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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"

11632 results found.

  1. GRB 140304A: Suzaku WAM observation of the prompt emission
  2. GRB 140306A: Suzaku WAM observation of the prompt emission
  3. Konus-Wind observation of GRB 140306A
  4. IPN Triangulation of GRB 140306A
  5. GRB 140306A: Fermi GBM detection
  6. GRB 140304A: Fermi GBM detection
  7. GRB140302A: Fermi GBM detection
  8. IPN triangulation of GRB 140226A, a possible GRB counterpart to iPTF14yb
  9. GRB 140219A: Suzaku WAM observation of the prompt emission
  10. GRB 140219A: iPTF optical observations
  11. GRB 140219A: MASTER before and after GRB observational arguments of the exceptionally Dark GRB
  12. Konus-Wind observation of exceptionally bright GRB 140219A
  13. GRB 140219A: Fermi-LAT detection of a burst
  14. GRB 140219A: Fermi GBM Detection
  15. IPN Triangulation of extremely bright long GRB 140219A
  16. Fermi GBM trigger 140214230 is not a GRB
  17. Konus-Wind observation of GRB 140213A
  18. GRB 140213A: Fermi GBM Detection
  19. Konus-Wind observation of GRB 140209A
  20. GRB 140209A: Fermi GBM observation
  21. GRB 140206A: Mondy optical observations
  22. GRB 140206A: Liverpool Telescope optical afterglow observations
  23. Konus-Wind observation of GRB 140206B
  24. GRB 140206A: Fermi GBM detection
  25. GRB 140206B: Fermi-LAT detection
  26. GRB 140206B: Fermi GBM detection
  27. GRB 140122A/Fermi412093190: MASTER-Net early optical observations
  28. Fermi412093190: iPTF optical counterpart search
  29. GRB 140118A: Fermi GBM observation
  30. GRB 140110A: Further Swift-XRT Observation
  31. GRB 140104B: Further Swift XRT observations
  32. Fermi Gamma-ray Burst Monitor trigger 411362827 is not a GRB
  33. IPN Triangulation of GRB 140110A
  34. GRB 140110A: Swift/UVOT Observations
  35. GRB 140104B: Suzaku WAM observation of the prompt emission
  36. GRB 140110A: Swift XRT observations
  37. GRB 140110A: Fermi GBM observation
  38. GRB 140110A Tiled Swift observations
  39. GRB 140110A: Fermi-LAT detection of a burst
  40. GRB 140105A: MASTER-Net early optical observations and time correction
  41. GRB 131231A: AAO optical observations
  42. GRB 140108A: Fermi GBM detection
  43. New Fermi-LAT GRB Table
  44. GRB 140105A: HCT Observations
  45. GRB 140105A: continued iPTF observations and rejection of optical candidates
  46. GRB 140105A: Swift XRT observations
  47. GRB 140104B: Swift XRT observations
  48. GRB 140105A: Fermi GBM detection
  49. GRB 140104B: Fermi GBM observation
  50. Fermi410578384: iPTF optical afterglow candidates for a possible short GRB
  51. GRB 140102A: BOOTES-4 early optical observations
  52. GRB 140104B: Fermi-LAT detection of a burst
  53. GRB 131209A: Further Swift XRT observations
  54. GRB 131231A, Optical Observations
  55. GRB 140102A: P60 observations
  56. GRB 131231A: Swift/UVOT Observations of the Optical Afterglow
  57. GRB 131231A: Fermi GBM correction to GCN 15644
  58. Konus-Wind observation of GRB 131231A
  59. GRB 140102A: Fermi/GBM Observation
  60. Konus-Wind observation of GRB 140102A
  61. GRB 140102A: Fermi-LAT detection of a burst
  62. GRB 131229A: Fermi GBM detection
  63. GRB 131231A: Swift-XRT observations
  64. GRB 131231A: VLT/X-shooter redshift
  65. GRB 131231A: Fermi GBM detection
  66. GRB 131231A: iPTF optical afterglow candidate coincident with Nanshan detection
  67. GRB 131231A: afterglow confirmation from the NOT
  68. GRB 131231A: Nanshan afterglow candidate
  69. GRB 131231A: Fermi-LAT detection of a burst
  70. GRB 131216A: Suzaku WAM observation of the prompt emission
  71. Fermi Gamma-ray Burst Monitor trigger 409187680/131219968 is not a GRB
  72. IPN Triangulation of GRB 131216A
  73. GRB 131216A: Fermi GBM observation
  74. GRB 131216A: Fermi-LAT detection of a burst
  75. GRB 131209A: Swift XRT and UVOT observations
  76. GRB 131209A: Fermi GBM observation
  77. GRB 131209A Tiled Swift observations
  78. Konus-Wind observation of GRB 131209A
  79. IPN Triangulation of GRB 131209A
  80. GRB 131209A: Fermi-LAT detection of a burst
  81. GRB 131127B: archival confirmation of iPTF13ecv as a CV
  82. GRB 131127B: rejection of optical counterpart candidates
  83. GRB 131126A: Fermi GBM observation
  84. GRB 131126A: iPTF upper limits on the afterglow of a short GRB
  85. GRB 131202A: Fermi GBM Detection
  86. GRB 131128A; Fermi GBM observation
  87. GRB 131125A: MASTER-Net very early optical observations
  88. GRB 131125A: iPTF upper limits on the afterglow of a short GRB
  89. IPN Triangulation of GRB 131126A (short/hard)
  90. IPN Triangulation of GRB 131125A (short/hard)
  91. GRB 131127B: Bassano Bresciano Observatory optical observations
  92. GRB 131127B: Nanshan optical observations
  93. Konus-Wind observation of GRB 131127B
  94. IPN Triangulation of GRB 131127B
  95. GRB 131127B: Fermi GBM detection
  96. Fermi407254341: iPTF optical afterglow candidates
  97. Konus-Wind observation of GRB 131118A
  98. IPN Triangulation of GRB 131118A
  99. Fermi Gamma-ray Burst Monitor trigger 406601061 / 131120031 is not a GRB
  100. GRB 131118A: Fermi GBM detection

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