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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"

32769 results found.

  1. GRB 060912: Redshift of nearby 2MASS galaxy
  2. GRB060912: optical observations
  3. GRB060912: Swift/UVOT Observations
  4. GRB060912: OPTIMA-Burst optical observations
  5. GRB 060912: Swift XRT Team Refined Analysis
  6. GRB 060912, Swift-BAT refined analysis
  7. GRB 060912: Correction to GCN 5559
  8. VLA observations of GRB 060908
  9. GRB 060908: redshift
  10. GRB 060908, Swift/XRT refined analysis
  11. GRB 060908: Swift/UVOT Observations
  12. GRB 060908: Danish/DFOSC optical observations
  13. GRB 060908, Swift-BAT refined analysis
  14. GRB 060904B : CFHT/WIRCam NIR afterglow observations
  15. GRB 060908: REM optical prompt observation
  16. GRB 060904A: Suzaku/WAM observation of the prompt emission
  17. GRB060906 , optical observation
  18. GRB060904b optical detections (delayed report due to internet outage)
  19. GRB 060906: optical observation
  20. GRB 060906: Early RAPTOR optical limits
  21. GRB 060906, Swift-BAT refined spectral analysis
  22. GRB 060906: Swift/XRT Refined Analysis
  23. GRB 060906: Swift-UVOT observations
  24. VLT redshift of GRB 060906
  25. GRB 060906, Swift-BAT refined analysis
  26. GRB 060906: FRAM observations - flash determination (airplane)
  27. GRB 060906: KAIT observations
  28. GRB 060906: Confirmation of P60 Optical Afterglow
  29. GRB 060906: observations with FRAM
  30. GRB 060904A Milagro GeV/TeV Observations
  31. GRB060904b, optical observations
  32. GRB 060904b: SMARTS optical/IR afterglow observations
  33. GRB 060904B: RTT150 optical observations
  34. GRB060904A: Swift/UVOT optical observations
  35. GRB 060904A: Subaru NIR observation
  36. GRB 060904A: pseudo-z from spectral parameters of the prompt emission
  37. GRB 060904B: Swift-BAT refined analysis
  38. GRB060904b: Optical observations with Swift/UVOT
  39. Konus-Wind observation of GRB 060904A
  40. GRB 060904B: Swift-XRT refined analysis
  41. GRB 060904A: Refined analysis of the Swift-BAT burst
  42. GRB 060904A: Swift-XRT refined analysis
  43. GRB 060904A: Suzaku-XIS and -HXD observation plan
  44. GRB 060904B: VLT redshift
  45. GRB 060904A: P60 Observations
  46. GRB060904B: Watcher observations
  47. GRB 060904B BOOTES-IR and 1.5m OSN observations
  48. GRB 060904B: ROTSE-III Detection of Optical Counterpart
  49. 060901: Swift UVOT followup observations
  50. Konus-Wind observation of GRB 060901
  51. GRB 060901: SMARTS optical/IR observations update
  52. GRB 060901: Swift/XRT Refined Analysis
  53. GRB 060901: SMARTS optical/IR observations
  54. GRB 060901: Swift/XRT Position
  55. GRB 060901: Watcher observations
  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. Swift-BAT trigger 226614 is not a GRB
  63. GRB 060825: XRT Team Refined Analysis
  64. GRB 060825: Swift-BAT Refined Analysis
  65. GRB 060813: Swift/BAT, Konus-Wind, and Suzaku/WAM joint prompt spectral analysis
  66. GRB060825: Liverpool Telescope optical observations
  67. GRB 060825: TNG optical observations
  68. GRB 060825: P60 Observations
  69. GRB060825: BOOTES-IR optical observations
  70. GRB060801: host galaxy redshift
  71. Radio observations of GRB 060719
  72. GRB 060729, SMARTS optical/IR observations
  73. GRB 060813: A long, bright GRB detected with Suzaku WAM
  74. GRB 060814: Confirmation of IR afterglow
  75. Konus-Wind observation of GRB 060814
  76. GRB 060814: Refined analysis of the Swift-BAT burst
  77. GRB 060814: P60 Observations
  78. GRB 060814: P200 NIR Observations
  79. GRB 060814: source inside revised XRT error box
  80. GRB 060814: Possible IR counterpart
  81. GRB060805B: optical observations
  82. GRB060814: Swift/UVOT upper limits
  83. GRB 060813: pseudo-z from spectral parameters of the prompt
  84. GRB 060814: Swift XRT refined analysis
  85. GRB 060814: VLT optical limits
  86. Konus-Wind observation of GRB 060813
  87. GRB060813: Swift/UVOT upper limits
  88. GRB 060813: Swift XRT refined analysis
  89. GRB 060813: Refined analysis of the Swift-BAT burst
  90. GRB051109B: Late-time Radio Observations
  91. Image of the dust-scattering halo around SGR 1806-20
  92. Second VLA limit on new radio point source in SGR 1806-20
  93. A dust-scattering halo detected around SGR 1806-20
  94. GRB 060729: An update on the Swift XRT and UVOT observations
  95. GRB060717: optical observations
  96. GRB060807: Optical limiting magnitudes
  97. GRB 060805B: XRT Team Analysis
  98. VLA Upper Limit on Outburst of SGR 1806-20
  99. GRB060806 is similar to previous activity of SGR1806-20
  100. GRB 060807: UVOT Upper limits

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