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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"

11630 results found.

  1. Konus-Wind observation of GRB 140306A
  2. IPN Triangulation of GRB 140306A
  3. GRB 140306A: Fermi GBM detection
  4. GRB 140304A: Fermi GBM detection
  5. GRB140302A: Fermi GBM detection
  6. IPN triangulation of GRB 140226A, a possible GRB counterpart to iPTF14yb
  7. GRB 140219A: Suzaku WAM observation of the prompt emission
  8. GRB 140219A: iPTF optical observations
  9. GRB 140219A: MASTER before and after GRB observational arguments of the exceptionally Dark GRB
  10. Konus-Wind observation of exceptionally bright GRB 140219A
  11. GRB 140219A: Fermi-LAT detection of a burst
  12. GRB 140219A: Fermi GBM Detection
  13. IPN Triangulation of extremely bright long GRB 140219A
  14. Fermi GBM trigger 140214230 is not a GRB
  15. Konus-Wind observation of GRB 140213A
  16. GRB 140213A: Fermi GBM Detection
  17. Konus-Wind observation of GRB 140209A
  18. GRB 140209A: Fermi GBM observation
  19. GRB 140206A: Mondy optical observations
  20. GRB 140206A: Liverpool Telescope optical afterglow observations
  21. Konus-Wind observation of GRB 140206B
  22. GRB 140206A: Fermi GBM detection
  23. GRB 140206B: Fermi-LAT detection
  24. GRB 140206B: Fermi GBM detection
  25. GRB 140122A/Fermi412093190: MASTER-Net early optical observations
  26. Fermi412093190: iPTF optical counterpart search
  27. GRB 140118A: Fermi GBM observation
  28. GRB 140110A: Further Swift-XRT Observation
  29. GRB 140104B: Further Swift XRT observations
  30. Fermi Gamma-ray Burst Monitor trigger 411362827 is not a GRB
  31. IPN Triangulation of GRB 140110A
  32. GRB 140110A: Swift/UVOT Observations
  33. GRB 140104B: Suzaku WAM observation of the prompt emission
  34. GRB 140110A: Swift XRT observations
  35. GRB 140110A: Fermi GBM observation
  36. GRB 140110A Tiled Swift observations
  37. GRB 140110A: Fermi-LAT detection of a burst
  38. GRB 140105A: MASTER-Net early optical observations and time correction
  39. GRB 131231A: AAO optical observations
  40. GRB 140108A: Fermi GBM detection
  41. New Fermi-LAT GRB Table
  42. GRB 140105A: HCT Observations
  43. GRB 140105A: continued iPTF observations and rejection of optical candidates
  44. GRB 140105A: Swift XRT observations
  45. GRB 140104B: Swift XRT observations
  46. GRB 140105A: Fermi GBM detection
  47. GRB 140104B: Fermi GBM observation
  48. Fermi410578384: iPTF optical afterglow candidates for a possible short GRB
  49. GRB 140102A: BOOTES-4 early optical observations
  50. GRB 140104B: Fermi-LAT detection of a burst
  51. GRB 131209A: Further Swift XRT observations
  52. GRB 131231A, Optical Observations
  53. GRB 140102A: P60 observations
  54. GRB 131231A: Swift/UVOT Observations of the Optical Afterglow
  55. GRB 131231A: Fermi GBM correction to GCN 15644
  56. Konus-Wind observation of GRB 131231A
  57. GRB 140102A: Fermi/GBM Observation
  58. Konus-Wind observation of GRB 140102A
  59. GRB 140102A: Fermi-LAT detection of a burst
  60. GRB 131229A: Fermi GBM detection
  61. GRB 131231A: Swift-XRT observations
  62. GRB 131231A: VLT/X-shooter redshift
  63. GRB 131231A: Fermi GBM detection
  64. GRB 131231A: iPTF optical afterglow candidate coincident with Nanshan detection
  65. GRB 131231A: afterglow confirmation from the NOT
  66. GRB 131231A: Nanshan afterglow candidate
  67. GRB 131231A: Fermi-LAT detection of a burst
  68. GRB 131216A: Suzaku WAM observation of the prompt emission
  69. Fermi Gamma-ray Burst Monitor trigger 409187680/131219968 is not a GRB
  70. IPN Triangulation of GRB 131216A
  71. GRB 131216A: Fermi GBM observation
  72. GRB 131216A: Fermi-LAT detection of a burst
  73. GRB 131209A: Swift XRT and UVOT observations
  74. GRB 131209A: Fermi GBM observation
  75. GRB 131209A Tiled Swift observations
  76. Konus-Wind observation of GRB 131209A
  77. IPN Triangulation of GRB 131209A
  78. GRB 131209A: Fermi-LAT detection of a burst
  79. GRB 131127B: archival confirmation of iPTF13ecv as a CV
  80. GRB 131127B: rejection of optical counterpart candidates
  81. GRB 131126A: Fermi GBM observation
  82. GRB 131126A: iPTF upper limits on the afterglow of a short GRB
  83. GRB 131202A: Fermi GBM Detection
  84. GRB 131128A; Fermi GBM observation
  85. GRB 131125A: MASTER-Net very early optical observations
  86. GRB 131125A: iPTF upper limits on the afterglow of a short GRB
  87. IPN Triangulation of GRB 131126A (short/hard)
  88. IPN Triangulation of GRB 131125A (short/hard)
  89. GRB 131127B: Bassano Bresciano Observatory optical observations
  90. GRB 131127B: Nanshan optical observations
  91. Konus-Wind observation of GRB 131127B
  92. IPN Triangulation of GRB 131127B
  93. GRB 131127B: Fermi GBM detection
  94. Fermi407254341: iPTF optical afterglow candidates
  95. Konus-Wind observation of GRB 131118A
  96. IPN Triangulation of GRB 131118A
  97. Fermi Gamma-ray Burst Monitor trigger 406601061 / 131120031 is not a GRB
  98. GRB 131118A: Fermi GBM detection
  99. GRB 131108A: VLA Observations
  100. Fermi GBM trigger 406351590 / 131117143 is not a GRB

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