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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"

29095 results found.

  1. GRB 071018: Mercator Telescope optical observations
  2. GRB 071018: SARA observations
  3. GRB 071018: Swift-XRT observation
  4. GRB 071017 - Swift XRT observations
  5. GRB 071010A: Late-time Keck/LRIS photometry - possible host galaxy and jet break
  6. GRB 071018, Swift-BAT refined analysis
  7. GRB 071018?: Swift detection of a possible burst
  8. GRB 071010B: Suzaku WAM observation of the prompt emission
  9. GRB 071011: MITSuME Optical Observations
  10. GRB 071010B: Photometry after 1.6 days
  11. GRB 071013, Swift-BAT refined analysis
  12. GRB 071013: Swift detection of a burst
  13. GRB 071010C Swift-BAT detection of a burst
  14. GRB 071011: Optical Limit after 13.95hrs
  15. GRB 071011: Swift-XRT refined analysis
  16. GRB 071010B: Optical Detection
  17. GRB 071011: Kanazawa Optical limits
  18. GRB 071011: MARGE Optical Limits
  19. GRB 071010B: Super-LOTIS upper limit
  20. GRB 071011, Swift-BAT refined analysis
  21. GRB 071011: Early Super-LOTIS Observations
  22. GRB 071011: Optical afterglow candidate
  23. GRB 071011: Swift detection of a burst
  24. Konus-Wind observation of GRB 071010B
  25. GRB 071010B, Swift-BAT refined analysis
  26. GRB 071006, Swift-BAT refined analysis
  27. GRB 071010B possible optical transient
  28. GRB 071010A: Keck/LRIS Photometry
  29. GRB 071010B: Swift detection of a burst
  30. GRB 071010: Swift-XRT observation
  31. GRB 071008, Swift-BAT refined analysis
  32. GRB 071010, Swift-BAT refined analysis
  33. GRB071008: Swift-XRT observation
  34. GRB 071010: TAROT La Silla observatory photometry of the afterglow
  35. GRB 071010: TAROT La Silla observatory detection of the afterglow
  36. GRB 071010: Swift detection of a burst
  37. GRB071008: IAC80 observation
  38. GRB 071008: Swift detection of a burst
  39. GRB 071003: XRT refined analysis
  40. GRB 070810B: further XRT analysis
  41. GRB 071003: Keck spectroscopy
  42. Konus-Wind observation of GRB 071003
  43. GRB071003: Faulkes Telescope North observations
  44. GRB 071003: Swift XRT position
  45. GRB 071003, Swift-BAT refined analysis
  46. GRB 071003: MARGE Observations
  47. GRB 071003: KAIT optical afterglow observations
  48. GRB 071003: Swift detection of a bright burst
  49. GRB 071001: Swift-XRT Team refined analysis
  50. GRB 071001, Swift-BAT refined analysis
  51. Faulkes Telescope South observations of GRB 071001
  52. GRB 071001: Swift detection of a burst
  53. GRB070925: Swift-XRT Position
  54. Update on Swift Status
  55. GRB 070920B: ROTSE-III Early Optical Limits
  56. Recent SGR1806-20 Activity
  57. GRB 070923, Swift-BAT refined analysis
  58. GRB 070920B: XRT observations
  59. GRB 070923: Swift detection of a short hard burst
  60. GRB 070917: Suzaku/WAM observation of the prompt emission
  61. GRB 070920B: TAROT La Silla observatory optical observations
  62. GRB 070920B, Swift-BAT refined analysis
  63. GRB 070911: Swift/BAT and Suzaku/WAM joint spectral analysis
  64. GRB 070920B: Swift detection of a burst
  65. GRB 070920, Swift-BAT refined analysis
  66. GRB 070920: TAROT Calern observatory optical observations
  67. GRB 070920: Swift detection of a burst
  68. SGR1806-20: Swift-BAT detection of enhanced activity
  69. GRB 070917: P60 Observations
  70. Konus-Wind observation of GRB 070917
  71. GRB 070917: Swift-XRT observations
  72. GRB 070917: KAIT optical limits
  73. GRB 070917: MITSuME Akeno Ic upper limit
  74. GRB 070917, Swift-BAT refined analysis
  75. GRB 070917: Swift detection of a bright burst
  76. GRB 070911: Suzaku WAM observation of the prompt emission
  77. GRB 070913: Swift-XRT detection of the possible X-ray afterglow
  78. GRB 070913: Swift-BAT refined analysis
  79. GRB 070913: TAROT La Silla observatory optical observations
  80. GRB 070913: Swift detection of a burst
  81. GRB 070911: Swift XRT refined analysis
  82. GRB 070911, Swift-BAT refined analysis
  83. GRB 070911: Swift detection of a burst
  84. Intense burst from SGR 1806-20 detected on September 7
  85. GRB 070824 - Combined SuperAGILE/IPN Localization
  86. GRB 070731: Swift/UVOT Upper Limit
  87. GRB 070805: UVOT afterglow candidate retraction
  88. GRB 070810A: ROTSE-III Refined Analysis
  89. GRB 070810B : Faulkes Telescope South Observations
  90. GRB070810B: Swift/UVOT Upper Limits
  91. GRB 070810B: XRT refined analysis
  92. GRB 070810B, Swift-BAT refined analysis
  93. GRB 070809: Swift/UVOT Corrected Photometry
  94. Swift Trigger 287421: False trigger due to star tracker loss
  95. GRB 070810A: Swift-BAT refined analysis
  96. GRB 070809: Swift/UVOT Upper Limits
  97. GRB 070810B: Swift detection of a short burst
  98. GRB 070810: Swift-XRT Team Refined Analysis
  99. GRB 070810: Swift/UVOT Optical Counterpart
  100. GRB 070810: ROTSE-III Detection of Optical Counterpart

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