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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"

28259 results found.

  1. GRB 120419A: Swift XRT confirmation of the afterglow
  2. GRB 130907A: WSRT radio detection
  3. GRB 130828A: Further Swift XRT observations
  4. GRB 130907A, Swift-BAT refined analysis
  5. GRB 130907A: T21 optical observations
  6. GRB 130907A: VLA detection
  7. GRB 130907A: Swift-XRT refined Analysis
  8. GRB 130907A: Enhanced Swift-XRT position
  9. Errata of GRB name in GCN 15196: should have been GRB 130907A instead of GRB 120916A
  10. GRB 120916A: Fermi-LAT detection of a burst
  11. GRB 130907A: Swift/UVOT Detection
  12. GRB 130907A: Early Tautenburg detections, red afterglow
  13. GRB 130907A: Skynet DSO-14/Yerkes-41/GORT confirmation of a fading afterglow
  14. GRB 130907A: RATIR Optical and NIR Afterglow Confirmation
  15. GRB 130907A: Skynet DSO-14/Yerkes-41 detections of a possible afterglow
  16. GRB 130831A: Maidanak optical observations
  17. GRB 130831A: optical observation in Chuguev AO
  18. GRB 130831A: ISON-Kislovodsk optical observations
  19. GRB 130907A: NOT redshift
  20. GRB 130831A: optical observation in Gissar AO
  21. GRB 130831A: ISON-UAFO optical observations
  22. GRB 130907A: Swift detection of a burst with an optical counterpart
  23. Swift follow-up results of the possible weak INTEGRAL GRB
  24. GRB 130903A: Swift/UVOT Upper Limits
  25. Swift follow-up of an INTEGRAL possible weak GRB
  26. GRB 130831A: RATIR Optical and NIR Upper Limits
  27. GRB 130822A: nearby galaxy redshifts
  28. GRB 130903A: GROND Afterglow Discovery
  29. GRB 130903A: Fermi GBM observation
  30. GRB 130903A: Swift-XRT observations
  31. Swift trigger 569022 is a new Galactic source Swift J1734.5-3027
  32. GRB 130831A: Swift/UVOT Observations
  33. GRB 130831A: Montarrenti Observatory optical follow-up
  34. GRB 130831A: Optical Observations via Virtual Telescope, follow-up
  35. GRB 130831A: RATIR Optical and NIR Observations
  36. GRB 130831A: Continued Skynet/PROMPT-SSO, PROMPT-CTIO and Yerkes-41 detections
  37. GRB 130831A: VLA Observations
  38. GRB 130831B: Swift/UVOT Upper Limits
  39. GRB 130831B: GROND upper limits
  40. Swift Trigger 569022: a possible GRB
  41. GRB 130831A: THO optical observation
  42. GRB 130831B: Swift-XRT refined Analysis
  43. GRB 130831A: optical observations
  44. GRB 130831A: Swift-XRT refined Analysis
  45. GRB 130831A: Montarrenti Observatory optical observations
  46. GRB 130831B: Enhanced Swift-XRT position
  47. GRB 130831A: Skynet/PROMPT-SSO detections
  48. GRB 130831A: Enhanced Swift-XRT position
  49. GRB 130831A: Gemini-North Redshift
  50. GRB 130831A: MITSuME Akeno Optical observation
  51. GRB 130831A: Weihai optical observations
  52. GRB 130831B: Swift detection of a burst
  53. GRB 130831A: Faulkes Telescope North and South optical afterglow
  54. GRB 130831A: Swift detection of a burst with an optical counterpart
  55. IPN triangulation of GRB 130828A - error box
  56. GRB 130822A: optical upper limits
  57. GRB 130828A: Swift XRT and UVOT observations
  58. GRB 130829A: Swift detection of a burst
  59. GRB 130828A Tiled Swift observations
  60. GRB 130828A: Fermi GBM detection
  61. GRB 130828A: Fermi-LAT detection of a burst
  62. IPN triangulation of GRB130821A
  63. Konus-Wind observation of GRB 130821A
  64. GRB 130821A: Weihai optical upper limit
  65. GRB 130821A: Swift-XRT observation
  66. GRB 130822A: 5.8 GHz VLA upper limit
  67. GRB 130822A: Gemini Observations
  68. GRB 130822A: Swift-XRT refined Analysis
  69. GRB 130822A: WHT ACAM observations
  70. GRB 130822A: Swift/UVOT Upper Limits
  71. GRB 130822A: Enhanced Swift-XRT position
  72. GRB 130821A: Fermi-LAT detection of a burst
  73. GRB 130822A: Weihai optical upper limit
  74. GRB 130821A: Fermi GBM Detection
  75. GRB 130822A: Swift detection of a short burst
  76. GRB 130816A: Swift/UVOT Upper Limits
  77. GRB 130816B: Swift/UVOT Upper Limits
  78. GRB 130816B: GROND afterglow candidate
  79. GRB 130816A: Swift-XRT refined Analysis
  80. GRB 130816B: Swift-XRT refined Analysis
  81. GRB 130816B: Enhanced Swift-XRT position
  82. GRB 130816A: GROND confirmation of afterglow
  83. GRB 130816A: Enhanced Swift-XRT position
  84. GRB 130816B: Swift detection of a burst
  85. GRB 130816A: REM NIR candidate afterglow
  86. GRB 130816A: Swift detection of a burst
  87. GRB 130812A: Swift/UVOT Upper Limits
  88. GRB 130812A: GROND upper limits
  89. GRB 130812A: Swift-XRT refined Analysis
  90. GRB 130812A: Enhanced Swift-XRT position
  91. GRB 130812A: Swift detection of a burst
  92. GRB130807A: Swift/UVOT observations
  93. GRB 130807A: Swift-XRT refined analysis
  94. GRB 130806A: Swift/UVOT Upper Limits
  95. GRB 130807A, Swift-BAT refined analysis
  96. GRB 130807A: Swift detection of a GRB or Galactic transient
  97. Konus-Wind observation of GRB 130804A
  98. GRB 130623A: GROND detection of the optical/NIR afterglow
  99. GRB 130806A: MITSuME Akeno Optical observation
  100. GRB 130806A: Swift-XRT refined Analysis

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