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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"

41974 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: Swift/XRT Refined Analysis
  8. GRB 060906: Swift-UVOT observations
  9. VLT redshift of GRB 060906
  10. GRB 060906, Swift-BAT refined analysis
  11. GRB 060906: FRAM observations - flash determination (airplane)
  12. GRB 060906: KAIT observations
  13. GRB 060906: Confirmation of P60 Optical Afterglow
  14. GRB 060906: observations with FRAM
  15. GRB 060906 (?): P60 Optical Afterglow Candidate
  16. GRB 060906: Swift detection of a probable burst
  17. GRB 060904A Milagro GeV/TeV Observations
  18. GRB060904b, optical observations
  19. GRB 060904b: SMARTS optical/IR afterglow observations
  20. GRB 060904B: RTT150 optical observations
  21. GRB060904A: Swift/UVOT optical observations
  22. GRB 060904A: Subaru NIR observation
  23. GRB 060904B: Swift-BAT refined analysis
  24. GRB060904b: Optical observations with Swift/UVOT
  25. GRB 060904B: Swift-XRT refined analysis
  26. GRB 060904A: Refined analysis of the Swift-BAT burst
  27. GRB 060904A: Swift-XRT refined analysis
  28. GRB 060904A: Suzaku-XIS and -HXD observation plan
  29. GRB 060904B: VLT redshift
  30. GRB 060904A: P60 Observations
  31. GRB 060904B: Optical observations at Crni Vrh
  32. GRB060904B: Watcher observations
  33. GRB 060904B BOOTES-IR and 1.5m OSN observations
  34. GRB 060904B: TAROT optical counterpart observations
  35. GRB060904B - SDSS Pre-Burst Observations
  36. GRB 060904: TAROT optical observations
  37. GRB 060904B: Swift detection of a burst with optical counterpart
  38. GRB 060904B: ROTSE-III Detection of Optical Counterpart
  39. GRB060904 - SDSS Pre-Burst Observations
  40. GRB 060904: Swift detection of a bright burst
  41. GRB060901: Optical observations
  42. 060901: Swift UVOT followup observations
  43. Konus-Wind observation of GRB 060901
  44. GRB 060901: SMARTS optical/IR observations update
  45. GRB 060901: Swift/XRT Refined Analysis
  46. GRB 060901: SMARTS optical/IR observations
  47. GRB 060901: Swift/XRT Position
  48. GRB 060901: Watcher observations
  49. GRB 060901: a long GRB detected by INTEGRAL
  50. Two bright bursts from SGR 1806-20 detected with IBAS
  51. GRB 060605, observations using an Integral Field Unit
  52. GRB 060604: VLA Observation
  53. GRB 060814: Suzaku/WAM observation of the prompt emission
  54. GRB 060605: VLA Observation
  55. GRB 060707: VLA observation
  56. GRB 060825: VLA observations
  57. GRB060826 - SDSS Pre-Burst Observations
  58. GRB 060826(?): Swift detection of a possible burst
  59. GRB 060825: XRT Team Refined Analysis
  60. GRB 060825: Swift-BAT Refined Analysis
  61. GRB 060813: Swift/BAT, Konus-Wind, and Suzaku/WAM joint prompt spectral analysis
  62. GRB060825: Liverpool Telescope optical observations
  63. GRB 060825: TNG optical observations
  64. GRB 060825: TAROT optical observations
  65. GRB 060825: P60 Observations
  66. GRB060825: BOOTES-IR optical observations
  67. GRB 060825: Swift detection of a burst
  68. GRB060801: host galaxy redshift
  69. GRB060729: analysis of XMM-Newton observation
  70. Radio observations of GRB 060719
  71. GRB 060729, SMARTS optical/IR observations
  72. GRB 060813: A long, bright GRB detected with Suzaku WAM
  73. GRB 060814: Confirmation of IR afterglow
  74. Konus-Wind observation of GRB 060814
  75. GRB 060814: P60 Observations
  76. GRB 060814: P200 NIR Observations
  77. GRB 060814: Possible IR counterpart
  78. GRB060805B: optical observations
  79. GRB 060814: Swift XRT refined analysis
  80. GRB 060814: VLT optical limits
  81. GRB 060814 - SDSS Pre-Burst Observations
  82. GRB 060814: TAROT optical observations
  83. GRB 060814: Swift detection of a bright burst
  84. Konus-Wind observation of GRB 060813
  85. GRB 060813: Swift XRT refined analysis
  86. GRB 060813: Refined analysis of the Swift-BAT burst
  87. GRB 060813: Swift detection of a burst
  88. GRB051109B: Late-time Radio Observations
  89. Second VLA limit on new radio point source in SGR 1806-20
  90. A dust-scattering halo detected around SGR 1806-20
  91. Swift detection of an outburst from the 4U 1246-58 LMXB burster
  92. GRB060807: Possible Highly Significant X-ray Emission Lines
  93. GRB060714: optical observations
  94. GRB 060729: An update on the Swift XRT and UVOT observations
  95. GRB060717: optical observations
  96. GRB060807: Optical limiting magnitudes
  97. GRB 060805B: optical observation at Sierra Nevada
  98. GRB 060805B: XRT Team Analysis
  99. GRB060806 is similar to previous activity of SGR1806-20
  100. GRB 060807: XRT Team refined analysis

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