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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"

19662 results found.

  1. GRB 101219A: Swift-XRT refined Analysis
  2. GRB 101219B: Swift detection of a burst with an optical afterglow
  3. GRB 101219A: Swift/UVOT Upper Limits
  4. GRB 101219A: GROND Upper limits
  5. Konus-Wind observation of short hard GRB 101219A
  6. GRB 101219A: Swift-BAT refined analysis
  7. GRB 101219A: ROTSE-III Optical Limits
  8. GRB 101219A: Swift detection of a short hard burst
  9. GRB 101213A : Suzaku WAM observation of the prompt emission
  10. Redshift solution(s) for GRB101213A from Swift-XRT data
  11. Konus-Wind observation of GRB 101213A
  12. GRB 101213A: Fermi GBM observation
  13. GRB 101213A, Swift-BAT refined analysis
  14. GRB 101213A: Swift-XRT refined Analysis
  15. GRB 101213A: Swift/UVOT Upper Limits
  16. GRB 101213A: Enhanced Swift-XRT position
  17. GRB 101213A: Swift detection of a burst
  18. GRB101204A: Swift/UVOT observations
  19. GRB 101204A: Swift-XRT refined Analysis
  20. GRB101204A GROND Detection of the Optical/NIR Afterglow
  21. GRB 101204A Afterglow Candidate, VATT Observations
  22. GRB 101129A : Suzaku WAM observation of the prompt emission
  23. GRB 101204A Swift-XRT/UVOT afterglow candidate
  24. GRB 101204A detected in ground analysis of BAT data
  25. GRB 101129A SHB found by IPN and in ground analysis of BAT data
  26. GRB 101201A: Fermi GBM observation
  27. GRB 101201A: Swift-XRT refined Analysis
  28. GRB 101201A: Swift/UVOT Detection
  29. GRB 101201A: GROND Detection of the Optical/NIR Afterglow
  30. GRB 101201A detected in ground analysis of BAT data
  31. Swift detection of MAXIJ1409-619
  32. IPN triangulation of bright GRB 101123A
  33. Optical observation of GRB 101024A
  34. GRB 101117B: GROND Upper limits
  35. GRB 101117B: Swift/UVOT Observations of the Optical Afterglow
  36. GRB 101117B: Swift-XRT refined analysis
  37. GRB101114A: Swift/UVOT Upper Limits
  38. GRB 101114A: Confirmation of the X-ray afterglow
  39. GRB 101117B: Swift-BAT refined analysis
  40. GRB 101117B: Enhanced Swift-XRT position
  41. GRB 101117B: Swift/UVOT Discovery of an Optical Afterglow
  42. GRB 101117B: Swift detection of a burst
  43. GRB 101114A: GROND Upper limits
  44. GRB 101114A: Swift-XRT candidate afterglow detection and analysis
  45. GRB 101114A, Swift-BAT GRB detected by ground processing
  46. GRB 101112A - XRT source detection/analysis
  47. GRB 101030A : MOA optical observation
  48. GRB 101030A : Swift XRT refined analysis
  49. GRB 101030A: Swift/UVOT Upper Limits
  50. GRB 101030A: Swift-BAT refined analysis
  51. GRB 101030A: Enhanced Swift-XRT position
  52. GRB 101030A: Swift detection of a burst
  53. Konus-Wind observation of GRB 101023A
  54. GRB 101024A: Swift XRT refined analysis
  55. GRB 101024A: Zadko observatory - Gingin. Optical observations
  56. GRB 101024A: Fermi GBM observation
  57. GRB 101023A: Fermi GBM observation
  58. GRB101024A: Swift/UVOT
  59. GRB 101024A: Swift-BAT refined analysis
  60. GRB 101024A: Enhanced Swift-XRT position
  61. Swift/UVOT observations of GRB101023A
  62. GRB 101024A: Swift detection of a burst with an optical afterglow
  63. GGRB 101023A: GROND detection of the optical-NIR afterglow
  64. GRB 101023A: Swift-XRT Team Refined Analysis
  65. GRB 101023A: Swift-BAT refined analysis
  66. GRB 101023A: Enhanced Swift-XRT position
  67. GRB 101023A: Swift detection of a burst
  68. GRB 101020A: MASTER prompt and afterglow limit
  69. GRB 101020A: MASTER polarization optical observations
  70. GRB 101020A, Swift-BAT refined analysis
  71. GRB 101020A: Swift detection of a burst
  72. GRB 101017A: Swift XRT refined analysis
  73. GRB 101017A: Swift/UVOT Observations
  74. GRB 101008A: optical observations
  75. Konus-Wind observation of GRB 101017A
  76. GRB 101017A: Enhanced Swift-XRT position
  77. GRB 101017A: Swift-BAT refined analysis
  78. GRB 101017A: ROTSE-III Optical Limits
  79. GRB 101017A: Swift detection of a burst with optical counterpart
  80. GRB 101011A: Fermi GBM detection
  81. GRB 101011A: BOOTES-3 Upper Limit
  82. GRB 100906A: D50 optical detection
  83. GRB 100902A: D50 optical limit
  84. GRB 101011A: Swift/UVOT observations
  85. GRB 101011A, GROND upper limits
  86. GRB 101011A: Zadko observatory - Gingin optical observations
  87. GRB 101011A: XRT Refined Analysis
  88. GRB 101011A: Swift/UVOT Observations of a Possible Optical Afterglow
  89. GRB 101011A: Enhanced Swift-XRT position
  90. GRB 101011A: Swift-BAT refined analysis
  91. GRB 101011A: Swift detection of a burst
  92. GRB 101008A: Fermi GBM observation
  93. GRB 101008A: MASTER prompt optical observations
  94. GRB 101008A: Swift-BAT refined analysis
  95. GRB101008A, GROND detection of a fading afterglow
  96. GRB 101008A: Swift-XRT refined analysis
  97. GRB 100915 optical upper limit
  98. GRB 101008: Swift/UVOT Upper Limits
  99. GRB 101008A: Enhanced Swift-XRT position
  100. GRB 101008A: 1.23m CAHA optical observations

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