS optical/IR afterglow observations
  6. GRB 050726, SMARTS optical/IR observations
  7. Swift-BAT trigger 147918 is not a real GRB
  8. GRB050724: VLT observations of the variable source
  9. GRB050727: KAIT optical limit
  10. GRB050709: Second Epoch Chandra Observation
  11. GRB 050726: PROMPT Rc Observations
  12. GRB050709: Second Epoch Chandra Observation
  13. GRB050724: Further Radio Observations
  14. GRB 050726: early Swift XRT analysis results
  15. GRB050726: Swift-BAT detection of a weak burst
  16. GRB 050724: Optical Variability in Nearby Galaxy
  17. GRB 050724: J-band observations
  18. GRB 050724: GMOS Imaging and Spectroscopy
  19. GRB 050724: SWIFT XRT refined position
  20. GRB050724: Radio Observation
  21. GRB 050724: spectroscopy of object in the XRT error circle
  22. GRB 050724: Optical limit
  23. GRB 050724: optical and near-IR observations
  24. GRB 050724: Optical imaging/astrometry
  25. GRB 050724: Swift/UVOT Upper Limit
  26. GRB 050724: early Swift XRT analysis results
  27. GRB 050724 : Lulin early R-band monitoring observations
  28. GRB050724: Refined analysis of the Swift-BAT possible short burst
  29. GRB 050724: possible host galaxy in DSS
  30. GRB050724: a short-burst detected by Swift
  31. Swift-BAT trigger 147325 is not due to a real GRB
  32. GRB050723: XRT distributed coordinates are not related to the burst
  33. GRB 050721: early afterglow light curve
  34. GRB 050721A: Swift-BAT refined analysis
  35. Correction to GCN Circ 3474 on GRB050525A
  36. GRB 050721A: Early Swift XRT analysis results
  37. GRB050721A: optical decay
  38. GRB 050721: optical afterglow confirmed
  39. Swift BAT Trigger 146986 is SWIFT J1753.5-0127
  40. GRB050721A: Swift-BAT detection of a weak burst
  41. GRB 050709: Refined Spectral and Temporal Properties
  42. GRB 050717: PROMPT RcIc Observations
  43. GRB050714b: Radio Observation
  44. GRB050712: Radio Observations
  45. GRB 050714a: Refined XRT analysis and afterglow confirmation
  46. GRB050713a: Radio Observation
  47. Swift-BAT trigger 146731 is not a real GRB
  48. Swift-BAT detection of a possible GRB
  49. GRB 050717: Additional LCO observations
  50. GRB050717
  51. GRB 050716; J-band observations
  52. Konus-Wind observation of GRB 050717
  53. GRB 050717: LCO near-IR observations
  54. Swift/UVOT Observations of GRB 050717
  55. GRB 050717: Swift-BAT refined analysis
  56. GRB050712: optical limits
  57. Swift detection of GRB 050717
  58. Swift UVOT Observations of GRB 050716
  59. GRB050716: Refined analysis of the Swift-BAT burst
  60. GRB 050716: Lulin B and R band optical observations
  61. GRB050716, optical observation
  62. GRB 050716: Optical Observations
  63. GRB050716: Faulkes North Telescope observation
  64. GRB050716: Correction to sign in XRT coordinate
  65. Swift/BAT detection of GRB 050716
  66. GRB050715: Refined analysis of the Swift-BAT burst
  67. GRB 050715: Swift-BAT detection
  68. Swift UVOT Observations of GRB 050714B
  69. Konus-Wind observation of GRB 050713A
  70. GRB 050713b: RTT150 optical observations
  71. GRB 050714B: candidate afterglow does not fade
  72. GRB050714B: Refined analysis of the Swift-BAT burst
  73. GRB 050714B: optical afterglow
  74. Swift detection of a long transient (GRB 050714B?)
  75. GRB 050709: optical afterglow candidate
  76. GRB 050714, R-band candidate
  77. GRB 050714: Swift XRT afterglow position
  78. GRB 050714, optical observations
  79. GRB 050714A: ROTSE-III Optical Limits
  80. GRB 050714 - A long GRB detected with INTEGRAL
  81. GRB 050713A: XRT refined analysis
  82. GRB 050709: Spectroscopy
  83. GRB 050713A: RAPTOR detection of early optical emission
  84. GRB050713B :Swift/UVOT observations
  85. GRB050713b: XRT refined analysis
  86. GRB050712: TNG R-band observations
  87. GRB 050713B: Swift-BAT Refined Analysis
  88. Swift-BAT Trigger 145729 is not a GRB
  89. GRB 050713A: Swift/UVOT observation
  90. GRB 050713A : Swift-BAT Refined Analysis
  91. GRB050712: Swift UVOT Observation of Afterglow Emission
  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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