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GCN Circulars

GCN Circulars are rapid astronomical bulletins submitted by and distributed to community members worldwide. They are used to share discoveries, observations, quantitative near-term predictions, requests for follow-up observations, or future observing plans related to high-energy, multi-messenger, and variable or transient astrophysical events. 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.

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subject:"Swift"
body:"GRB"
submitter:"Judith Racusin"

36193 results found.

  1. GRB060904b, optical observations
  2. GRB 060904b: SMARTS optical/IR afterglow observations
  3. GRB 060904B: RTT150 optical observations
  4. GRB060904A: Swift/UVOT optical observations
  5. GRB 060904A: Subaru NIR observation
  6. GRB 060904A: pseudo-z from spectral parameters of the prompt emission
  7. GRB 060904B: Swift-BAT refined analysis
  8. Konus-Wind observation of GRB 060904A
  9. GRB 060904B: Swift-XRT refined analysis
  10. GRB 060904A: Refined analysis of the Swift-BAT burst
  11. GRB 060904A: Swift-XRT refined analysis
  12. GRB 060904A: Suzaku-XIS and -HXD observation plan
  13. GRB 060904B: VLT redshift
  14. GRB 060904A: P60 Observations
  15. GRB 060904B: Optical observations at Crni Vrh
  16. GRB060904B: Watcher observations
  17. GRB 060904B BOOTES-IR and 1.5m OSN observations
  18. GRB 060904B: TAROT optical counterpart observations
  19. GRB060904B - SDSS Pre-Burst Observations
  20. GRB 060904: TAROT optical observations
  21. GRB 060904B: Swift detection of a burst with optical counterpart
  22. GRB 060904B: ROTSE-III Detection of Optical Counterpart
  23. GRB060904 - SDSS Pre-Burst Observations
  24. GRB 060904: Swift detection of a bright burst
  25. GRB 060901: pseudo-z from spectral parameters of the prompt
  26. Konus-Wind observation of GRB 060901
  27. GRB 060901: SMARTS optical/IR observations update
  28. GRB 060901: Swift/XRT Refined Analysis
  29. GRB 060901: SMARTS optical/IR observations
  30. GRB 060901: Swift/XRT Position
  31. GRB 060901: further INTEGRAL results
  32. GRB 060901: Watcher observations
  33. GRB 060901: a long GRB detected by INTEGRAL
  34. GRB 060605, observations using an Integral Field Unit
  35. GRB 060604: VLA Observation
  36. GRB 060814: Suzaku/WAM observation of the prompt emission
  37. GRB 060605: VLA Observation
  38. GRB 060707: VLA observation
  39. GRB 060825: VLA observations
  40. GRB 060825: pseudo-z from spectral parameters of the prompt emission
  41. Swift-BAT trigger 226614 is not a GRB
  42. GRB060826 - SDSS Pre-Burst Observations
  43. GRB 060826(?): Swift detection of a possible burst
  44. GRB 060825: XRT Team Refined Analysis
  45. GRB 060825: Swift-BAT Refined Analysis
  46. GRB 060813: Swift/BAT, Konus-Wind, and Suzaku/WAM joint prompt spectral analysis
  47. GRB060825: Liverpool Telescope optical observations
  48. GRB 060825: TNG optical observations
  49. GRB 060825: TAROT optical observations
  50. GRB 060825: P60 Observations
  51. GRB060825: BOOTES-IR optical observations
  52. GRB 060825: Swift detection of a burst
  53. GRB060801: host galaxy redshift
  54. GRB060729: analysis of XMM-Newton observation
  55. GRB 060814: pseudo-z from spectral parameters of the prompt
  56. Radio observations of GRB 060719
  57. GRB 060729, SMARTS optical/IR observations
  58. GRB060814: Break in the XRT light curve
  59. GRB060813: Break in the XRT light curve
  60. GRB 060813: A long, bright GRB detected with Suzaku WAM
  61. GRB 060814: Confirmation of IR afterglow
  62. Konus-Wind observation of GRB 060814
  63. GRB 060814: Refined analysis of the Swift-BAT burst
  64. GRB 060814: P60 Observations
  65. GRB 060814: P200 NIR Observations
  66. GRB 060814: source inside revised XRT error box
  67. GRB 060814: Possible IR counterpart
  68. GRB060805B: optical observations
  69. GRB060814: Swift/UVOT upper limits
  70. GRB 060813: pseudo-z from spectral parameters of the prompt
  71. GRB 060814: Swift XRT refined analysis
  72. GRB 060814: VLT optical limits
  73. GRB 060814 - SDSS Pre-Burst Observations
  74. GRB 060814: TAROT optical observations
  75. GRB 060814: Swift detection of a bright burst
  76. Konus-Wind observation of GRB 060813
  77. GRB060813: Swift/UVOT upper limits
  78. GRB 060813: Swift XRT refined analysis
  79. GRB 060813: Refined analysis of the Swift-BAT burst
  80. GRB 060813: Swift detection of a burst
  81. GRB051109B: Late-time Radio Observations
  82. Second VLA limit on new radio point source in SGR 1806-20
  83. GRB 060805B: pseudo-z from spectral parameters of the prompt emission
  84. GRB060714: optical observations
  85. IBAS Alert n. 3422: not a GRB
  86. GRB 060729: An update on the Swift XRT and UVOT observations
  87. GRB060717: optical observations
  88. GRB060807: Optical limiting magnitudes
  89. GRB 060805B: optical observation at Sierra Nevada
  90. GRB 060805B: XRT Team Analysis
  91. VLA Upper Limit on Outburst of SGR 1806-20
  92. GRB 060807: UVOT Upper limits
  93. GRB 060807: afterglow confirmation
  94. GRB 060807: XRT Team refined analysis
  95. GRB 060807: K- and R-band observations
  96. GRB 060807: Refined analysis of the Swift-BAT burst
  97. GRB060807: optical afterglow candidate
  98. GRB 060805B: RHESSI Spectral Fit
  99. GRB060807: optical upper limit in white light
  100. IPN triangulation of GRB060806 (long, exceptionally bright)

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