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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"

42312 results found.

  1. GRB 060904b: SMARTS optical/IR afterglow observations
  2. GRB 060904B: RTT150 optical observations
  3. GRB060904A: Swift/UVOT optical observations
  4. GRB 060904A: Subaru NIR observation
  5. GRB 060904B: Swift-BAT refined analysis
  6. GRB060904b: Optical observations with Swift/UVOT
  7. GRB 060904B: Swift-XRT refined analysis
  8. GRB 060904A: Refined analysis of the Swift-BAT burst
  9. GRB 060904A: Swift-XRT refined analysis
  10. GRB 060904A: Suzaku-XIS and -HXD observation plan
  11. GRB 060904B: VLT redshift
  12. GRB 060904A: P60 Observations
  13. GRB 060904B: Optical observations at Crni Vrh
  14. GRB060904B: Watcher observations
  15. GRB 060904B BOOTES-IR and 1.5m OSN observations
  16. GRB 060904B: TAROT optical counterpart observations
  17. GRB060904B - SDSS Pre-Burst Observations
  18. GRB 060904: TAROT optical observations
  19. GRB 060904B: Swift detection of a burst with optical counterpart
  20. GRB 060904B: ROTSE-III Detection of Optical Counterpart
  21. GRB060904 - SDSS Pre-Burst Observations
  22. GRB 060904: Swift detection of a bright burst
  23. GRB060901: Optical observations
  24. Konus-Wind observation of GRB 060901
  25. GRB 060901: SMARTS optical/IR observations update
  26. GRB 060901: Swift/XRT Refined Analysis
  27. GRB 060901: SMARTS optical/IR observations
  28. GRB 060901: Swift/XRT Position
  29. GRB 060901: Watcher observations
  30. GRB 060901: a long GRB detected by INTEGRAL
  31. Two bright bursts from SGR 1806-20 detected with IBAS
  32. GRB 060605, observations using an Integral Field Unit
  33. GRB 060604: VLA Observation
  34. GRB 060814: Suzaku/WAM observation of the prompt emission
  35. GRB 060605: VLA Observation
  36. GRB 060707: VLA observation
  37. GRB060826 - SDSS Pre-Burst Observations
  38. GRB 060826(?): Swift detection of a possible burst
  39. GRB 060825: XRT Team Refined Analysis
  40. GRB 060825: Swift-BAT Refined Analysis
  41. GRB 060813: Swift/BAT, Konus-Wind, and Suzaku/WAM joint prompt spectral analysis
  42. GRB060825: Liverpool Telescope optical observations
  43. GRB 060825: TNG optical observations
  44. GRB 060825: TAROT optical observations
  45. GRB 060825: P60 Observations
  46. GRB060825: BOOTES-IR optical observations
  47. GRB 060825: Swift detection of a burst
  48. GRB060801: host galaxy redshift
  49. GRB060729: analysis of XMM-Newton observation
  50. GRB 060729, SMARTS optical/IR observations
  51. GRB060814: Break in the XRT light curve
  52. GRB060813: Break in the XRT light curve
  53. GRB 060813: A long, bright GRB detected with Suzaku WAM
  54. GRB 060814: Confirmation of IR afterglow
  55. Konus-Wind observation of GRB 060814
  56. GRB 060814: P60 Observations
  57. GRB 060814: P200 NIR Observations
  58. GRB 060814: Possible IR counterpart
  59. GRB060805B: optical observations
  60. GRB060814: Swift/UVOT upper limits
  61. GRB 060814: Swift XRT refined analysis
  62. GRB 060814: VLT optical limits
  63. GRB 060814 - SDSS Pre-Burst Observations
  64. GRB 060814: TAROT optical observations
  65. GRB 060814: Swift detection of a bright burst
  66. Konus-Wind observation of GRB 060813
  67. GRB060813: Swift/UVOT upper limits
  68. GRB 060813: Swift XRT refined analysis
  69. GRB 060813: Refined analysis of the Swift-BAT burst
  70. GRB 060813: Swift detection of a burst
  71. GRB051109B: Late-time Radio Observations
  72. Image of the dust-scattering halo around SGR 1806-20
  73. Second VLA limit on new radio point source in SGR 1806-20
  74. A dust-scattering halo detected around SGR 1806-20
  75. Swift detection of an outburst from the 4U 1246-58 LMXB burster
  76. GRB060807: Possible Highly Significant X-ray Emission Lines
  77. GRB060714: optical observations
  78. GRB 060729: An update on the Swift XRT and UVOT observations
  79. GRB060717: optical observations
  80. GRB060807: Optical limiting magnitudes
  81. GRB 060805B: optical observation at Sierra Nevada
  82. GRB 060805B: XRT Team Analysis
  83. VLA Upper Limit on Outburst of SGR 1806-20
  84. GRB060806 is similar to previous activity of SGR1806-20
  85. GRB 060807: UVOT Upper limits
  86. GRB 060807: afterglow confirmation
  87. GRB 060807: XRT Team refined analysis
  88. GRB 060807: K- and R-band observations
  89. GRB060807: optical afterglow candidate
  90. GRB060806 = SGR1806-20
  91. GRB 060805B: RHESSI Spectral Fit
  92. GRB060807: optical upper limit in white light
  93. IPN triangulation of GRB060806 (long, exceptionally bright)
  94. GRB060807 - SDSS Pre-burst Observations
  95. GRB 060805B: X-ray Afterglow Detection, Spectral/Spatial/Temporal Properties
  96. GRB 060805B: Swift/UVOT Upper Limits
  97. GRB 060807, optical observation
  98. GRB 060807: Kanazawa R-band observation
  99. GRB 060807: optical limit
  100. GRB 060807: Swift detection of a burst

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