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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"

27919 results found.

  1. GRB 060901: SMARTS optical/IR observations update
  2. GRB 060901: Swift/XRT Refined Analysis
  3. GRB 060901: SMARTS optical/IR observations
  4. GRB 060901: Swift/XRT Position
  5. GRB 060901: Watcher observations
  6. GRB 060604: VLA Observation
  7. GRB 060814: Suzaku/WAM observation of the prompt emission
  8. GRB 060605: VLA Observation
  9. GRB 060707: VLA observation
  10. GRB 060825: VLA observations
  11. GRB 060825: pseudo-z from spectral parameters of the prompt emission
  12. Swift-BAT trigger 226614 is not a GRB
  13. GRB060826 - SDSS Pre-Burst Observations
  14. GRB 060826(?): Swift detection of a possible burst
  15. GRB 060825: XRT Team Refined Analysis
  16. GRB 060825: Swift-BAT Refined Analysis
  17. GRB 060813: Swift/BAT, Konus-Wind, and Suzaku/WAM joint prompt spectral analysis
  18. GRB060825: Liverpool Telescope optical observations
  19. GRB 060825: TAROT optical observations
  20. GRB060825: BOOTES-IR optical observations
  21. GRB 060825: Swift detection of a burst
  22. GRB060729: analysis of XMM-Newton observation
  23. GRB 060814: pseudo-z from spectral parameters of the prompt
  24. Radio observations of GRB 060719
  25. GRB060814: Break in the XRT light curve
  26. GRB060813: Break in the XRT light curve
  27. GRB 060813: A long, bright GRB detected with Suzaku WAM
  28. Konus-Wind observation of GRB 060814
  29. GRB 060814: Refined analysis of the Swift-BAT burst
  30. GRB060805B: optical observations
  31. GRB060814: Swift/UVOT upper limits
  32. GRB 060813: pseudo-z from spectral parameters of the prompt
  33. GRB 060814: Swift XRT refined analysis
  34. GRB 060814 - SDSS Pre-Burst Observations
  35. GRB 060814: TAROT optical observations
  36. GRB 060814: Swift detection of a bright burst
  37. Konus-Wind observation of GRB 060813
  38. GRB060813: Swift/UVOT upper limits
  39. GRB 060813: Swift XRT refined analysis
  40. GRB 060813: Refined analysis of the Swift-BAT burst
  41. GRB 060813: Swift detection of a burst
  42. Image of the dust-scattering halo around SGR 1806-20
  43. Second VLA limit on new radio point source in SGR 1806-20
  44. A dust-scattering halo detected around SGR 1806-20
  45. Swift detection of an outburst from the 4U 1246-58 LMXB burster
  46. GRB060714: optical observations
  47. GRB 060729: An update on the Swift XRT and UVOT observations
  48. GRB060807: Optical limiting magnitudes
  49. GRB 060805B: optical observation at Sierra Nevada
  50. GRB 060805B: XRT Team Analysis
  51. VLA Upper Limit on Outburst of SGR 1806-20
  52. GRB 060807: UVOT Upper limits
  53. GRB 060807: XRT Team refined analysis
  54. GRB 060807: Refined analysis of the Swift-BAT burst
  55. IPN triangulation of GRB060806 (long, exceptionally bright)
  56. GRB060807 - SDSS Pre-burst Observations
  57. GRB 060805B: X-ray Afterglow Detection, Spectral/Spatial/Temporal Properties
  58. GRB 060805B: Swift/UVOT Upper Limits
  59. GRB 060807: Swift detection of a burst
  60. GRB 060805: XRT Team Refined Analysis
  61. GRB 060805: Swift-BAT Refined Analysis
  62. GRB 060805: Swift/UVOT Upper Limits
  63. GRB 060805: KAIT observations
  64. GRB 060805 - SDSS Pre-Burst Observations
  65. GRB 060805: Swift detection of a burst
  66. GRB 060804: Swift UVOT observations
  67. GRB 060804: Swift-XRT Team Refined Analysis
  68. GRB 060804: Refined analysis of the Swift-BAT burst
  69. GRB 060804: Swift detection of a burst with a possible UVOT counterpart
  70. GRB 060728: Upper limits of the X-ray emission
  71. GRB 060801: WSRT Radio Observations
  72. GRB060801: Radio Observations
  73. GRB060801: Swift/UVOT Upper Limits
  74. GRB 060801: optical observations at Hanle and Calar Alto
  75. GRB 060801: Swift XRT refined analysis
  76. GRB 060801: Refined analysis of the Swift-BAT short hard burst
  77. GRB 060801: Swift detection of a short burst
  78. GRB060729: ROTSE-III Observations of the Slow Optical Decay
  79. GRB 060218 / SN 2006aj Nebular Spectrum
  80. Swift-BAT trigger 221873 is not a GRB or a Transient
  81. GRB 060729: Swift/UVOT Detections
  82. GRB 060729: Refined analysis of the Swift-BAT burst
  83. GRB 060729: Swift-XRT refined analysis
  84. GRB 060729: Swift/UVOT Observations
  85. GRB 060729: ROTSE-III Detection of Optical Counterpart
  86. GRB 060729: Swift detection of a burst with an UVOT optical counterpart
  87. GRB 060728: Swift/UVOT Upper Limits
  88. GRB 060728: Refined analysis of the Swift-BAT burst
  89. Swift/XRT preliminary analysis
  90. GRB 060728: Swift detection of a burst
  91. GRB060614 ATCA Radio Limits
  92. GRB 060218 (SN 2006aj): IR afterglow detection six months after the
  93. GRB 060714: Swift/UVOT Observations
  94. GRB 060522: VLA observation
  95. GRB 060719: Swift/UVOT Upper Limits
  96. GRB 060719: Refined analysis of the Swift-BAT burst
  97. GRB 060719: XRT refined analysis
  98. GRB 060719: optical limit by Pi-of-the-Sky
  99. GRB060719: FRAM early follow-up limit
  100. GRB 060719: Swift detection of a burst

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