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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"

26518 results found.

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

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