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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"

27617 results found.

  1. Swift Transient Swift J174510.8-262411: Swift-BAT refined analysis
  2. Swift Trigger 533836 is a new Galactic transient
  3. GRB 120913B: Fermi GBM observation
  4. GRB 120913B: Swift-BAT refined analysis
  5. GRB 120913A: Fermi GBM observation
  6. GRB 120913B: FRAM early follow up and detection
  7. GRB 120913A: Swift-BAT refined analysis
  8. Continued Skynet/PROMPT observations of GRB120913B
  9. GRB 120913B: TAROT La Silla observatory optical detection
  10. Skynet/PROMPT observations of GRB120913B
  11. GRB 120913B: Swift detection of a burst
  12. GRB 120913A: Swift detection of a burst
  13. GRB 120907A: optical observations of ISON-Kislovodsk
  14. GRB 120911A: optical upper limit ISON-NM
  15. GRB 120911B: Fermi-LAT detection of a burst
  16. GRB 120911A: Fermi GBM observation
  17. GRB 120911A: Fermi/LAT upper limit
  18. GRB 120911A: Swift/UVOT Upper Limits
  19. GRB 120911A: Swift-XRT refined Analysis
  20. GRB 120911A: Swift-BAT refined analysis
  21. GRB 120911A: Faulkes Telescope North observations
  22. GRB 120911A: Swift-XRT observations
  23. GRB 120911A: ROTSE-III Optical Limits
  24. GRB 120911A: Swift detection of a burst
  25. GRB 120908A and GRB 120909A : Fermi/LAT upper limit
  26. GRB 120908A: Fermi GBM detection
  27. GRB 120908A: Swift Observations
  28. GRB 120909A: TAROT La Silla observatory optical observations
  29. GRB 120909A: Pi of the Sky upper limits
  30. GRB 120909A: Fermi GBM observation
  31. Konus-Wind observation of GRB 120909A
  32. GRB 120909A: Swift/UVOT Detection
  33. GRB 120909A: Swift-XRT refined Analysis
  34. GRB 120909A: Swift-BAT refined analysis
  35. GRB 120909A: GROND detection of the afterglow
  36. Skynet/PROMPT Observations of GRB120909A
  37. GRB 120909A: Swift detection of a burst
  38. GRB 120907A: Swift/UVOT Detection
  39. GRB 120907A: Swift-XRT refined Analysis
  40. GRB 120907A: Fermi GBM detection
  41. GRB 120907A: Swift-BAT refined analysis
  42. GRB 120907A: NOT optical observations
  43. GRB 120907A: ROTSE-III Optical Limits
  44. GRB 120907A: Swift detection of a burst with optical counterpart
  45. GRB 120830A: Further Swift Observations
  46. GRB 120830A: Swift-XRT and UVOT observations
  47. GRB 120830A: Fermi GBM observation
  48. IPN Triangulation of short GRB 120830A
  49. GRB 120830A: Fermi-LAT detection of a short burst
  50. Fermi trigger 368003226 : MASTER optical observations
  51. GRB 120819A: Swift/UVOT Upper Limits
  52. GRB 120817A: Swift/UVOT Upper Limits
  53. GRB 120817B: Deep limit on the optical afterglow from du Pont and Magellan observations
  54. GRB 120821A: Swift/XRT observations
  55. GRB 120821A: Swift/UVOT Upper Limits
  56. GRB 120821A: GROND upper limits
  57. GRB 120817B - PTF Observations
  58. GRB 120817A: RAPTOR Limits During Gamma-Ray Emitting Interval
  59. GRB 120817B: BAT location in ground analysis and refined analysis
  60. GRB 120819A: Bassano Bresciano Observatory optical observations
  61. GRB 120819A: Swift-BAT refined analysis
  62. GRB 120819A: GROND afterglow confirmation
  63. GRB 120819A: Swift-XRT refined Analysis
  64. GRB 120819A: Swift detection of a burst
  65. GRB 120817B: Swift-XRT observations
  66. GRB 120816A: Swift/UVOT Detection of the Optical Afterglow
  67. IPN Triangulation of GRB 120816B (short/exceptionally intense)
  68. GRB 120817A: Swift-XRT refined Analysis
  69. GRB 120817B: Fermi GBM detection
  70. IPN Triangulation of GRB 120817B (short/very intense)
  71. GRB 120817A: Swift-BAT refined analysis
  72. GRB 120815A: Swift/UVOT Detection of the Optical Afterglow
  73. GRB 120816A: Bassano Bresciano Observatory optical observations
  74. GRB 120817A: FTN and FTS observations
  75. GRB 120816A: Swift-XRT refined Analysis
  76. GRB 120817A: Swift-XRT observations
  77. GRB 120817A: Swift detection of a burst
  78. GRB 120816A: Swift-BAT refined analysis
  79. GRB 120816A: TAROT Calern observatory optical observations
  80. GRB 120816A: ROTSE-III Optical Limits
  81. GRB 120816A: Swift detection of a burst
  82. GRB 120815A: Swift-XRT refined Analysis
  83. GRB 120815A: Swift-BAT refined analysis
  84. GRB 120805A: Liverpool Telescope optical candidate detection
  85. GRB 120815A: GROND afterglow candidate
  86. GRB 120815A: Swift-XRT observations
  87. GRB 120815A: TAROT La Silla observatory optical observations
  88. GRB 120815A: Swift detection of a burst
  89. GRB 120811B: Fermi GBM observation
  90. GCN for GRB 120811C
  91. GRB 120811A: Swift/XRT-UVOT Obseravations
  92. GRB120804A: Chandra observations and afterglow detection
  93. GRB 120811C: RTT150 optical observations
  94. GRB 120811C: MASTER-Tunka OT observations
  95. GRB 120811C: Swift-BAT refined analysis
  96. GRB 120811A: Swift-BAT refined analysis
  97. GRB 120811C: NOT redshift
  98. GRB 120811C: Bassano Bresciano Observatory optical observations
  99. GRB 120811C: Swift-XRT refined Analysis
  100. GRB 120811C: Swift/UVOT Detection

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