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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"

14950 results found.

  1. Konus-Wind observation of GRB 120911B
  2. GRB 120911B: Fermi-LAT detection of a burst
  3. GRB 120911A: Swift detection of a burst
  4. GRB 120908A: Fermi GBM detection
  5. GRB 120909A: Pi of the Sky upper limits
  6. GRB 120909A: Swift/UVOT Detection
  7. GRB 120908A: MAXI/GSC detection
  8. GRB 120909A: GROND detection of the afterglow
  9. GRB 120909A: Swift detection of a burst
  10. GRB 120907A: Swift/UVOT Detection
  11. GRB 120907A: Fermi GBM detection
  12. GRB 120907A: Swift detection of a burst with optical counterpart
  13. Konus-Wind observation of GRB 120830A
  14. GRB 120830A: Fermi-LAT detection of a short burst
  15. GRB 120821A: GROND upper limits
  16. GRB 120819A: GROND afterglow confirmation
  17. GRB 120819A: Swift detection of a burst
  18. GRB 120816A: Swift/UVOT Detection of the Optical Afterglow
  19. Konus-Wind observation of GRB 120817B
  20. GRB 120817B: Fermi GBM detection
  21. GRB 120815A: Swift/UVOT Detection of the Optical Afterglow
  22. GRB 120817A: FTN and FTS observations
  23. GRB 120817A: Swift detection of a burst
  24. GRB 120816A: BOOTES-2 observations
  25. GRB 120816A: Swift detection of a burst
  26. GRB 120805A: Liverpool Telescope optical candidate detection
  27. GRB 120815A: Swift detection of a burst
  28. GRB120804A: Chandra observations and afterglow detection
  29. GRB 120811C: Swift/UVOT Detection
  30. GRB 120811C: Swift detection of a burst with an optical counterpart
  31. Trigger 530588: Swift detection of XMM J174457-2850.3
  32. GRB 120714B: GROND/FORS2 detection of a supernova
  33. GRB 120804A: Gemini-North detection of an optical afterglow and putative host galaxy
  34. GRB 120807A: Swift detection of a burst
  35. Fermi/GBM detection of an SGR-like burst
  36. Swift trigger 530214: uncertain if real or not
  37. GRB120805A: Liverpool Telescope observations
  38. GRB 120805A: Swift detection of a burst
  39. GRB 120804A: EVLA Detection
  40. GRB 120804A: Swift detection of a short burst
  41. GRB 120803A: Swift-BAT refined analysis
  42. GRB 120803B: FTN possible afterglow candidate
  43. GRB 120803B: Swift detection of a burst
  44. GRB 120803A: Swift detection of a possible burst
  45. GRB 120802A: Swift detection of a burst
  46. GRB 120728B: Fermi GBM detection
  47. Konus-Wind observation of GRB 120728B
  48. GRB 120729A: break in the optical light curve
  49. T100 observations of GRB 120729A
  50. GRB 120729A: Swift/UVOT Detection
  51. GRB120729A - Faulkes Telescope North Optical Afterglow Candidate
  52. GRB 120729A: Swift detection of a burst with an optical afterglow
  53. Trigger 529076: Swift possible detection of SwJ1910.2-0546
  54. GRB 120728A: Swift detection of a burst
  55. GRB 120727A/Galactic source: Fermi-LAT detection of a transient source
  56. Swift Trigger 528925 is probably a noise fluctuation
  57. GRB 120724A: Swift/UVOT Detection of the Optical Afterglow
  58. GRB 120724A: Swift detection of a burst
  59. GRB 120722A: GROND detection of the afterglow
  60. GRB 120722A: Swift detection of a burst
  61. GRB 120716A: EVLA Detection
  62. GRB 120716A: Swift-XRT detection
  63. Konus-Wind observation of GRB 120716A
  64. GRB 120714B: Swift/UVOT Detection
  65. Trigger 526660: Swift detection of 1 E 1841-045 (aka Kes 73)
  66. GRB 120624B: VLA Observations
  67. GRB 120714B: Swift detection of a burst
  68. GRB 120711A: INTEGRAL/SPI observations
  69. GRB120714A: UVOT non-detection
  70. GRB 120714A: Swift detection of a burst
  71. GRB 120712A: Swift/UVOT Detection
  72. GRB 120712A: GROND Detection of the Optical/NIR Afterglow Candidate and photo-z
  73. GRB 120712A: Swift detection of a burst with optical afterglow
  74. GRB 120711A: Fermi LAT Detection
  75. GRB 120711A: Swift/UVOT Observations
  76. Konus-Wind observation of GRB 120711A
  77. GRB 120711A: Fermi LAT detection
  78. GRB 120711A: MASTER early OT detection
  79. Konus-Wind observation of GRB 120709A
  80. GRB 120711A: REM NIR early time detection
  81. GRB 120711A: GROND photometric redshift
  82. GRB 120711A: MAXI/GSC detection
  83. Swift detection of GRB 120711B or a new Galactic transient
  84. GRB 120709A: Fermi GBM detection
  85. GRB 120709A: Fermi-LAT Detection
  86. GRB 120707A: Fermi GBM Detection of a Bright Burst
  87. GRB 120624B: mm detection at PdBI
  88. GRB 120703A: Swift/UVOT Detection
  89. GRB 120703A: Fermi GBM detection
  90. GRB 120701A: Swift/UVOT Detection
  91. GRB 120701A: GROND detection of the afterglow
  92. GRB 120703A: Swift detection of a bright burst with an optical afterglow
  93. GRB 120701A: Swift-XRT afterglow detection and analysis
  94. Swift Trigger 525554 is probably not a GRB
  95. GRB120624B: Chandra observations and afterglow detection
  96. GRB 120624B: GROND upper limits
  97. XRF 120626B: MAXI/GSC detection
  98. Swift detection of Ginga 0834-430
  99. Swift detection of IGR J17062-6143
  100. GRB 120624B: optical observations

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