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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"

36178 results found.

  1. GRB 060904A: Refined analysis of the Swift-BAT burst
  2. GRB 060904A: Swift-XRT refined analysis
  3. GRB 060904A: Suzaku-XIS and -HXD observation plan
  4. GRB 060904B: VLT redshift
  5. GRB 060904A: P60 Observations
  6. GRB 060904B: Optical observations at Crni Vrh
  7. GRB060904B: Watcher observations
  8. GRB 060904B BOOTES-IR and 1.5m OSN observations
  9. GRB 060904B: TAROT optical counterpart observations
  10. GRB060904B - SDSS Pre-Burst Observations
  11. GRB 060904: TAROT optical observations
  12. GRB 060904B: Swift detection of a burst with optical counterpart
  13. GRB 060904B: ROTSE-III Detection of Optical Counterpart
  14. GRB060904 - SDSS Pre-Burst Observations
  15. GRB 060904: Swift detection of a bright burst
  16. GRB 060901: pseudo-z from spectral parameters of the prompt
  17. Konus-Wind observation of GRB 060901
  18. GRB 060901: SMARTS optical/IR observations update
  19. GRB 060901: Swift/XRT Refined Analysis
  20. GRB 060901: SMARTS optical/IR observations
  21. GRB 060901: Swift/XRT Position
  22. GRB 060901: further INTEGRAL results
  23. GRB 060901: Watcher observations
  24. GRB 060901: a long GRB detected by INTEGRAL
  25. GRB 060605, observations using an Integral Field Unit
  26. GRB 060604: VLA Observation
  27. GRB 060814: Suzaku/WAM observation of the prompt emission
  28. GRB 060605: VLA Observation
  29. GRB 060707: VLA observation
  30. GRB 060825: VLA observations
  31. GRB 060825: pseudo-z from spectral parameters of the prompt emission
  32. Swift-BAT trigger 226614 is not a GRB
  33. GRB060826 - SDSS Pre-Burst Observations
  34. GRB 060826(?): Swift detection of a possible burst
  35. GRB 060825: XRT Team Refined Analysis
  36. GRB 060825: Swift-BAT Refined Analysis
  37. GRB 060813: Swift/BAT, Konus-Wind, and Suzaku/WAM joint prompt spectral analysis
  38. GRB060825: Liverpool Telescope optical observations
  39. GRB 060825: TNG optical observations
  40. GRB 060825: TAROT optical observations
  41. GRB 060825: P60 Observations
  42. GRB060825: BOOTES-IR optical observations
  43. GRB 060825: Swift detection of a burst
  44. GRB060801: host galaxy redshift
  45. GRB060729: analysis of XMM-Newton observation
  46. GRB 060814: pseudo-z from spectral parameters of the prompt
  47. Radio observations of GRB 060719
  48. GRB 060729, SMARTS optical/IR observations
  49. GRB060814: Break in the XRT light curve
  50. GRB060813: Break in the XRT light curve
  51. GRB 060813: A long, bright GRB detected with Suzaku WAM
  52. GRB 060814: Confirmation of IR afterglow
  53. Konus-Wind observation of GRB 060814
  54. GRB 060814: Refined analysis of the Swift-BAT burst
  55. GRB 060814: P60 Observations
  56. GRB 060814: P200 NIR Observations
  57. GRB 060814: source inside revised XRT error box
  58. GRB 060814: Possible IR counterpart
  59. GRB060805B: optical observations
  60. GRB060814: Swift/UVOT upper limits
  61. GRB 060813: pseudo-z from spectral parameters of the prompt
  62. GRB 060814: Swift XRT refined analysis
  63. GRB 060814: VLT optical limits
  64. GRB 060814 - SDSS Pre-Burst Observations
  65. GRB 060814: TAROT optical observations
  66. GRB 060814: Swift detection of a bright burst
  67. Konus-Wind observation of GRB 060813
  68. GRB060813: Swift/UVOT upper limits
  69. GRB 060813: Swift XRT refined analysis
  70. GRB 060813: Refined analysis of the Swift-BAT burst
  71. GRB 060813: Swift detection of a burst
  72. GRB051109B: Late-time Radio Observations
  73. Second VLA limit on new radio point source in SGR 1806-20
  74. GRB 060805B: pseudo-z from spectral parameters of the prompt emission
  75. GRB060714: optical observations
  76. IBAS Alert n. 3422: not a GRB
  77. GRB 060729: An update on the Swift XRT and UVOT observations
  78. GRB060717: optical observations
  79. GRB060807: Optical limiting magnitudes
  80. GRB 060805B: optical observation at Sierra Nevada
  81. GRB 060805B: XRT Team Analysis
  82. VLA Upper Limit on Outburst of SGR 1806-20
  83. GRB 060807: UVOT Upper limits
  84. GRB 060807: afterglow confirmation
  85. GRB 060807: XRT Team refined analysis
  86. GRB 060807: K- and R-band observations
  87. GRB 060807: Refined analysis of the Swift-BAT burst
  88. GRB060807: optical afterglow candidate
  89. GRB 060805B: RHESSI Spectral Fit
  90. GRB060807: optical upper limit in white light
  91. IPN triangulation of GRB060806 (long, exceptionally bright)
  92. GRB060807 - SDSS Pre-burst Observations
  93. GRB 060805B: X-ray Afterglow Detection, Spectral/Spatial/Temporal Properties
  94. GRB 060805B: Swift/UVOT Upper Limits
  95. GRB 060807, optical observation
  96. GRB 060807: Kanazawa R-band observation
  97. GRB 060807: optical limit
  98. GRB 060807: Swift detection of a burst
  99. GRB 060801: Second Epoch WSRT Radio Observations
  100. IPN triangulation of GRB060805B

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