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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"

45777 results found.

  1. GRB 130831A: optical observations
  2. GRB 130831A: Optical Observations via Virtual Telescope
  3. GRB 130831A: Swift-XRT refined Analysis
  4. GRB 130831A: Montarrenti Observatory optical observations
  5. GRB 130831B: Enhanced Swift-XRT position
  6. GRB 130831A: Skynet/PROMPT-SSO detections
  7. GRB 130831A: Enhanced Swift-XRT position
  8. GRB 130831A : Xinglong 60cm optical observation
  9. Konus-Wind observation of GRB 130831A
  10. GRB 130831A: Gemini-North Redshift
  11. GRB 130831A: MITSuME Akeno Optical observation
  12. GRB 130831A: Weihai optical observations
  13. GRB 130831B: Swift detection of a burst
  14. GRB 130831A: Faulkes Telescope North and South optical afterglow
  15. GRB 130831A: Swift detection of a burst with an optical counterpart
  16. IPN triangulation of GRB 130828A - error box
  17. GRB 130822A: optical upper limits
  18. GRB 130829A: AAO optical observations
  19. GRB 130828A: Swift XRT and UVOT observations
  20. GRB 130829A: NOT optical observations
  21. Correction to GCN 15132 - GRB 130828A
  22. IPN triangulation of GRB 130828A
  23. GRB 130829A: Swift detection of a burst
  24. GRB 130828A Tiled Swift observations
  25. GRB 130828A: Fermi GBM detection
  26. GRB 130828A: Fermi-LAT detection of a burst
  27. IPN triangulation of GRB130821A
  28. Konus-Wind observation of GRB 130821A
  29. GRB 130821A: Weihai optical upper limit
  30. GRB 130821A: Swift-XRT observation
  31. GRB 130822A: 5.8 GHz VLA upper limit
  32. GRB 130822A: Gemini Observations
  33. GRB 130822A: Swift-XRT refined Analysis
  34. GRB 130822A: WHT ACAM observations
  35. GRB 130822A: Swift/UVOT Upper Limits
  36. GRB 130822A: Enhanced Swift-XRT position
  37. GRB 130822A, Swift-BAT refined analysis
  38. GRB 130821A: Fermi-LAT detection of a burst
  39. GRB 130822A: Weihai optical upper limit
  40. GRB 130821A: Fermi GBM Detection
  41. GRB 130822A: Swift detection of a short burst
  42. GRB 130816A: Swift/UVOT Upper Limits
  43. GRB 130816B: Swift/UVOT Upper Limits
  44. Fermi Gamma-ray Burst Monitor trigger 398555975 / 130818916 is not a GRB
  45. GRB 130816B, Swift-BAT refined analysis
  46. GRB 130816B: GROND afterglow candidate
  47. GRB 130816A: Swift-XRT refined Analysis
  48. GRB 130816A, Swift-BAT refined analysis
  49. GRB 130816A: Fermi GBM observation
  50. GRB 130816B: Swift-XRT refined Analysis
  51. GRB 130816B: Enhanced Swift-XRT position
  52. GRB 130816A: GROND confirmation of afterglow
  53. GRB 130816A: Enhanced Swift-XRT position
  54. GRB 130816B: Swift detection of a burst
  55. GRB 130816A: REM NIR candidate afterglow
  56. GRB 130816A: Swift detection of a burst
  57. Refined IPN Triangulation of GRB 130812B
  58. Konus-Wind observation of GRB 130812B
  59. IPN Triangulation of GRB 130812B (long/soft)
  60. GRB 130812A: Swift/UVOT Upper Limits
  61. GRB 130812A, Swift-BAT refined analysis
  62. GRB 130812A: GROND upper limits
  63. GRB 130812A: Swift-XRT refined Analysis
  64. GRB 130812A: Enhanced Swift-XRT position
  65. GRB 130812A: Swift detection of a burst
  66. Correction to GCN Circ. 15086 "GRB130807A: Swift/UVOT observations"
  67. GRB130807A: Swift/UVOT observations
  68. GRB 130807A: Swift-XRT refined analysis
  69. GRB 130806A: Swift/UVOT Upper Limits
  70. GRB 130807A, Swift-BAT refined analysis
  71. GRB 130807A: Swift detection of a GRB or Galactic transient
  72. Konus-Wind observation of GRB 130804A
  73. GRB 130623A: GROND detection of the optical/NIR afterglow
  74. GRB 130806A: MITSuME Akeno Optical observation
  75. GRB 130806A: Swift-XRT refined Analysis
  76. GRB 130806A: MITSuME Okayama upper limits
  77. GRB 130806A, Swift-BAT refined analysis
  78. IPN localization of GRB 130804A
  79. SGR 1745-29 (Swift trigger 565443), Swift-BAT refined analysis
  80. GRB130803A: GROND observations
  81. GRB 130806A: Enhanced Swift-XRT position
  82. GRB 130806A: Swift detection of a burst
  83. GRB 130804A; Fermi GBM observation
  84. Trigger 565443: Swift detection of a burst from SGR J1745-29
  85. GRB 130803A: Swift-XRT refined Analysis
  86. GRB 130803A: RATIR Optical and NIR Observations
  87. GRB130803A: GROND detection of possible host
  88. GRB 130803A: Swift/UVOT Upper Limits
  89. GRB 130803A; Fermi GBM observation
  90. GRB 130803A, Swift-BAT refined analysis
  91. GRB 130803A: Enhanced Swift-XRT position
  92. GRB 130803A: Faulkes Telescope South Observations
  93. GRB 130603B: Second epoch of HST WFC/F160W imaging
  94. GRB 130803A: Swift detection of a burst
  95. GRB 130727A: Watcher optical limit
  96. GRB 130722A: RATIR Optical Observations
  97. GRB 130727A: Swift/UVOT Detection
  98. Konus-Wind observation of GRB 130727A
  99. GRB 130727A: Swift-XRT refined Analysis
  100. GRB 130727A: Fermi GBM detection

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