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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"

42538 results found.

  1. GRB 130831A: THO optical observation
  2. GRB 130831A, Swift-BAT refined analysis
  3. GRB 130831B: Swift-XRT refined Analysis
  4. GRB 130831A: optical observations
  5. GRB 130831A: Optical Observations via Virtual Telescope
  6. GRB 130831A: Swift-XRT refined Analysis
  7. GRB 130831A: Montarrenti Observatory optical observations
  8. GRB 130831B: Enhanced Swift-XRT position
  9. GRB 130831A: Skynet/PROMPT-SSO detections
  10. GRB 130831A: Enhanced Swift-XRT position
  11. GRB 130831A : Xinglong 60cm optical observation
  12. Konus-Wind observation of GRB 130831A
  13. GRB 130831A: Gemini-North Redshift
  14. GRB 130831A: MITSuME Akeno Optical observation
  15. GRB 130831A: Weihai optical observations
  16. GRB 130831B: Swift detection of a burst
  17. GRB 130831A: Faulkes Telescope North and South optical afterglow
  18. GRB 130831A: Swift detection of a burst with an optical counterpart
  19. GRB 130822A: optical upper limits
  20. GRB 130829A: AAO optical observations
  21. GRB 130828A: Swift XRT and UVOT observations
  22. GRB 130829A: NOT optical observations
  23. IPN triangulation of GRB 130828A
  24. GRB 130829A: Swift detection of a burst
  25. GRB 130828A Tiled Swift observations
  26. GRB 130828A: Fermi GBM detection
  27. GRB 130828A: Fermi-LAT detection of a burst
  28. IPN triangulation of GRB130821A
  29. GRB 130822A Swift-BAT Spectral lag analysis
  30. Konus-Wind observation of GRB 130821A
  31. GRB 130821A: Weihai optical upper limit
  32. GRB 130821A: Swift-XRT observation
  33. GRB 130822A: 5.8 GHz VLA upper limit
  34. GRB 130822A: Gemini Observations
  35. GRB 130822A: Swift-XRT refined Analysis
  36. GRB 130822A: WHT ACAM observations
  37. GRB 130822A: Swift/UVOT Upper Limits
  38. GRB 130822A: Enhanced Swift-XRT position
  39. GRB 130822A, Swift-BAT refined analysis
  40. GRB 130821A: Fermi-LAT detection of a burst
  41. GRB 130822A: Weihai optical upper limit
  42. GRB 130821A: Fermi GBM Detection
  43. GRB 130822A: Swift detection of a short burst
  44. GRB 130816A: Swift/UVOT Upper Limits
  45. GRB 130816B: Swift/UVOT Upper Limits
  46. GRB 130816B, Swift-BAT refined analysis
  47. GRB 130816B: GROND afterglow candidate
  48. GRB 130816A: Swift-XRT refined Analysis
  49. GRB 130816A, Swift-BAT refined analysis
  50. GRB 130816A: Fermi GBM observation
  51. GRB 130816B: Swift-XRT refined Analysis
  52. GRB 130816B: Enhanced Swift-XRT position
  53. GRB 130816A: GROND confirmation of afterglow
  54. GRB 130816A: Enhanced Swift-XRT position
  55. GRB 130816B: Swift detection of a burst
  56. GRB 130816A: REM NIR candidate afterglow
  57. GRB 130816A: Swift detection of a burst
  58. Konus-Wind observation of GRB 130812B
  59. GRB 130812A: Swift/UVOT Upper Limits
  60. GRB 130812A, Swift-BAT refined analysis
  61. GRB 130812A: GROND upper limits
  62. GRB 130812A: Swift-XRT refined Analysis
  63. GRB 130812A: Enhanced Swift-XRT position
  64. GRB 130812A: Swift detection of a burst
  65. Correction to GCN Circ. 15086 "GRB130807A: Swift/UVOT observations"
  66. GRB130807A: Swift/UVOT observations
  67. GRB 130807A: Swift-XRT refined analysis
  68. GRB 130806A: Swift/UVOT Upper Limits
  69. GRB 130807A, Swift-BAT refined analysis
  70. GRB 130807A: Swift detection of a GRB or Galactic transient
  71. Konus-Wind observation of GRB 130804A
  72. GRB 130623A: GROND detection of the optical/NIR afterglow
  73. GRB 130806A: MITSuME Akeno Optical observation
  74. GRB 130806A: Swift-XRT refined Analysis
  75. GRB 130806A: MITSuME Okayama upper limits
  76. GRB 130806A, Swift-BAT refined analysis
  77. SGR 1745-29 (Swift trigger 565443), Swift-BAT refined analysis
  78. GRB130803A: GROND observations
  79. GRB 130806A: Enhanced Swift-XRT position
  80. GRB 130806A: Swift detection of a burst
  81. GRB 130804A; Fermi GBM observation
  82. Trigger 565443: Swift detection of a burst from SGR J1745-29
  83. GRB 130803A: Swift-XRT refined Analysis
  84. GRB 130803A: RATIR Optical and NIR Observations
  85. GRB130803A: GROND detection of possible host
  86. GRB 130803A: Swift/UVOT Upper Limits
  87. GRB 130803A; Fermi GBM observation
  88. GRB 130803A, Swift-BAT refined analysis
  89. GRB 130803A: Enhanced Swift-XRT position
  90. GRB 130603B: Second epoch of HST WFC/F160W imaging
  91. GRB 130803A: Swift detection of a burst
  92. GRB 130727A: Watcher optical limit
  93. GRB 130722A: RATIR Optical Observations
  94. GRB 130727A: Swift/UVOT Detection
  95. Konus-Wind observation of GRB 130727A
  96. GRB 130727A: Swift-XRT refined Analysis
  97. GRB 130727A: Fermi GBM detection
  98. GRB 130727A: GROND observations
  99. GRB 130727A: Enhanced Swift-XRT position
  100. GRB 130727A: Faulkes Telescope South optical afterglow

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