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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"

29077 results found.

  1. GRB 071010B: Super-LOTIS upper limit
  2. GRB 071011, Swift-BAT refined analysis
  3. GRB 071011: Early Super-LOTIS Observations
  4. GRB 071011: Optical afterglow candidate
  5. GRB 071011: Swift detection of a burst
  6. Konus-Wind observation of GRB 071010B
  7. GRB 071010B, Swift-BAT refined analysis
  8. GRB 071006, Swift-BAT refined analysis
  9. GRB 071010B possible optical transient
  10. GRB 071010A: Keck/LRIS Photometry
  11. GRB 071010B: Swift detection of a burst
  12. GRB 071010: Swift-XRT observation
  13. GRB 071008, Swift-BAT refined analysis
  14. GRB 071010, Swift-BAT refined analysis
  15. GRB071008: Swift-XRT observation
  16. GRB 071010: TAROT La Silla observatory photometry of the afterglow
  17. GRB 071010: TAROT La Silla observatory detection of the afterglow
  18. GRB 071010: Swift detection of a burst
  19. GRB071008: IAC80 observation
  20. GRB 071008: Swift detection of a burst
  21. GRB 071003: XRT refined analysis
  22. GRB 070810B: further XRT analysis
  23. GRB 071003: Keck spectroscopy
  24. Konus-Wind observation of GRB 071003
  25. GRB071003: Faulkes Telescope North observations
  26. GRB 071003: Swift XRT position
  27. GRB 071003, Swift-BAT refined analysis
  28. GRB 071003: MARGE Observations
  29. GRB 071003: KAIT optical afterglow observations
  30. GRB 071003: Swift detection of a bright burst
  31. GRB 071001: Swift-XRT Team refined analysis
  32. GRB 071001, Swift-BAT refined analysis
  33. Faulkes Telescope South observations of GRB 071001
  34. GRB 071001: Swift detection of a burst
  35. GRB070925: Swift-XRT Position
  36. Update on Swift Status
  37. GRB 070920B: ROTSE-III Early Optical Limits
  38. Recent SGR1806-20 Activity
  39. GRB 070923, Swift-BAT refined analysis
  40. GRB 070920B: XRT observations
  41. GRB 070923: Swift detection of a short hard burst
  42. GRB 070917: Suzaku/WAM observation of the prompt emission
  43. GRB 070920B: TAROT La Silla observatory optical observations
  44. GRB 070920B, Swift-BAT refined analysis
  45. GRB 070911: Swift/BAT and Suzaku/WAM joint spectral analysis
  46. GRB 070920B: Swift detection of a burst
  47. GRB 070920, Swift-BAT refined analysis
  48. GRB 070920: TAROT Calern observatory optical observations
  49. GRB 070920: Swift detection of a burst
  50. SGR1806-20: Swift-BAT detection of enhanced activity
  51. GRB 070917: P60 Observations
  52. Konus-Wind observation of GRB 070917
  53. GRB 070917: Swift-XRT observations
  54. GRB 070917: KAIT optical limits
  55. GRB 070917: MITSuME Akeno Ic upper limit
  56. GRB 070917, Swift-BAT refined analysis
  57. GRB 070917: Swift detection of a bright burst
  58. GRB 070911: Suzaku WAM observation of the prompt emission
  59. GRB 070913: Swift-XRT detection of the possible X-ray afterglow
  60. GRB 070913: Swift-BAT refined analysis
  61. GRB 070913: TAROT La Silla observatory optical observations
  62. GRB 070913: Swift detection of a burst
  63. GRB 070911: Swift XRT refined analysis
  64. GRB 070911, Swift-BAT refined analysis
  65. GRB 070911: Swift detection of a burst
  66. Intense burst from SGR 1806-20 detected on September 7
  67. GRB 070824 - Combined SuperAGILE/IPN Localization
  68. GRB 070731: Swift/UVOT Upper Limit
  69. GRB 070805: UVOT afterglow candidate retraction
  70. GRB 070810A: ROTSE-III Refined Analysis
  71. GRB 070810B : Faulkes Telescope South Observations
  72. GRB070810B: Swift/UVOT Upper Limits
  73. GRB 070810B: XRT refined analysis
  74. GRB 070810B, Swift-BAT refined analysis
  75. GRB 070809: Swift/UVOT Corrected Photometry
  76. Swift Trigger 287421: False trigger due to star tracker loss
  77. GRB 070810A: Swift-BAT refined analysis
  78. GRB 070809: Swift/UVOT Upper Limits
  79. GRB 070810B: Swift detection of a short burst
  80. GRB 070810: Swift-XRT Team Refined Analysis
  81. GRB 070810: Swift/UVOT Optical Counterpart
  82. GRB 070810: ROTSE-III Detection of Optical Counterpart
  83. GRB 070810: Swift detection of a burst
  84. GRB 070809, Swift-BAT refined analysis
  85. GRB 070808: Swift/UVOT upper limits
  86. GRB 070809: ROTSE-III Optical Limits
  87. GRB 070809: Swift detection of a short burst
  88. GRB 070808 : Faulkes Telescope South Observations
  89. GRB 070808: Swift XRT refined analysis
  90. GRB 070808, Swift-BAT refined analysis
  91. GRB070808 - SDSS Pre-Burst Observations
  92. GRB 070808: ROTSE-III Optical Limits
  93. GRB 070808: Swift detection of a burst
  94. Swift trigger on 4U 1700-377 while star tracker loss-of-lock
  95. Swift/UVOT observations of GRB070805
  96. GRB 070805, Swift-BAT refined analysis
  97. GRB 070805: Swift XRT initial analysis.
  98. GRB 070805: Swift/UVOT initial analysis
  99. GRB 070805: Swift detection of a burst
  100. UVOT observations of SAXJ1810.8-2609

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