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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"

23619 results found.

  1. GRB 060923: UKIRT nIR observations - candidate afterglow
  2. GRB060923 - SDSS Pre-Burst Observations
  3. GRB 060923: KAIT observations
  4. GRB 060923: Swift detection of a burst
  5. Swift detection of IGR J17497-2821 (trigger 230504)
  6. GRB 060919 : Faulkes South Telescope Observations
  7. GRB 060919, Swift-BAT refined analysis
  8. GRB 060919: TAROT optical observations
  9. GRB 060919: Swift detection of a burst
  10. GRB060825: MAGIC telescope GeV observation
  11. Konus-Wind observation of GRB 060912
  12. GRB060912: optical observations
  13. GRB 060912B: Watcher observations
  14. GRB060912: OPTIMA-Burst optical observations
  15. GRB 060912B: a long GRB detected with INTEGRAL
  16. GRB 060912, Swift-BAT refined analysis
  17. GRB 060912: Swift detection of a burst with an optical afterglow
  18. GRB 060908: Swift/UVOT Observations
  19. GRB 060908, Swift-BAT refined analysis
  20. GRB 060908 - SDSS Pre-burst Observations
  21. GRB 060908: PROMPT Detection of a Bright Counterpart
  22. GRB 060908: Swift detection of a burst with a bright optical counterpart
  23. GRB 060904A: Suzaku/WAM observation of the prompt emission
  24. GRB060904b optical detections (delayed report due to internet outage)
  25. GRB 060906, Swift-BAT refined spectral analysis
  26. GRB 060906: Swift/XRT Refined Analysis
  27. GRB 060906, Swift-BAT refined analysis
  28. GRB 060906: KAIT observations
  29. GRB 060906: Swift detection of a probable burst
  30. GRB 060904b: SMARTS optical/IR afterglow observations
  31. GRB 060904B: RTT150 optical observations
  32. GRB 060904A: Subaru NIR observation
  33. GRB 060904B: Swift-BAT refined analysis
  34. GRB060904b: Optical observations with Swift/UVOT
  35. Konus-Wind observation of GRB 060904A
  36. GRB 060904A: Refined analysis of the Swift-BAT burst
  37. GRB 060904B: TAROT optical counterpart observations
  38. GRB060904B - SDSS Pre-Burst Observations
  39. GRB 060904: TAROT optical observations
  40. GRB 060904B: Swift detection of a burst with optical counterpart
  41. GRB060904 - SDSS Pre-Burst Observations
  42. GRB 060904: Swift detection of a bright burst
  43. Konus-Wind observation of GRB 060901
  44. GRB 060901: Swift/XRT Refined Analysis
  45. GRB 060901: Swift/XRT Position
  46. GRB 060901: further INTEGRAL results
  47. Two bright bursts from SGR 1806-20 detected with IBAS
  48. GRB 060605, observations using an Integral Field Unit
  49. GRB 060814: Suzaku/WAM observation of the prompt emission
  50. Swift-BAT trigger 226614 is not a GRB
  51. GRB060826 - SDSS Pre-Burst Observations
  52. GRB 060826(?): Swift detection of a possible burst
  53. GRB 060825: Swift-BAT Refined Analysis
  54. GRB 060813: Swift/BAT, Konus-Wind, and Suzaku/WAM joint prompt spectral analysis
  55. GRB060825: Liverpool Telescope optical observations
  56. GRB 060825: TNG optical observations
  57. GRB 060825: TAROT optical observations
  58. GRB 060825: P60 Observations
  59. GRB060825: BOOTES-IR optical observations
  60. GRB 060825: Swift detection of a burst
  61. GRB060814: Break in the XRT light curve
  62. GRB 060813: A long, bright GRB detected with Suzaku WAM
  63. Konus-Wind observation of GRB 060814
  64. GRB 060814: Refined analysis of the Swift-BAT burst
  65. GRB060805B: optical observations
  66. GRB 060814 - SDSS Pre-Burst Observations
  67. GRB 060814: TAROT optical observations
  68. GRB 060814: Swift detection of a bright burst
  69. Konus-Wind observation of GRB 060813
  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. A dust-scattering halo detected around SGR 1806-20
  74. Swift detection of an outburst from the 4U 1246-58 LMXB burster
  75. GRB060807: Possible Highly Significant X-ray Emission Lines
  76. GRB060714: optical observations
  77. IBAS Alert n. 3422: not a GRB
  78. GRB060717: optical observations
  79. GRB 060805B: XRT Team Analysis
  80. GRB060806 is similar to previous activity of SGR1806-20
  81. GRB 060807: UVOT Upper limits
  82. GRB 060807: Refined analysis of the Swift-BAT burst
  83. GRB060806 = SGR1806-20
  84. GRB 060805B: RHESSI Spectral Fit
  85. GRB060807: optical upper limit in white light
  86. IPN triangulation of GRB060806 (long, exceptionally bright)
  87. GRB060807 - SDSS Pre-burst Observations
  88. GRB 060805B: Swift/UVOT Upper Limits
  89. GRB 060807: Kanazawa R-band observation
  90. GRB 060807: Swift detection of a burst
  91. GRB 060801: Second Epoch WSRT Radio Observations
  92. IPN triangulation of GRB060805B
  93. GRB 060805: optical upper limit in R
  94. GRB 060805: Swift-BAT Refined Analysis
  95. GRB 060805: Swift/UVOT Upper Limits
  96. GRB 060805: KAIT observations
  97. GRB 060805 - SDSS Pre-Burst Observations
  98. GRB 060805: Swift detection of a burst
  99. GRB 060804: Swift UVOT observations
  100. GRB 060804: Swift-XRT Team Refined Analysis

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