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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"

11563 results found.

  1. GRB 160325A: Fermi-LAT detection
  2. LIGO/Virgo G211117: CALET GBM Observations
  3. GRB 160325A: Fermi GBM detection
  4. Fermi Gamma-ray Burst Monitor trigger 160323546 is not a GRB
  5. GRB 160316A: CALET Gamma-Ray Burst Monitor detection
  6. GRB 160310A: Terskol 2-m observations
  7. IPN Triangulation of GRB 160310A
  8. GRB 160310A: A further Swift-XRT observation, no afterglow detected
  9. GRB 160314B: Fermi GBM observation
  10. GRB 160314B: Fermi-LAT detection
  11. Fermi GBM trigger 479509107/160312874 is not a GRB
  12. Konus-Wind observation of GRB 160310A (possible ultra-long GRB?)
  13. GRB 160310A: RATIR Optical and NIR Observations
  14. GRB 160310A: Swift-XRT observations
  15. GRB 160310A: Fermi GBM observation
  16. GRB 160310A: Swift ToO observations
  17. GRB 160310A: Fermi-LAT detection
  18. GRB 160227B: Fermi GBM detection
  19. GRB 160225B: Fermi GBM detection
  20. IPN Triangulation of GRB 160225B
  21. GRB 160225.81/FERMI Trigg 478121069: MASTER OT J095503.19-355149.4 follow up observations
  22. GRB 160225.81/FERMI Trigg 478121069: MASTER OT J095503.19-355149.4 detection
  23. Fermi GBM trigger 478156376/16022621 is not a GRB
  24. GRB 160223A: AbAO optical observations
  25. Konus-Wind observation of GRB 160219A
  26. Fermi GBM trigger 477460274/160218161 is not a GRB
  27. Fermi GBM trigger 477985003/160224234 is not a GRB
  28. GRB 160223B: Khureltogot optical observations
  29. GRB 160223A: Fermi GBM observation
  30. GRB 160223B: LCOGT-FTN optical observations
  31. GRB 160223B: Fermi GBM observation
  32. GRB 160221A: Fermi GBM observation
  33. GRB 160219A: Fermi GBM detection
  34. GRB 160220A: nIR observations at AAT
  35. IPN Triangulation of GRB 160219A (short/hard)
  36. GRB 160220A: Fermi GBM observation
  37. LIGO/Virgo G184098: MASTER arhival results
  38. Konus-Wind observation of GRB 160216A (and GRB 160216B)
  39. Fermi GBM trigger 477254668/160215781 is not a GRB
  40. GRB 160206B: Fermi GBM detection
  41. GRB 160206B: iPTF P48 Observations and Optical Transient Candidates
  42. Fermi GBM trigger 475675010/160128498 is not a GRB
  43. GRB 160118A CALET Gamma-Ray Burst Monitor detection
  44. Konus-Wind observation of GRB 160113A
  45. GRB 160106A: CALET Gamma-Ray Burst Monitor detection
  46. IPN Triangulation of GRB 160113A
  47. Konus-Wind observation of GRB 151231A
  48. GRB 160113A: Swift-XRT observations
  49. GRB 160113A: Fermi GBM detection
  50. GRB 160113A: Swift ToO observations
  51. GRB 160113A: iPTF P48 Observations and Optical Transient Candidates
  52. Konus-Wind observation of GRB 160107A
  53. IPN Triangulation of GRB 151231A
  54. GRB 160107A: CALET Gamma-Ray Burst Monitor detection
  55. GRB 160107A: Fermi GBM observation
  56. Konus-Wind observation of GRB 160101A
  57. GRB 160104A: Fermi GBM observation
  58. LIGO/Virgo G211117: Fermi/LAT observations
  59. GRB 160101B: Fermi-LAT detection
  60. GRB 160101B: Fermi GBM detection
  61. GRB 160101A: Fermi GBM observation
  62. GRB 151231B: Fermi GBM observation
  63. GRB 151231A: Fermi GBM observation
  64. Konus-Wind observation of GRB 151227B
  65. IPN Triangulation of GRB 151227B
  66. GRB 151229A: Fermi GBM observation
  67. GRB 151228B: Fermi GBM observation
  68. LIGO/Virgo G211117: DESGW program observations with DECam
  69. LIGO/Virgo G211117: Fermi GBM Observations
  70. GRB 151228A: Fermi GBM observation
  71. GRB 151227B: Fermi GBM detection
  72. GRB 151227A: Fermi GBM detection
  73. Konus-Wind observation of GRB 151222A
  74. Fermi GBM trigger 472694170/151224997 is not a GRB
  75. IPN Triangulation of GRB 151222A (short/hard)
  76. Fermi GBM trigger 151221730 is not a GRB
  77. GRB 151222A: Fermi GBM detection
  78. Fermi GBM trigger 151221690 is not a GRB
  79. Fermi GBM trigger 472271765/151220108 is not a GRB
  80. Fermi GBM trigger 472166503/151218890 is not a GRB
  81. LIGO/Virgo G184098: Fermi-LAT search for high-energy gamma-ray counterpart
  82. GRB 151212B: CALET Gamma-Ray Burst Monitor detection
  83. GRB 151210B: Fermi GBM observation
  84. GRB 151210B: CALET Gamma-Ray Burst Monitor detection
  85. GRB 151205A: Fermi GBM detection
  86. Fermi GBM trigger 470712580/151202062 is not a GRB
  87. Fermi GBM trigger 470290196/151127174 is not a GRB
  88. Fermi GBM trigger 470375959/151128166 is not a GRB
  89. GRB 151122A: Fermi GBM detection
  90. GRB 151122A: Swift detection of a burst
  91. Konus-Wind observation of GRB 151120A
  92. GRB 151120A: Fermi GBM observation
  93. LIGO/Virgo G194575: Fermi GBM Observations
  94. GRB 151107B: CALET Gamma-Ray Burst Monitor detection
  95. LIGO/Virgo G194575: VLA follow-up
  96. GRB 151111A: Fermi GBM observation
  97. GRB 151107B: MASTER-NET OT detection inside the FERMI error box
  98. GRB 151107B: Mini-MegaTORTORA limits on simultaneous optical emission
  99. GRB 151107B
  100. GRB 151027A: the missing GeV component

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