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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"

26519 results found.

  1. GRB 120913B: Swift detection of a burst
  2. GRB 120913A: Swift detection of a burst
  3. Konus-Wind observation of GRB 120911B
  4. GRB 120911B: Fermi GBM observation
  5. IPN Triangulation of GRB 120911B (long/bright)
  6. GRB 120911A: Fermi GBM observation
  7. GRB 120911A: Fermi/LAT upper limit
  8. GRB 120911A: Swift-XRT refined Analysis
  9. GRB 120911A: Swift-BAT refined analysis
  10. GRB 120911A: Enhanced Swift-XRT position
  11. GRB 120911A: Swift detection of a burst
  12. GRB 120908A and GRB 120909A : Fermi/LAT upper limit
  13. GRB 120908A: Fermi GBM detection
  14. GRB 120909A: TAROT La Silla observatory optical observations
  15. GRB 120909A: Fermi GBM observation
  16. Konus-Wind observation of GRB 120909A
  17. GRB 120909A: Swift-XRT refined Analysis
  18. GRB 120909A: Swift-BAT refined analysis
  19. GRB 120909A: Enhanced Swift-XRT position
  20. GRB 120909A: GROND detection of the afterglow
  21. GRB 120909A: Swift detection of a burst
  22. GRB 120907A: Swift-XRT refined Analysis
  23. GRB 120907A: Enhanced Swift-XRT position
  24. GRB 120907A: Fermi GBM detection
  25. GRB 120907A: Swift-BAT refined analysis
  26. GRB 120907A: Swift detection of a burst with optical counterpart
  27. XMM observations of the short GRB120804A
  28. GRB 120802A: optical observations in CrAO
  29. GRB 120830A: Further Swift Observations
  30. GRB 120830A: Fermi GBM observation
  31. Konus-Wind observation of GRB 120830A
  32. IPN Triangulation of short GRB 120830A
  33. GRB 120821A: GROND upper limits
  34. GRB 120821A: a long GRB detected by INTEGRAL
  35. GRB 120817B: BAT location in ground analysis and refined analysis
  36. GRB 120819A: Bassano Bresciano Observatory optical observations
  37. GRB 120819A: Swift-BAT refined analysis
  38. GRB 120819A: GROND afterglow confirmation
  39. GRB 120819A: Swift-XRT refined Analysis
  40. GRB 120819A: Enhanced Swift-XRT position
  41. GRB 120819A: Swift detection of a burst
  42. GRB 120816A: Swift/UVOT Detection of the Optical Afterglow
  43. Konus-Wind observation of GRB 120816B
  44. IPN Triangulation of GRB 120816B (short/exceptionally intense)
  45. Konus-Wind observation of GRB 120817B
  46. GRB 120817A: Swift-XRT refined Analysis
  47. GRB 120817B: Fermi GBM detection
  48. IPN Triangulation of GRB 120817B (short/very intense)
  49. GRB 120817A: Swift-BAT refined analysis
  50. GRB 120817A: Enhanced Swift-XRT position
  51. GRB 120815A: Swift/UVOT Detection of the Optical Afterglow
  52. GRB 120816A: Bassano Bresciano Observatory optical observations
  53. GRB 120816A: Swift-XRT refined Analysis
  54. GRB 120817A: Swift detection of a burst
  55. GRB 120816A: Enhanced Swift-XRT position
  56. GRB 120816A: Swift-BAT refined analysis
  57. GRB 120816A: TAROT Calern observatory optical observations
  58. GRB 120816A: Swift detection of a burst
  59. GRB 120815A: Swift-XRT refined Analysis
  60. GRB 120815A: Swift-BAT refined analysis
  61. GRB 120805A: Liverpool Telescope optical candidate detection
  62. GRB 120815A: Enhanced Swift-XRT position
  63. GRB 120815A: TAROT La Silla observatory optical observations
  64. GRB 120815A: Swift detection of a burst
  65. GRB 120811B: Fermi GBM observation
  66. GCN for GRB 120811C
  67. GRB120804A: Chandra observations and afterglow detection
  68. GRB 120805A: optical afterglow confirmation from the NOT
  69. GRB 120805A: Enhanced Swift-XRT position
  70. GRB 120811C: Swift-BAT refined analysis
  71. GRB 120811A: Swift-BAT refined analysis
  72. GRB 120811C: Bassano Bresciano Observatory optical observations
  73. GRB 120811C: Swift-XRT refined Analysis
  74. Improved IPN error box for short hard GRB 120811B
  75. GRB 120811C: RTT150 optical observations
  76. GRB 120811C: Enhanced Swift-XRT position
  77. GRB 120811C: TAROT Calern observatory optical observations
  78. GRB 120811C: MASTER-Amur observations of fading OT
  79. GRB 120811C: Swift detection of a burst with an optical counterpart
  80. Konus-Wind observation of GRB 120811B
  81. IPN Triangulation of short hard GRB 120811B
  82. Swift Trigger 530581: GRB 120811A or a galactic transient
  83. GRB 120803A: Confirmation of the X-ray afterglow
  84. GRB 120804A: Konus-Wind and Swift/BAT joint spectral analysis
  85. GRB 120804A: ATCA 34GHz upper limit
  86. GRB 120807A: Swift-XRT refined Analysis
  87. GRB 120802A: optical observations
  88. GRB 120807A: Fermi/LAT upper limit
  89. GRB 120807A: TAROT La Silla observatory optical observations
  90. GRB 120807A: Swift-BAT refined analysis
  91. GRB 120807A: Enhanced Swift-XRT position
  92. GRB 120807A: Swift detection of a burst
  93. GRB 120804A: ATCA 34GHz upper limit
  94. Fermi/GBM detection of an SGR-like burst
  95. Swift trigger 530214: uncertain if real or not
  96. Swift-BAT trigger 529813 is due to noise while entering the SAA
  97. GRB 120728A: Fermi GBM observation
  98. GRB 120805A: Swift-BAT refined analysis
  99. GRB120805A: Liverpool Telescope observations
  100. GRB 120805A: TAROT Calern observatory optical observations

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