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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"

19643 results found.

  1. GRB 060825: Swift-BAT Refined Analysis
  2. GRB 060813: Swift/BAT, Konus-Wind, and Suzaku/WAM joint prompt spectral analysis
  3. GRB060825: Liverpool Telescope optical observations
  4. GRB 060825: TAROT optical observations
  5. GRB060825: BOOTES-IR optical observations
  6. GRB 060825: Swift detection of a burst
  7. GRB060729: analysis of XMM-Newton observation
  8. GRB 060814: pseudo-z from spectral parameters of the prompt
  9. Radio observations of GRB 060719
  10. GRB060814: Break in the XRT light curve
  11. GRB060813: Break in the XRT light curve
  12. GRB 060813: A long, bright GRB detected with Suzaku WAM
  13. Konus-Wind observation of GRB 060814
  14. GRB 060814: Refined analysis of the Swift-BAT burst
  15. GRB060805B: optical observations
  16. GRB060814: Swift/UVOT upper limits
  17. GRB 060813: pseudo-z from spectral parameters of the prompt
  18. GRB 060814: Swift XRT refined analysis
  19. GRB 060814 - SDSS Pre-Burst Observations
  20. GRB 060814: TAROT optical observations
  21. GRB 060814: Swift detection of a bright burst
  22. Konus-Wind observation of GRB 060813
  23. GRB060813: Swift/UVOT upper limits
  24. GRB 060813: Swift XRT refined analysis
  25. GRB 060813: Refined analysis of the Swift-BAT burst
  26. GRB 060813: Swift detection of a burst
  27. Image of the dust-scattering halo around SGR 1806-20
  28. A dust-scattering halo detected around SGR 1806-20
  29. Swift detection of an outburst from the 4U 1246-58 LMXB burster
  30. GRB060714: optical observations
  31. GRB 060729: An update on the Swift XRT and UVOT observations
  32. GRB060807: Optical limiting magnitudes
  33. GRB 060805B: optical observation at Sierra Nevada
  34. GRB 060805B: XRT Team Analysis
  35. GRB 060807: UVOT Upper limits
  36. GRB 060807: XRT Team refined analysis
  37. GRB 060807: Refined analysis of the Swift-BAT burst
  38. IPN triangulation of GRB060806 (long, exceptionally bright)
  39. GRB060807 - SDSS Pre-burst Observations
  40. GRB 060805B: X-ray Afterglow Detection, Spectral/Spatial/Temporal Properties
  41. GRB 060805B: Swift/UVOT Upper Limits
  42. GRB 060807: Swift detection of a burst
  43. GRB 060805: XRT Team Refined Analysis
  44. GRB 060805: Swift-BAT Refined Analysis
  45. GRB 060805: Swift/UVOT Upper Limits
  46. GRB 060805: KAIT observations
  47. GRB 060805 - SDSS Pre-Burst Observations
  48. GRB 060805: Swift detection of a burst
  49. GRB 060804: Swift UVOT observations
  50. GRB 060804: Swift-XRT Team Refined Analysis
  51. GRB 060804: Refined analysis of the Swift-BAT burst
  52. GRB 060804: Swift detection of a burst with a possible UVOT counterpart
  53. GRB 060728: Upper limits of the X-ray emission
  54. GRB 060801: WSRT Radio Observations
  55. GRB060801: Radio Observations
  56. GRB060801: Swift/UVOT Upper Limits
  57. GRB 060801: optical observations at Hanle and Calar Alto
  58. GRB 060801: Swift XRT refined analysis
  59. GRB 060801: Refined analysis of the Swift-BAT short hard burst
  60. GRB 060801: Swift detection of a short burst
  61. GRB060729: ROTSE-III Observations of the Slow Optical Decay
  62. Swift-BAT trigger 221873 is not a GRB or a Transient
  63. GRB 060729: Swift/UVOT Detections
  64. GRB 060729: Refined analysis of the Swift-BAT burst
  65. GRB 060729: Swift-XRT refined analysis
  66. GRB 060729: Swift/UVOT Observations
  67. GRB 060729: ROTSE-III Detection of Optical Counterpart
  68. GRB 060729: Swift detection of a burst with an UVOT optical counterpart
  69. GRB 060728: Swift/UVOT Upper Limits
  70. GRB 060728: Refined analysis of the Swift-BAT burst
  71. Swift/XRT preliminary analysis
  72. GRB 060728: Swift detection of a burst
  73. GRB060614 ATCA Radio Limits
  74. GRB 060714: Swift/UVOT Observations
  75. GRB 060522: VLA observation
  76. GRB 060719: Swift/UVOT Upper Limits
  77. GRB 060719: Refined analysis of the Swift-BAT burst
  78. GRB 060719: XRT refined analysis
  79. GRB 060719: optical limit by Pi-of-the-Sky
  80. GRB060719: FRAM early follow-up limit
  81. GRB 060719: Swift detection of a burst
  82. GRB 060717: Swift XRT refined analysis
  83. GRB 060714: Refined analysis of the Swift-BAT burst
  84. GRB060717: Swift/UVOT upper limits
  85. GRB 060717: Swift XRT refined position
  86. GRB 060717: Swift-BAT refined analysis
  87. GRB 060717: Swift detection of a burst
  88. GRB 060714: Swift XRT refined analysis
  89. GRB060708: MARGE low resolution spectrum observations
  90. Swift-BAT trigger 219136 is not a GRB
  91. GRB060707 possible optical confirmation
  92. Swift trigger 219136 is probably not a GRB
  93. GRB 060714: Swift detection of a burst with an UVOT optical afterglow
  94. GRB 060712: XRT refined analysis
  95. GRB 060712: Swift/UVOT Upper Limits
  96. GRB 060712: XRT refined position
  97. GRB 060712: Refined analysis of the Swift-BAT burst
  98. GRB 060712: Swift detection of a burst
  99. GRB 060708: Swift-XRT refined analysis
  100. GCN 060708: Swift-UVOT Observations

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