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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"

23690 results found.

  1. GRB 060904b: SMARTS optical/IR afterglow observations
  2. GRB 060904B: RTT150 optical observations
  3. GRB 060904A: Subaru NIR observation
  4. GRB 060904B: Swift-BAT refined analysis
  5. GRB060904b: Optical observations with Swift/UVOT
  6. Konus-Wind observation of GRB 060904A
  7. GRB 060904A: Refined analysis of the Swift-BAT burst
  8. GRB 060904B: TAROT optical counterpart observations
  9. GRB060904B - SDSS Pre-Burst Observations
  10. GRB 060904: TAROT optical observations
  11. GRB 060904B: Swift detection of a burst with optical counterpart
  12. GRB060904 - SDSS Pre-Burst Observations
  13. GRB 060904: Swift detection of a bright burst
  14. Konus-Wind observation of GRB 060901
  15. GRB 060901: Swift/XRT Refined Analysis
  16. GRB 060901: Swift/XRT Position
  17. GRB 060901: further INTEGRAL results
  18. Two bright bursts from SGR 1806-20 detected with IBAS
  19. GRB 060605, observations using an Integral Field Unit
  20. GRB 060814: Suzaku/WAM observation of the prompt emission
  21. Swift-BAT trigger 226614 is not a GRB
  22. GRB060826 - SDSS Pre-Burst Observations
  23. GRB 060826(?): Swift detection of a possible burst
  24. GRB 060825: Swift-BAT Refined Analysis
  25. GRB 060813: Swift/BAT, Konus-Wind, and Suzaku/WAM joint prompt spectral analysis
  26. GRB060825: Liverpool Telescope optical observations
  27. GRB 060825: TNG optical observations
  28. GRB 060825: TAROT optical observations
  29. GRB 060825: P60 Observations
  30. GRB060825: BOOTES-IR optical observations
  31. GRB 060825: Swift detection of a burst
  32. GRB060814: Break in the XRT light curve
  33. GRB 060813: A long, bright GRB detected with Suzaku WAM
  34. Konus-Wind observation of GRB 060814
  35. GRB 060814: Refined analysis of the Swift-BAT burst
  36. GRB060805B: optical observations
  37. GRB 060814 - SDSS Pre-Burst Observations
  38. GRB 060814: TAROT optical observations
  39. GRB 060814: Swift detection of a bright burst
  40. Konus-Wind observation of GRB 060813
  41. GRB 060813: Refined analysis of the Swift-BAT burst
  42. GRB 060813: Swift detection of a burst
  43. GRB051109B: Late-time Radio Observations
  44. A dust-scattering halo detected around SGR 1806-20
  45. Swift detection of an outburst from the 4U 1246-58 LMXB burster
  46. GRB060807: Possible Highly Significant X-ray Emission Lines
  47. GRB060714: optical observations
  48. IBAS Alert n. 3422: not a GRB
  49. GRB060717: optical observations
  50. GRB 060805B: XRT Team Analysis
  51. GRB060806 is similar to previous activity of SGR1806-20
  52. GRB 060807: UVOT Upper limits
  53. GRB 060807: Refined analysis of the Swift-BAT burst
  54. GRB060806 = SGR1806-20
  55. GRB 060805B: RHESSI Spectral Fit
  56. GRB060807: optical upper limit in white light
  57. IPN triangulation of GRB060806 (long, exceptionally bright)
  58. GRB060807 - SDSS Pre-burst Observations
  59. GRB 060805B: Swift/UVOT Upper Limits
  60. GRB 060807: Kanazawa R-band observation
  61. GRB 060807: Swift detection of a burst
  62. GRB 060801: Second Epoch WSRT Radio Observations
  63. IPN triangulation of GRB060805B
  64. GRB 060805: optical upper limit in R
  65. GRB 060805: Swift-BAT Refined Analysis
  66. GRB 060805: Swift/UVOT Upper Limits
  67. GRB 060805: KAIT observations
  68. GRB 060805 - SDSS Pre-Burst Observations
  69. GRB 060805: Swift detection of a burst
  70. GRB 060804: Swift UVOT observations
  71. GRB 060804: Swift-XRT Team Refined Analysis
  72. GRB 060804: Refined analysis of the Swift-BAT burst
  73. GRB 060804: Swift detection of a burst with a possible UVOT counterpart
  74. GRB060801: Radio Observations
  75. GRB 060801: optical observations at Hanle and Calar Alto
  76. GRB060801: optical upper limit in R
  77. GRB 060801: Swift XRT refined analysis
  78. GRB 060801: Refined analysis of the Swift-BAT short hard burst
  79. GRB 060801: Swift detection of a short burst
  80. IBAS Alert n. 3415: not a GRB
  81. GRB 060719: TORTOREM optical upper limits
  82. GRB 060729: Refined analysis of the Swift-BAT burst
  83. GRB 060729: Swift detection of a burst with an UVOT optical counterpart
  84. GRB 060728: Swift/UVOT Upper Limits
  85. GRB 060728: Refined analysis of the Swift-BAT burst
  86. GRB 060728, SMARTS optical/IR observations
  87. GRB 060728: Swift detection of a burst
  88. GRB 060522: VLA observation
  89. GRB 060719: Swift/UVOT Upper Limits
  90. GRB 060719: VLT/ISAAC observations
  91. GRB 060719: Refined analysis of the Swift-BAT burst
  92. GRB 060719: XRT refined analysis
  93. GRB 060719: prompt PROMPT observations
  94. GRB 060719: Swift detection of a burst
  95. GRB 060717: Swift XRT refined analysis
  96. GRB 060714: OA fading and a possible host detection
  97. GRB 060714: Refined analysis of the Swift-BAT burst
  98. GRB 060717 optical upper limit
  99. GRB 060717: Swift XRT refined position
  100. GRB 060717: Swift-BAT refined analysis

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