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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"

26566 results found.

  1. GRB060908: optical observations
  2. GRB 060729: An update on the late-time Swift observations
  3. GRB060923C: optical limit
  4. GRB 060927: pseudo-z from spectral parameters of the prompt emission
  5. GRB 060927 optical limit
  6. GRB 060927, Swift-BAT refined analysis
  7. GRB 060927, optical observation
  8. GRB 060927: Possible host galaxy (star?) in the SDSS
  9. GRB 060927 : Kiso optical observation
  10. GRB060927: Faulkes Telescope South observation
  11. GRB 060926: MASTER: first minutes decay
  12. GRB060927 - SDSS Pre-Burst Observations
  13. GRB 060927: optical afterglow confirmation
  14. Swift XRT boresight
  15. GRB060926: VLT redshift
  16. GRB 060926: Swift-UVOT Detections
  17. GRB 060923A: Schedule of Spitzer Space Telescope Observations
  18. GRB 060926: Swift XRT refined analysis
  19. GRB 060926, Swift-BAT refined analysis
  20. GRB 060923A: Radio Observations
  21. GRB 060926: MASTER OT alert observation
  22. GRB 060926: MASTER optical observation
  23. GRB 060923C, Swift-BAT refined analysis
  24. GRB 060923C: VLA Observation
  25. GRB 060923C: NIR afterglow confirmed
  26. GRB060923C: AROMA optical obsevation
  27. GRB 060923C: Gemini Observations and Afterglow Candidate
  28. GRB 060923C, optical observation
  29. GRB 060923A: Gemini Second Epoch and Afterglow Confirmation
  30. GRB 060923C: VLT J-band observations
  31. GRB 060923C: Swift XRT refined analysis
  32. GRB 060923A: Swift XRT refined analysis
  33. GRB 060923A: Keck and Gemini Observations
  34. GRB 060923B, Swift-BAT refined analysis
  35. GRB 060923, Swift-BAT refined analysis
  36. GRB 060923: Early Super-LOTIS Observations
  37. GRB060923 - SDSS Pre-Burst Observations
  38. GRB 060919, Swift-BAT refined analysis
  39. GRB 060919: TAROT optical observations
  40. GRB 060919: Swift detection of a burst
  41. GRB 060912A: VLA Observation
  42. GRB 060912A: Probable Host Galaxy
  43. GRB060825: MAGIC telescope GeV observation
  44. Konus-Wind observation of GRB 060912
  45. GRB060912: Swift/UVOT Observations
  46. GRB060912: OPTIMA-Burst optical observations
  47. GRB 060912B: a long GRB detected with INTEGRAL
  48. GRB 060912, Swift-BAT refined analysis
  49. VLA observations of GRB 060908
  50. GRB 060908, Swift-BAT refined analysis
  51. GRB 060908 - SDSS Pre-burst Observations
  52. GRB060906 , optical observation
  53. GRB060904b optical detections (delayed report due to internet outage)
  54. GRB 060906: Early RAPTOR optical limits
  55. GRB 060906, Swift-BAT refined spectral analysis
  56. GRB 060906: Swift/XRT Refined Analysis
  57. GRB 060906: Swift-UVOT observations
  58. VLT redshift of GRB 060906
  59. GRB 060906: KAIT observations
  60. GRB 060906: Confirmation of P60 Optical Afterglow
  61. GRB 060906: Swift detection of a probable burst
  62. GRB 060904A Milagro GeV/TeV Observations
  63. GRB060904b, optical observations
  64. GRB 060904A: pseudo-z from spectral parameters of the prompt emission
  65. GRB 060904B: Swift-BAT refined analysis
  66. Konus-Wind observation of GRB 060904A
  67. GRB 060904B: Swift-XRT refined analysis
  68. GRB 060904A: Refined analysis of the Swift-BAT burst
  69. GRB 060904A: Swift-XRT refined analysis
  70. GRB 060904A: P60 Observations
  71. GRB060904B: Watcher observations
  72. GRB 060904B BOOTES-IR and 1.5m OSN observations
  73. GRB 060904B: TAROT optical counterpart observations
  74. GRB060904B - SDSS Pre-Burst Observations
  75. GRB 060904: TAROT optical observations
  76. GRB 060904B: Swift detection of a burst with optical counterpart
  77. GRB060904 - SDSS Pre-Burst Observations
  78. 060901: Swift UVOT followup observations
  79. GRB 060901: pseudo-z from spectral parameters of the prompt
  80. Konus-Wind observation of GRB 060901
  81. GRB 060901: Watcher observations
  82. GRB 060901: a long GRB detected by INTEGRAL
  83. Two bright bursts from SGR 1806-20 detected with IBAS
  84. GRB 060605, observations using an Integral Field Unit
  85. GRB 060604: VLA Observation
  86. GRB 060814: Suzaku/WAM observation of the prompt emission
  87. GRB 060605: VLA Observation
  88. GRB 060707: VLA observation
  89. GRB 060825: VLA observations
  90. GRB 060825: pseudo-z from spectral parameters of the prompt emission
  91. GRB060826 - SDSS Pre-Burst Observations
  92. GRB 060826(?): Swift detection of a possible burst
  93. GRB 060825: XRT Team Refined Analysis
  94. GRB 060825: Swift-BAT Refined Analysis
  95. GRB 060813: Swift/BAT, Konus-Wind, and Suzaku/WAM joint prompt spectral analysis
  96. GRB 060825: TNG optical observations
  97. GRB 060825: TAROT optical observations
  98. GRB 060825: P60 Observations
  99. GRB060729: analysis of XMM-Newton observation
  100. GRB 060814: pseudo-z from spectral parameters of the prompt

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