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GCN Circulars

GCN Circulars are rapid astronomical bulletins submitted by and distributed to community members worldwide. They are used to share discoveries, observations, quantitative near-term predictions, requests for follow-up observations, or future observing plans related to high-energy, multi-messenger, and variable or transient astrophysical events. 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').

17198 results found.

  1. GRB 050805b: TAROT optical limits
  2. GRB050805b: MASTER optical observations
  3. Possible GRB 050805B: Swift-BAT trigger 149131 may be a burst
  4. GRB050805a: MASTER optical candidat
  5. Swift-BAT trigger 149118 is probably not a GRB
  6. GRB050803: Optical/UV Upper Limits from Swift-UVOT
  7. GRB 050803: Swift-BAT refined analysis
  8. GRB050803: MASTER further analys
  9. GRB 050803: early Swift XRT analysis results
  10. GRB 050803: TAROT optical limits
  11. GRB050803: MASTER optical observations
  12. GRB050803: Swift-BAT detection of a very long burst
  13. GCN GRB observation 050713A
  14. GRB 050802: Swift/UVOT optical and UV detections
  15. GRB050802 radio non-detection
  16. GRB 050730: OHP optical observations
  17. GRB 050802: early Swift XRT analysis results
  18. GRB 050802: Swift/UVOT observations
  19. GRB 050802: Swift-BAT refined analysis
  20. GRB 050802: XRT position
  21. GRB 050802: Swift Gamma-ray Burst
  22. GRB050801: Swift/UVOT Optical and UV detections
  23. GCN 050801: early Swift XRT analysis results
  24. GRB 050801: Swift-BAT refined analysis
  25. GRB 050801, afterglow observations
  26. GRB 050730, corrected photometry and break?
  27. GRB 050801: ROTSE-III Early Afterglow Break
  28. GRB050801: Swift-BAT detection of a burst
  29. GRB050801: GCN XRT position is incorrect
  30. GRB 050801: ROTSE-III Detection of Possible Counterpart
  31. GRB 050730: XRT refined analysis
  32. GRB 050730: early TAROT optical observations
  33. Swift/UVOT photometry of GRB050730
  34. GRB050730: Refined BAT analysis of the Swift-BAT burst
  35. GRB 050730: Swift XRT afterglow observations
  36. GRB 050730 XMM-Newton observation
  37. GRB050730, afterglow observations
  38. GRB 050730: Redshift Measurement based on Magellan/MIKE Observations
  39. GRB050730: Liverpool Telescope optical observations
  40. GRB 050730, optical candidate
  41. GRB050730: Swift-BAT detection of a weak burst
  42. GRB 050713A: Swift XRT extended light curve
  43. GRB050726: Swift UVOT observations
  44. GRB 050724: Chandra Observations of the X-ray Afterglow
  45. GRB050713: analysis of the XMM-Newton observation
  46. Swift-BAT trigger 147918 is not a real GRB
  47. GRB 050727: RTT150 optical observations
  48. GRB050727: KAIT optical limit
  49. GRB 050724: dust-scattered X-ray halo detected in SWIFT/XRT observation
  50. GRB 050726: early Swift XRT analysis results
  51. GRB050726: Swift-BAT detection of a weak burst
  52. GRB 050724: SWIFT XRT refined position
  53. GRB 050724: optical and near-IR observations
  54. GRB 050724: Swift/UVOT Upper Limit
  55. GRB 050724: early Swift XRT analysis results
  56. GRB050724: Refined analysis of the Swift-BAT possible short burst
  57. GRB050724: a short-burst detected by Swift
  58. Swift-BAT trigger 147325 is not due to a real GRB
  59. GRB050723: XRT distributed coordinates are not related to the burst
  60. GRB 050721A: Swift-BAT refined analysis
  61. GRB 050721A: Early Swift XRT analysis results
  62. Swift BAT Trigger 146986 is SWIFT J1753.5-0127
  63. GRB 050721a: Optical Observations
  64. GRB050721A: Swift-BAT detection of a weak burst
  65. GRB 050714a: Refined XRT analysis and afterglow confirmation
  66. Swift-BAT trigger 146731 is not a real GRB
  67. Swift-BAT detection of a possible GRB
  68. GRB050717
  69. Konus-Wind observation of GRB 050717
  70. Swift/UVOT Observations of GRB 050717
  71. GRB 050717: Swift-BAT refined analysis
  72. GRB 050717: Refined XRT analysis.
  73. GRB050712: optical limits
  74. GRB050717: Swift XRT position
  75. Swift detection of GRB 050717
  76. GRB 050716 - UKIRT identification of candidate afterglow
  77. Swift UVOT Observations of GRB 050716
  78. GRB 050716: Refined XRT analysis.
  79. GRB050716: Refined analysis of the Swift-BAT burst
  80. GRB050716, optical observation
  81. GRB050716: Faulkes North Telescope observation
  82. GRB050716: Correction to sign in XRT coordinate
  83. Swift/BAT detection of GRB 050716
  84. GRB050715: Refined analysis of the Swift-BAT burst
  85. GRB 050715: Swift-BAT detection
  86. Swift UVOT Observations of GRB 050714B
  87. Konus-Wind observation of GRB 050713A
  88. GRB 050714B: refined XRT analysis
  89. GRB050714B: Refined analysis of the Swift-BAT burst
  90. Swift detection of a long transient (GRB 050714B?)
  91. GRB 050714: Swift XRT afterglow position
  92. GRB 050713A: XRT refined analysis
  93. GRB 050713A: RAPTOR detection of early optical emission
  94. GRB050713B :Swift/UVOT observations
  95. GRB050713b: XRT refined analysis
  96. GRB 050713B: Swift-BAT Refined Analysis
  97. Swift-BAT Trigger 145729 is not a GRB
  98. GRB 050713A: Swift/UVOT observation
  99. GRB 050713A : Swift-BAT Refined Analysis
  100. GRB050712: Swift UVOT Observation of Afterglow Emission

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