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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"

38646 results found.

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

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