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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"

26521 results found.

  1. GRB 121025A: Confirmation of the X-ray afterglow
  2. GRB 121029A Suzaku WAM observation of the prompt emission
  3. GRB 121102A : a long GRB detected by INTEGRAL
  4. GRB 121102A: Swift detection of a burst
  5. GRB 121031A: Swift-BAT refined analysis
  6. GRB 121031A: Prompt enhanced Swift-XRT position
  7. GRB 121031A: Swift detection of a burst
  8. GRB 121024A: LOAO RIzY Observation
  9. GRB 121028A: near-IR observations at Calar Alto
  10. GRB 121027A: GROND Confirmation of Rebrightening
  11. GRB 121029A: Fermi GBM detection
  12. GRB 121028A: RAPTOR Limits During Gamma-Ray Emitting Interval
  13. GRB 121027A: MASTER early prompt optical limit
  14. GRB 121027A: Swift-XRT refined Analysis
  15. GRB 121027A: Brightening IR counterpart
  16. GRB 121028A: Swift-XRT refined Analysis
  17. GRB 121028A: Enhanced Swift-XRT position
  18. GRB 121028A: Swift-BAT refined analysis
  19. GRB 121027A: Enhanced Swift-XRT position
  20. GRB 121028A: Swift detection of a burst
  21. GRB 121027A: Swift-BAT refined analysis
  22. GRB 121027A: Swift detection of a burst
  23. GRB 121024A: Swift-BAT refined analysis
  24. GRB 121024A: Enhanced Swift-XRT position
  25. GRB 121024A: GROND Detection of the Optical/NIR Afterglow
  26. Skynet PROMPT/Dolomiti observations of GRB121024A
  27. GRB 121024A: TAROT Calern observatory optical detection of a bright counterpart
  28. GRB 121024A: Swift detection of a burst with an optical counterpart
  29. GRB 121017A: Swift-XRT refined Analysis
  30. GRB 121017A: Swift-BAT refined analysis
  31. GRB 121017A: Enhanced Swift-XRT position
  32. GRB 121017A: BOOTES-2/TELMA observations
  33. GRB 121017A: Swift detection of a burst
  34. GRB 121011B: Suzaku WAM observation of the prompt emission
  35. GRB 121011A Suzaku WAM observation of the prompt emission
  36. GRB 121012A: Fermi GBM detection
  37. PdB IRAM observation of GRB 121011A
  38. Konus-Wind observation of GRB 121011B
  39. GRB 121014A: Swift-BAT refined analysis
  40. GRB 121014A: Swift detection of a burst
  41. INTEGRAL Alert n.6678: NOT A GRB
  42. IPN Triangulation of short hard GRB 121011B
  43. GRB 121011A: NOT redshift retraction
  44. GRB 121011A: Fermi GBM observation
  45. GRB 121011A: Fermi-LAT detection of a burst
  46. GRB 121011A: Swift-XRT refined Analysis
  47. GRB 121011A: MASTER-Net bell light curve
  48. GRB 121011A, Swift-BAT refined analysis
  49. Swift-BAT refined analysis of the SGR 1806-20 outburst (trigger 535747)
  50. GRB 121011A: Enhanced Swift-XRT position
  51. Planned XMM-Newton and IRAM observation of GRB 121011A
  52. GRB121011A : Xinglong TNT optical observation
  53. GRB 121011A: Swift detection of a burst with optical afterglow
  54. GRB 121001A: GROND Afterglow Confirmation
  55. GRB 121001A: Enhanced Swift-XRT Position
  56. Swift Trigger 535026 is GRB 121001A: Swift-BAT refined analysis
  57. Swift Trigger 535026: Optical decay confirmation with IAC80 and BOOTES-2/TELMA.
  58. Swift Trigger 535026: ROTSE-III Optical Limits
  59. Swift Trigger 535026: Galactic Transient or possible GRB
  60. GRB 120927A, Swift-BAT refined analysis
  61. GRB 120927A: Swift-XRT refined Analysis
  62. GRB 120927A: Enhanced Swift-XRT position
  63. GRB 120927A: Swift detection of a burst
  64. GRB 120921A: Fermi GBM detection of its 1000th GRB
  65. GRB 120916A Suzaku WAM observation of the prompt emission
  66. GRB 120923A: RAPTOR Limits During Gamma-Ray Emitting Interval
  67. GRB 120923A: Swift-XRT refined Analysis
  68. GRB 120923A: GROND Upper limits
  69. GRB 120922A: Fermi GBM detection
  70. GRB 120922A: Swift/UVOT Detection
  71. GRB 120923A: Swift-BAT refined analysis
  72. GRB 120922A: Swift-BAT refined analysis
  73. GRB 120922A: Swift-XRT refined Analysis
  74. GRB 120923A: Gemini afterglow detection, high-z candidate
  75. GRB 120923A: Enhanced Swift-XRT position
  76. GRB 120922A: Enhanced Swift-XRT position
  77. GRB 120922A: TAROT La Silla observatory optical observations
  78. GRB 120923A: TAROT La Silla observatory optical observations
  79. GRB 120923A: Swift detection of a burst
  80. GRB 120922A: GROND afterglow candidate
  81. GRB 120922A: Prompt enhanced Swift-XRT position
  82. GRB 120922A: Swift detection of a burst
  83. GRB 120919B: MASTER prompt optical observations
  84. Konus-Wind observation of GRB 120919B
  85. IPN Triangulation of long GRB 120919B
  86. Konus-Wind observation of GRB 120919A
  87. IPN Triangulation of long GRB 120919A
  88. GRB 120919A: Fermi GBM detection
  89. GRB 120918A: Swift-BAT refined analysis
  90. GRB 120916A: Fermi GBM Observation
  91. Konus-Wind observation of GRB 120916A
  92. GRB 120918A: Swift detection of a burst
  93. IPN Triangulation of long GRB 120916A
  94. GRB 120916A: Fermi-LAT detection of a burst
  95. Swift Transient Swift J174510.8-262411: Swift-BAT refined analysis
  96. GRB 120913B: Fermi GBM observation
  97. GRB 120913B: Swift-BAT refined analysis
  98. GRB 120913A: Fermi GBM observation
  99. GRB 120913B: FRAM early follow up and detection
  100. GRB 120913A: Swift-BAT refined analysis

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