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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"

11837 results found.

  1. GRB 091109B: Swift-XRT Team refined analysis
  2. GRB 091109B: ROTSE-III Optical Limits
  3. GRB 091109B: Swift detection of a short burst
  4. GRB091109: Correction to GCN 10139
  5. GRB 091109: Swift-XRT refined analysis
  6. GRB 091109: Swift/UVOT observations
  7. GRB 091109: Faulkes Telescope South observations
  8. GRB091109: REM detection of the NIR afterglow
  9. GRB 091109: Swift detection of a burst with optical afterglow
  10. GRB 091104: Swift-BAT refined analysis
  11. GRB 091104: Swift XRT Refined Analysis
  12. GRB 091104: Swift detection of a burst
  13. Fermi LAT Upper Limits on GRB 091010
  14. GRB 091102: Swift-BAT refined analysis
  15. GRB 091102: ROTSE-III Optical Limits
  16. GRB 091024: Fermi LAT upper limits
  17. GRB 091029: Swift XRT refined analysis
  18. GRB 091029: Swift-BAT refined analysis
  19. GRB 091029: Swift detection of a burst with an optical counterpart
  20. GRB 091020: Fermi GBM observation
  21. GRB 091026: Swift-XRT refined analysis
  22. Konus-Wind and Konus-RF observations of GRB 091024
  23. GRB 091026: Swift detection of a Gamma Ray Burst
  24. GRB 091020 : Xinglong TNT upper limit
  25. GRB 091024: KAIT optical afterglow observations
  26. GRB 091024: Swift-BAT refined analysis
  27. Konus-Wind observations of GRB 091010
  28. GRB 091020: Swift-XRT refined analysis
  29. GRB 091018: Swift XRT refined analysis
  30. GRB 091020: NOT spectroscopic redshift
  31. GRB 090926A: Late-time Gemini South Observations and Possible Jet Break
  32. Konus-RF observation of GRB 091018
  33. GRB091018: Swift/UVOT observations
  34. GRB 091018: Swift-BAT refined analysis
  35. GRB 091018: ROTSE-III Detection of Optical Counterpart
  36. GRB 091018: Swift detection of a burst with optical afterglow
  37. GRB 091003: Possible Supernova Component
  38. GRB 090815: a faint long GRB localized by INTEGRAL
  39. Radio observation of GRB080916c with ATCA
  40. GRB 090530A: Skynet/DSO Detections
  41. Konus-Wind observations of GRB 091010
  42. GRB 090812: Skynet/PROMPT and GORT Observations
  43. Konus-Wind observation of GRB 091003A
  44. GRB 090929B: Suzaku WAM observation of the prompt emission
  45. GRB 091003: Swift XRT analysis
  46. GRB 091003A: Fermi LAT detection
  47. GRB 090929B, Swift-BAT refined analysis
  48. Konus-Wind observation of GRB 090929A
  49. Konus-Wind observation of GRB 090929B
  50. GRB 090929B: Swift-XRT refined analysis
  51. GRB 090926A: Fermi LAT and GBM refined analysis
  52. Konus-RF observation of GRB 090929A
  53. GRB 090929B: RAPTOR Discovery of Optical Counterpart
  54. Konus-Wind and Konus-RF observations of GRB 090926A
  55. GRB 090927: Swift XRT refined analysis
  56. GRB 090926A: Suzaku WAM observation of the prompt emission
  57. GRB 090926B: MAXI GSC detection
  58. GRB 090926B: Swift XRT refined analysis
  59. GRB 090926B: Swift-BAT refined analysis
  60. GRB 090926B: Swift detection of a burst
  61. GRB 090926: Fermi LAT detection
  62. GRB 090926: Fermi GBM detection
  63. GRB 090925: Fermi GBM detection
  64. GRB 090915: Swift-XRT detection of a fading X-ray counterpart
  65. GRB 090912: Swift detection of a burst
  66. GRB 090904B: Swift-BAT refined analysis
  67. GRB 090904A: ROTSE-III Optical Limits
  68. GRB090902B: Swift XRT refined analysis
  69. GRB 090902B: Fermi LAT and GBM refined analysis.
  70. GRB 090902B: Fermi LAT detection
  71. Konus-Wind observations of GRB 090831A
  72. Konus-Wind observations of GRB 090827
  73. GRB 090827: Swift XRT and UVOT observations
  74. Konus-Wind observations of GRB 090823
  75. GRB 090823 Long burst with IPN triangulation and BAT position
  76. GRB 090820B: Fermi GBM detection
  77. GRB 090820: Fermi GBM Detection of a bright burst.
  78. GRB 090817: aphotometry of USNO-B1.0 341-0096763
  79. GRB 090814A: Swift-XRT Team Refined Analysis
  80. GRB 090813: correction to GCN 9787
  81. GRB 090814: Swift detection of a burst
  82. GRB 090813: Swift-XRT refined analysis
  83. Konus-Wind observations of GRB090813
  84. GRB 090813: Liverpool Telescope afterglow confirmation
  85. GRB 090813: P60 Optical Afterglow Confirmation
  86. GRB 090812: Swift detection of a burst with an optical counterpart
  87. GRB 090809: Swift detection of a burst with a possible optical counterpart
  88. GRB 090807: Swift-XRT refined analysis
  89. GRB 090807: Swift detection of a burst
  90. IPN Triangulation and Konus-Wind observaions of GRB090727B
  91. GRB 090726: optical observation
  92. GRB 090709A : Quick look analysis of the Suzaku observation
  93. GRB 090728: Swift detection of a burst
  94. GRB 090727: Swift-BAT refined analysis
  95. GRB 090711: Fermi GBM detection
  96. GRB 090726: Swift-XRT Team refined analysis
  97. GRB 090726: Swift detection of a burst
  98. Konus-Wind and Konus-RF observations of GRB 090719
  99. Konus-RF and Konus-Wind observations of GRB 090718B
  100. Konus-Wind observations of bright hard GRB 090720B

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