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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"

11552 results found.

  1. GRB 140329A: Fermi-LAT detection
  2. Konus-Wind observation of GRB 140329A
  3. IPN Triangulation of GRB 140329A
  4. GRB 140329A: Fermi GBM observation of a bright burst
  5. GRB 140323A : Suzaku WAM observation of the prompt emission
  6. Fermi Gamma-ray Burst Monitor trigger 417486540 / 140326020 is not a GRB
  7. Konus-Wind observation of GRB 140323A
  8. GRB 140323A: Fermi-LAT detection
  9. GRB 140323A: Fermi GBM observation
  10. GRB 140320A: Swift-BAT refined analysis
  11. GRB 140320A: Fermi GBM detection
  12. GRB 140320A: Fermi GBM observations suggest a short GRB
  13. GRB 140320A: Swift detection of a burst
  14. GRB 140311C: MASTER optical observations
  15. GRB 140311C: Swift-XRT and UVOT observations
  16. GRB 140311C: MASTER before, during and after trigger optical observations
  17. GRB 140311C: Fermi GBM Detection
  18. GRB 140311B: Fermi GBM Detection
  19. Fermi416242156: possible iPTF counterpart
  20. GRO J1744-28: Fermi GBM observation
  21. GRB 140304A: Suzaku WAM observation of the prompt emission
  22. GRB 140306A: Suzaku WAM observation of the prompt emission
  23. Konus-Wind observation of GRB 140306A
  24. IPN Triangulation of GRB 140306A
  25. GRB 140306A: Fermi GBM detection
  26. GRB 140304A: Fermi GBM detection
  27. GRB140302A: Fermi GBM detection
  28. IPN triangulation of GRB 140226A, a possible GRB counterpart to iPTF14yb
  29. GRB 140219A: Suzaku WAM observation of the prompt emission
  30. GRB 140219A: iPTF optical observations
  31. GRB 140219A: MASTER before and after GRB observational arguments of the exceptionally Dark GRB
  32. Konus-Wind observation of exceptionally bright GRB 140219A
  33. GRB 140219A: Fermi-LAT detection of a burst
  34. GRB 140219A: Fermi GBM Detection
  35. IPN Triangulation of extremely bright long GRB 140219A
  36. Fermi GBM trigger 140214230 is not a GRB
  37. Konus-Wind observation of GRB 140213A
  38. GRB 140213A: Fermi GBM Detection
  39. Konus-Wind observation of GRB 140209A
  40. GRB 140209A: Fermi GBM observation
  41. GRB 140206A: Mondy optical observations
  42. GRB 140206A: Liverpool Telescope optical afterglow observations
  43. Konus-Wind observation of GRB 140206B
  44. GRB 140206A: Fermi GBM detection
  45. GRB 140206B: Fermi-LAT detection
  46. GRB 140206B: Fermi GBM detection
  47. GRB 140122A/Fermi412093190: MASTER-Net early optical observations
  48. Fermi412093190: iPTF optical counterpart search
  49. GRB 140118A: Fermi GBM observation
  50. GRB 140110A: Further Swift-XRT Observation
  51. GRB 140104B: Further Swift XRT observations
  52. Fermi Gamma-ray Burst Monitor trigger 411362827 is not a GRB
  53. IPN Triangulation of GRB 140110A
  54. GRB 140110A: Swift/UVOT Observations
  55. GRB 140104B: Suzaku WAM observation of the prompt emission
  56. GRB 140110A: Swift XRT observations
  57. GRB 140110A: Fermi GBM observation
  58. GRB 140110A Tiled Swift observations
  59. GRB 140110A: Fermi-LAT detection of a burst
  60. GRB 140105A: MASTER-Net early optical observations and time correction
  61. GRB 131231A: AAO optical observations
  62. GRB 140108A: Fermi GBM detection
  63. New Fermi-LAT GRB Table
  64. GRB 140105A: HCT Observations
  65. GRB 140105A: continued iPTF observations and rejection of optical candidates
  66. GRB 140105A: Swift XRT observations
  67. GRB 140104B: Swift XRT observations
  68. GRB 140105A: Fermi GBM detection
  69. GRB 140104B: Fermi GBM observation
  70. Fermi410578384: iPTF optical afterglow candidates for a possible short GRB
  71. GRB 140102A: BOOTES-4 early optical observations
  72. GRB 140104B: Fermi-LAT detection of a burst
  73. GRB 131209A: Further Swift XRT observations
  74. GRB 131231A, Optical Observations
  75. GRB 140102A: P60 observations
  76. GRB 131231A: Swift/UVOT Observations of the Optical Afterglow
  77. GRB 131231A: Fermi GBM correction to GCN 15644
  78. Konus-Wind observation of GRB 131231A
  79. GRB 140102A: Fermi/GBM Observation
  80. Konus-Wind observation of GRB 140102A
  81. GRB 140102A: Fermi-LAT detection of a burst
  82. GRB 131229A: Fermi GBM detection
  83. GRB 131231A: Swift-XRT observations
  84. GRB 131231A: VLT/X-shooter redshift
  85. GRB 131231A: Fermi GBM detection
  86. GRB 131231A: iPTF optical afterglow candidate coincident with Nanshan detection
  87. GRB 131231A: afterglow confirmation from the NOT
  88. GRB 131231A: Nanshan afterglow candidate
  89. GRB 131231A: Fermi-LAT detection of a burst
  90. GRB 131216A: Suzaku WAM observation of the prompt emission
  91. Fermi Gamma-ray Burst Monitor trigger 409187680/131219968 is not a GRB
  92. IPN Triangulation of GRB 131216A
  93. GRB 131216A: Fermi GBM observation
  94. GRB 131216A: Fermi-LAT detection of a burst
  95. GRB 131209A: Swift XRT and UVOT observations
  96. GRB 131209A: Fermi GBM observation
  97. GRB 131209A Tiled Swift observations
  98. Konus-Wind observation of GRB 131209A
  99. IPN Triangulation of GRB 131209A
  100. GRB 131209A: Fermi-LAT detection of a burst

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