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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"

12383 results found.

  1. GRB 140606B / Fermi 432717114 / iPTF 14bfu: Keck redshift
  2. GRB 140606B: Fermi GBM detection
  3. Fermi 423717114: Additional P48 and P60 observations
  4. Fermi423717114: iPTF optical transient candidates
  5. GRB 140523A: further Swift-XRT observations
  6. GRB 140528A: Fermi GBM Detection
  7. IPN Triangulation of GRB 140528A
  8. Fermi GBM trigger 422752719/ 140525971 is not a GRB
  9. GRB 140523A: NOT observation
  10. Konus-Wind observation of GRB 140523A
  11. IPN Triangulation of GRB 140523A
  12. GRB 140523A: possible X-ray afterglow candidate from tiled Swift/XRT observations
  13. GRB 140523A Tiled Swift observations
  14. GRB 140523A: Fermi-LAT detection
  15. GRB 140523A: Fermi GBM detection
  16. GRB 140521A: Fermi GBM Detection
  17. GRB 140512A: MASTER prompt and afterglow optical observations
  18. GRB 140508A: VLA detection
  19. Konus-Wind observation of GRB 140512A
  20. GRB 140512A: Fermi GBM detection
  21. Swift Observations of GRB 140508A
  22. Fermi GBM Trigger 140429551 - Detection of a burst from SGR 1806-20
  23. Konus-Wind observation of GRB 140508A
  24. GRB 140508A: Swift-XRT observations
  25. GRB 140508A: SAO RAS and MASTER photometric and spectroscopic observations
  26. GRB 140508A: iPTF optical transient candidate
  27. IPN triangulation of GRB 140508A
  28. GRB 140508A: Fermi GBM detection
  29. Konus-Wind observation of GRB 140506A
  30. GRB 140506A: Fermi GBM Detection
  31. GRB 140502A: Fermi GBM observation
  32. GRB 140501A: Fermi GBM detection
  33. GRB 140428B: Fermi GBM observation
  34. IPN Triangulation of GRB 140428B (short/hard)
  35. GRB 140423A: Fermi GBM observation
  36. Konus-Wind observation of GRB 140416A
  37. IPN Triangulation of GRB 140416A (long/very intense)
  38. GRB 140416A: Fermi GBM detection
  39. Fermi418277210: iPTF optical observations
  40. GRB 140408A: Fermi GBM detection
  41. GRB 140406A: Fermi GBM observation
  42. GRB 140402A: Deep limit on the optical afterglow from Magellan observations
  43. GRB 140402A: Swift-XRT observations
  44. GRB 140402A: MASTER optical observations
  45. GRB 140402A BAT refined analysis
  46. GRB 140402A: Marginal BAT detection
  47. GRB 140402A: Fermi GBM detection
  48. GRB 140402A: Fermi-LAT detection of a burst
  49. GRB 140330A: Fermi GBM observation
  50. Retraction of the Fermi/LAT high-energy counterpart for GRB 140330A
  51. GRB 140330A: intense and persistent gamma-ray emission detected by AGILE
  52. Konus-Wind observation of GRB 140330A
  53. IPN triangulation of GRB 130330A
  54. GRB 140330A: Fermi-LAT Detection
  55. GRB 140329A: Fermi-LAT detection
  56. Konus-Wind observation of GRB 140329A
  57. IPN Triangulation of GRB 140329A
  58. GRB 140329A: Fermi GBM observation of a bright burst
  59. GRB 140323A : Suzaku WAM observation of the prompt emission
  60. Fermi Gamma-ray Burst Monitor trigger 417486540 / 140326020 is not a GRB
  61. Konus-Wind observation of GRB 140323A
  62. GRB 140323A: Fermi-LAT detection
  63. GRB 140323A: Fermi GBM observation
  64. GRB 140320A: Swift-BAT refined analysis
  65. GRB 140320A: Fermi GBM detection
  66. GRB 140320A: Fermi GBM observations suggest a short GRB
  67. GRB 140320A: Swift detection of a burst
  68. GRB 140311C: MASTER optical observations
  69. GRB 140311C: MASTER before, during and after trigger optical observations
  70. GRB 140311C: Fermi GBM Detection
  71. GRB 140311B: Fermi GBM Detection
  72. Fermi416242156: possible iPTF counterpart
  73. GRO J1744-28: Fermi GBM observation
  74. GRB 140304A: Suzaku WAM observation of the prompt emission
  75. GRB 140306A: Suzaku WAM observation of the prompt emission
  76. IPN Triangulation of GRB 140306A
  77. GRB 140306A: Fermi GBM detection
  78. GRB 140304A: Fermi GBM detection
  79. GRB140302A: Fermi GBM detection
  80. IPN triangulation of GRB 140226A, a possible GRB counterpart to iPTF14yb
  81. GRB 140219A: Suzaku WAM observation of the prompt emission
  82. GRB 140219A: iPTF optical observations
  83. GRB 140219A: MASTER before and after GRB observational arguments of the exceptionally Dark GRB
  84. GRB 140219A: Fermi-LAT detection of a burst
  85. GRB 140219A: Fermi GBM Detection
  86. IPN Triangulation of extremely bright long GRB 140219A
  87. Fermi GBM trigger 140214230 is not a GRB
  88. Konus-Wind observation of GRB 140213A
  89. GRB 140213A: Fermi GBM Detection
  90. Konus-Wind observation of GRB 140209A
  91. GRB 140209A: Fermi GBM observation
  92. GRB 140206A: Mondy optical observations
  93. GRB 140206A: Liverpool Telescope optical afterglow observations
  94. Konus-Wind observation of GRB 140206B
  95. GRB 140206A: Fermi GBM detection
  96. GRB 140206B: Fermi-LAT detection
  97. GRB 140206B: Fermi GBM detection
  98. GRB 140122A/Fermi412093190: MASTER-Net early optical observations
  99. Fermi412093190: iPTF optical counterpart search
  100. GRB 140118A: Fermi GBM observation

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