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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"

19665 results found.

  1. GRB 071011, Optical afterglow
  2. GRB 071011: MARGE Optical Limits
  3. GRB 071011: XRT afterglow detection
  4. GRB 071011, Swift-BAT refined analysis
  5. GRB 071011: Early Super-LOTIS Observations
  6. GRB 071010B: Bright OT confirmed with TLS
  7. GRB 071011: Swift detection of a burst
  8. Optical Observation: GRB 071010
  9. Optical observations: GRB 071010A
  10. Konus-Wind observation of GRB 071010B
  11. GRB071010B: Swift/XRT detection
  12. GRB 071010B, Swift-BAT refined analysis
  13. GRB 071006, Swift-BAT refined analysis
  14. GRB 071010B: Swift detection of a burst
  15. GRB 071010: Swift-XRT observation
  16. GRB 071008, Swift-BAT refined analysis
  17. GRB 071010, Swift-BAT refined analysis
  18. GRB071008: Swift-XRT observation
  19. GRB 071010: TAROT La Silla observatory detection of the afterglow
  20. GRB 071010: Swift detection of a burst
  21. GRB 071006 Swift-BAT detection of a burst
  22. GRB071008: IAC80 observation
  23. GRB 071008: Swift detection of a burst
  24. GRB 071003: XRT refined analysis
  25. GRB070920A: MAGIC telescope GeV observation
  26. Radio detection of GRB 071003 with the VLA
  27. GRB 070810B: further XRT analysis
  28. Konus-Wind observation of GRB 071003
  29. GRB 071003: Swift XRT position
  30. GRB 071003, Swift-BAT refined analysis
  31. GRB 071003: MARGE Observations
  32. GRB 071003 Optical observations
  33. GRB 071003: KAIT optical afterglow observations
  34. GRB 071003: Swift detection of a bright burst
  35. GRB 070714B: host galaxy spectroscopic redshift
  36. GRB 071001: Swift-XRT Team refined analysis
  37. GRB 071001, Swift-BAT refined analysis
  38. Faulkes Telescope South observations of GRB 071001
  39. GRB 071001: Swift detection of a burst
  40. VLA observation of GRB 070923
  41. Disregard the Swift-XRT Notices today
  42. GRB070925: Swift-XRT Afterglow confirmation
  43. GRB070925: Swift-XRT Position
  44. Update on Swift Status
  45. GRB 070920B: ROTSE-III Early Optical Limits
  46. Recent SGR1806-20 Activity
  47. GRB 070923, Swift-BAT refined analysis
  48. GRB 070920B: XRT observations
  49. GRB 070923: Swift detection of a short hard burst
  50. GRB 070917: Suzaku/WAM observation of the prompt emission
  51. GRB 070920B: TAROT La Silla observatory optical observations
  52. GRB 070917: Confirmation of the X-ray afterglow
  53. GRB 070920B, Swift-BAT refined analysis
  54. GRB 070911: Swift/BAT and Suzaku/WAM joint spectral analysis
  55. GRB 070920B: NOT optical observations
  56. GRB 070920B: Swift detection of a burst
  57. GRB 070920, Swift-BAT refined analysis
  58. GRB 070920: TAROT Calern observatory optical observations
  59. GRB 070920: Swift detection of a burst
  60. SGR1806-20: Swift-BAT detection of enhanced activity
  61. GRB 070917: pseudo-z= 2.40 from prompt emission spectrum
  62. Konus-Wind observation of GRB 070917
  63. Swift Status and XRT Calibration Uncertainties
  64. GRB 070917: Swift-XRT observations
  65. GRB 070917: KAIT optical limits
  66. GRB 070917: R band observations
  67. GRB 070917, Swift-BAT refined analysis
  68. GRB 070917: Swift detection of a bright burst
  69. GRB 070911: Suzaku WAM observation of the prompt emission
  70. GRB 070913: Swift-XRT detection of the possible X-ray afterglow
  71. GRB 070809: The Swift evidence for the SHB nature of this burst
  72. GRB 070913: Swift-BAT refined analysis
  73. GRB 070913: Corrected BAT position
  74. GRB 070913: TAROT La Silla observatory optical observations
  75. GRB 070913: Swift detection of a burst
  76. Swift-BAT Notices back to autonomous real-time distribution
  77. GRB 070911: Swift XRT refined analysis
  78. GRB 070911, Swift-BAT refined analysis
  79. GRB 070911: Swift detection of a burst
  80. IPN search for a GRB associated with TAROT transient on August 31
  81. Intense burst from SGR 1806-20 detected on September 7
  82. GRB 070824 - Combined SuperAGILE/IPN Localization
  83. GRB 070731: Swift/UVOT Upper Limit
  84. GRB 070805: UVOT afterglow candidate retraction
  85. GRB070810b: optical candidate
  86. GRB 070810A: ROTSE-III Refined Analysis
  87. Swift observatory off line
  88. GRB070810B: Swift/UVOT Upper Limits
  89. GRB 070810B: XRT refined analysis
  90. GRB 070810B, Swift-BAT refined analysis
  91. GRB 070809: Swift/UVOT Corrected Photometry
  92. Swift Alert 070810.8: MASTER optical observation
  93. Swift Trigger 287421: False trigger due to star tracker loss
  94. GRB 070810A: Swift-BAT refined analysis
  95. GRB 070809: Swift/UVOT Upper Limits
  96. GRB 070810B: Swift detection of a short burst
  97. VLA upper limit on the short hard burst GRB 070729
  98. No radio detection in superAGILE burst 070724B
  99. GRB 070810: Swift-XRT Team Refined Analysis
  100. GRB 070809: Swift-XRT refined analysis

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