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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"

45562 results found.

  1. GRB 060908: PROMPT Detection of a Bright Counterpart
  2. GRB 060908: Swift detection of a burst with a bright optical counterpart
  3. GRB 060904A: Suzaku/WAM observation of the prompt emission
  4. GRB060906 , optical observation
  5. GRB060904b optical detections (delayed report due to internet outage)
  6. GRB 060906: optical observation
  7. GRB 060906: Early RAPTOR optical limits
  8. GRB 060906, Swift-BAT refined spectral analysis
  9. GRB 060906: Swift/XRT Refined Analysis
  10. GRB 060906: Swift-UVOT observations
  11. VLT redshift of GRB 060906
  12. GRB 060906, Swift-BAT refined analysis
  13. GRB 060906: KAIT observations
  14. GRB 060906: Confirmation of P60 Optical Afterglow
  15. GRB 060906: observations with FRAM
  16. GRB 060906 (?): P60 Optical Afterglow Candidate
  17. GRB 060906: Swift detection of a probable burst
  18. GRB 060904A Milagro GeV/TeV Observations
  19. GRB060904b, optical observations
  20. GRB 060904b: SMARTS optical/IR afterglow observations
  21. GRB 060904B: RTT150 optical observations
  22. GRB060904A: Swift/UVOT optical observations
  23. GRB 060904A: Subaru NIR observation
  24. GRB 060904A: pseudo-z from spectral parameters of the prompt emission
  25. GRB 060904B: Swift-BAT refined analysis
  26. GRB060904b: Optical observations with Swift/UVOT
  27. Konus-Wind observation of GRB 060904A
  28. GRB 060904B: Swift-XRT refined analysis
  29. GRB 060904A: Refined analysis of the Swift-BAT burst
  30. GRB 060904A: Swift-XRT refined analysis
  31. GRB 060904A: Suzaku-XIS and -HXD observation plan
  32. GRB 060904B: VLT redshift
  33. GRB 060904A: P60 Observations
  34. GRB 060904B: Optical observations at Crni Vrh
  35. GRB060904B: Watcher observations
  36. GRB 060904B BOOTES-IR and 1.5m OSN observations
  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. GRB 060904B: ROTSE-III Detection of Optical Counterpart
  42. GRB060904 - SDSS Pre-Burst Observations
  43. GRB 060904: Swift detection of a bright burst
  44. GRB060901: Optical observations
  45. 060901: Swift UVOT followup observations
  46. GRB 060901: pseudo-z from spectral parameters of the prompt
  47. Konus-Wind observation of GRB 060901
  48. GRB 060901: SMARTS optical/IR observations update
  49. GRB 060901: Swift/XRT Refined Analysis
  50. GRB 060901: SMARTS optical/IR observations
  51. GRB 060901: Swift/XRT Position
  52. GRB 060901: further INTEGRAL results
  53. GRB 060901: Watcher observations
  54. GRB 060901: a long GRB detected by INTEGRAL
  55. Two bright bursts from SGR 1806-20 detected with IBAS
  56. GRB 060605, observations using an Integral Field Unit
  57. GRB 060604: VLA Observation
  58. GRB 060814: Suzaku/WAM observation of the prompt emission
  59. GRB 060605: VLA Observation
  60. GRB 060707: VLA observation
  61. GRB 060825: VLA observations
  62. GRB 060825: pseudo-z from spectral parameters of the prompt emission
  63. Swift-BAT trigger 226614 is not a GRB
  64. GRB060826 - SDSS Pre-Burst Observations
  65. GRB 060826(?): Swift detection of a possible burst
  66. GRB 060825: XRT Team Refined Analysis
  67. GRB 060825: Swift-BAT Refined Analysis
  68. GRB 060813: Swift/BAT, Konus-Wind, and Suzaku/WAM joint prompt spectral analysis
  69. GRB060825: Liverpool Telescope optical observations
  70. GRB 060825: TNG optical observations
  71. GRB 060825: TAROT optical observations
  72. GRB 060825: P60 Observations
  73. GRB060825: BOOTES-IR optical observations
  74. GRB 060825: Swift detection of a burst
  75. GRB060801: host galaxy redshift
  76. GRB060729: analysis of XMM-Newton observation
  77. GRB 060814: pseudo-z from spectral parameters of the prompt
  78. IBAS Alerts No 3429 and 3430: not GRBs
  79. Radio observations of GRB 060719
  80. GRB 060729, SMARTS optical/IR observations
  81. GRB060814: Break in the XRT light curve
  82. GRB060813: Break in the XRT light curve
  83. GRB 060813: A long, bright GRB detected with Suzaku WAM
  84. GRB 060814: Confirmation of IR afterglow
  85. Konus-Wind observation of GRB 060814
  86. GRB 060814: Refined analysis of the Swift-BAT burst
  87. GRB 060814: P60 Observations
  88. GRB 060814: P200 NIR Observations
  89. GRB 060814: source inside revised XRT error box
  90. GRB 060814: Possible IR counterpart
  91. GRB060805B: optical observations
  92. GRB060814: Swift/UVOT upper limits
  93. GRB 060813: pseudo-z from spectral parameters of the prompt
  94. GRB 060814: Swift XRT refined analysis
  95. GRB 060814: VLT optical limits
  96. GRB 060814 - SDSS Pre-Burst Observations
  97. GRB 060814: TAROT optical observations
  98. GRB 060814: Swift detection of a bright burst
  99. Konus-Wind observation of GRB 060813
  100. GRB060813: Swift/UVOT upper limits

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