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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"

28098 results found.

  1. Retraction of Swift Trigger 149131 (GRB 050805B)
  2. GRB 050805b: OHP optical limits
  3. GRB 050805b: TAROT optical limits
  4. GRB050805b: MASTER optical observations
  5. Possible GRB 050805B: Swift-BAT trigger 149131 may be a burst
  6. GRB050805a: MASTER optical candidat
  7. GRB050802: TNG optical observations
  8. GRB050803: Radio Observation
  9. GRB 050803: RTT150 optical observations
  10. GRB050801: Radio Observation
  11. GRB050730: Radio Detection
  12. GRB 050803: Keck Observations
  13. GRB 050803: Swift-BAT refined analysis
  14. GRB 050802.422: Fading of the afterglow and detection of the host
  15. GRB 050803: early Swift XRT analysis results
  16. GRB 050803: TAROT optical limits
  17. GCN GRB observation 050713A
  18. GRB050730: FORS1 and UVES/VLT low- and high-resolution spectroscopy
  19. GRB050802 radio non-detection
  20. GRB 050730: OHP optical observations
  21. GRB 050802: early Swift XRT analysis results
  22. GRB 050802: Swift/UVOT observations
  23. GRB 050802: Swift-BAT refined analysis
  24. GRB050801: Optical photometry and decay index
  25. GRB 050802: Swift Gamma-ray Burst
  26. GRB050801: Swift/UVOT Optical and UV detections
  27. GRB 050730: Preliminary Analysis of MIKE Spectrum
  28. GCN 050801: early Swift XRT analysis results
  29. GRB 050801: Swift-BAT refined analysis
  30. GRB 050730: XRT refined analysis
  31. GRB 050730: early TAROT optical observations
  32. GRB 050730, spectra and optical photometry
  33. GRB050730: Refined BAT analysis of the Swift-BAT burst
  34. GRB 050730 XMM-Newton observation
  35. GRB050730: Swift-BAT detection of a weak burst
  36. GRB050713b: Maidanak optical observations
  37. GRB 050724: Secure Host Redshift from Keck
  38. GRB 050724: WHT optical observations
  39. GRB050713: analysis of the XMM-Newton observation
  40. Swift-BAT trigger 147918 is not a real GRB
  41. GRB050724: VLT observations of the variable source
  42. GRB050709: Second Epoch Chandra Observation
  43. GRB050726: Swift-BAT detection of a weak burst
  44. GRB 050724: Optical Variability in Nearby Galaxy
  45. GRB 050724: J-band observations
  46. GRB 050724: GMOS Imaging and Spectroscopy
  47. GRB050724: Radio Observation
  48. GRB 050724: Optical imaging/astrometry
  49. GRB 050724: Swift/UVOT Upper Limit
  50. GRB050724: Refined analysis of the Swift-BAT possible short burst
  51. GRB 050724: possible host galaxy in DSS
  52. GRB 050721A: Swift-BAT refined analysis
  53. GRB 050721A: Early Swift XRT analysis results
  54. GRB050721A: optical decay
  55. GRB 050721: optical afterglow confirmed
  56. GRB 050709: Refined Spectral and Temporal Properties
  57. GRB050714b: Radio Observation
  58. GRB050712: Radio Observations
  59. GRB050713a: Radio Observation
  60. GRB 050712, Tautenburg optical afterglow observations
  61. Swift-BAT detection of a possible GRB
  62. GRB 050714B: VLT R-band observations
  63. GRB 050717: Additional LCO observations
  64. GRB 050716; J-band observations
  65. GRB 050717: LCO near-IR observations
  66. Swift/UVOT Observations of GRB 050717
  67. GRB 050717: Swift-BAT refined analysis
  68. GRB050717: Swift XRT position
  69. Swift detection of GRB 050717
  70. Swift UVOT Observations of GRB 050716
  71. GRB 050716: Refined XRT analysis.
  72. GRB050716: Refined analysis of the Swift-BAT burst
  73. GRB 050716: Lulin B and R band optical observations
  74. GRB050716, optical observation
  75. GRB050716: Faulkes North Telescope observation
  76. GRB050715: Refined analysis of the Swift-BAT burst
  77. GRB 050715: Swift-BAT detection
  78. GRB 050713b: RTT150 optical observations
  79. GRB050714B: Refined analysis of the Swift-BAT burst
  80. GRB 050714B: optical afterglow
  81. GRB 050714, R-band candidate
  82. GRB 050714, optical observations
  83. GRB 050713A: XRT refined analysis
  84. GRB 050713A: RAPTOR detection of early optical emission
  85. GRB050713B :Swift/UVOT observations
  86. GRB050713b: XRT refined analysis
  87. GRB050712: TNG R-band observations
  88. GRB 050713B: Swift-BAT Refined Analysis
  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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