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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"

19663 results found.

  1. GRB 060904B: TAROT optical counterpart observations
  2. GRB060904B - SDSS Pre-Burst Observations
  3. GRB 060904: TAROT optical observations
  4. GRB 060904B: Swift detection of a burst with optical counterpart
  5. GRB 060904B: ROTSE-III Detection of Optical Counterpart
  6. GRB060904 - SDSS Pre-Burst Observations
  7. GRB 060904: Swift detection of a bright burst
  8. 060901: Swift UVOT followup observations
  9. GRB 060901: Swift/XRT Refined Analysis
  10. GRB 060901: Swift/XRT Position
  11. GRB 060604: VLA Observation
  12. GRB 060814: Suzaku/WAM observation of the prompt emission
  13. GRB 060605: VLA Observation
  14. GRB 060707: VLA observation
  15. GRB 060825: VLA observations
  16. GRB 060825: pseudo-z from spectral parameters of the prompt emission
  17. Swift-BAT trigger 226614 is not a GRB
  18. GRB060826 - SDSS Pre-Burst Observations
  19. GRB 060826(?): Swift detection of a possible burst
  20. GRB 060825: XRT Team Refined Analysis
  21. GRB 060825: Swift-BAT Refined Analysis
  22. GRB 060813: Swift/BAT, Konus-Wind, and Suzaku/WAM joint prompt spectral analysis
  23. GRB060825: Liverpool Telescope optical observations
  24. GRB 060825: TAROT optical observations
  25. GRB060825: BOOTES-IR optical observations
  26. GRB 060825: Swift detection of a burst
  27. GRB060729: analysis of XMM-Newton observation
  28. GRB 060814: pseudo-z from spectral parameters of the prompt
  29. Radio observations of GRB 060719
  30. GRB060814: Break in the XRT light curve
  31. GRB060813: Break in the XRT light curve
  32. GRB 060813: A long, bright GRB detected with Suzaku WAM
  33. Konus-Wind observation of GRB 060814
  34. GRB 060814: Refined analysis of the Swift-BAT burst
  35. GRB060805B: optical observations
  36. GRB060814: Swift/UVOT upper limits
  37. GRB 060813: pseudo-z from spectral parameters of the prompt
  38. GRB 060814: Swift XRT refined analysis
  39. GRB 060814 - SDSS Pre-Burst Observations
  40. GRB 060814: TAROT optical observations
  41. GRB 060814: Swift detection of a bright burst
  42. Konus-Wind observation of GRB 060813
  43. GRB060813: Swift/UVOT upper limits
  44. GRB 060813: Swift XRT refined analysis
  45. GRB 060813: Refined analysis of the Swift-BAT burst
  46. GRB 060813: Swift detection of a burst
  47. Image of the dust-scattering halo around SGR 1806-20
  48. A dust-scattering halo detected around SGR 1806-20
  49. Swift detection of an outburst from the 4U 1246-58 LMXB burster
  50. GRB060714: optical observations
  51. GRB 060729: An update on the Swift XRT and UVOT observations
  52. GRB060807: Optical limiting magnitudes
  53. GRB 060805B: optical observation at Sierra Nevada
  54. GRB 060805B: XRT Team Analysis
  55. GRB 060807: UVOT Upper limits
  56. GRB 060807: XRT Team refined analysis
  57. GRB 060807: Refined analysis of the Swift-BAT burst
  58. IPN triangulation of GRB060806 (long, exceptionally bright)
  59. GRB060807 - SDSS Pre-burst Observations
  60. GRB 060805B: X-ray Afterglow Detection, Spectral/Spatial/Temporal Properties
  61. GRB 060805B: Swift/UVOT Upper Limits
  62. GRB 060807: Swift detection of a burst
  63. GRB 060805: XRT Team Refined Analysis
  64. GRB 060805: Swift-BAT Refined Analysis
  65. GRB 060805: Swift/UVOT Upper Limits
  66. GRB 060805: KAIT observations
  67. GRB 060805 - SDSS Pre-Burst Observations
  68. GRB 060805: Swift detection of a burst
  69. GRB 060804: Swift UVOT observations
  70. GRB 060804: Swift-XRT Team Refined Analysis
  71. GRB 060804: Refined analysis of the Swift-BAT burst
  72. GRB 060804: Swift detection of a burst with a possible UVOT counterpart
  73. GRB 060728: Upper limits of the X-ray emission
  74. GRB 060801: WSRT Radio Observations
  75. GRB060801: Radio Observations
  76. GRB060801: Swift/UVOT Upper Limits
  77. GRB 060801: optical observations at Hanle and Calar Alto
  78. GRB 060801: Swift XRT refined analysis
  79. GRB 060801: Refined analysis of the Swift-BAT short hard burst
  80. GRB 060801: Swift detection of a short burst
  81. GRB060729: ROTSE-III Observations of the Slow Optical Decay
  82. Swift-BAT trigger 221873 is not a GRB or a Transient
  83. GRB 060729: Swift/UVOT Detections
  84. GRB 060729: Refined analysis of the Swift-BAT burst
  85. GRB 060729: Swift-XRT refined analysis
  86. GRB 060729: Swift/UVOT Observations
  87. GRB 060729: ROTSE-III Detection of Optical Counterpart
  88. GRB 060729: Swift detection of a burst with an UVOT optical counterpart
  89. GRB 060728: Swift/UVOT Upper Limits
  90. GRB 060728: Refined analysis of the Swift-BAT burst
  91. Swift/XRT preliminary analysis
  92. GRB 060728: Swift detection of a burst
  93. GRB060614 ATCA Radio Limits
  94. GRB 060714: Swift/UVOT Observations
  95. GRB 060522: VLA observation
  96. GRB 060719: Swift/UVOT Upper Limits
  97. GRB 060719: Refined analysis of the Swift-BAT burst
  98. GRB 060719: XRT refined analysis
  99. GRB 060719: optical limit by Pi-of-the-Sky
  100. GRB060719: FRAM early follow-up limit

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