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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"

11559 results found.

  1. GRB 160316A: CALET Gamma-Ray Burst Monitor detection
  2. GRB 160310A: Terskol 2-m observations
  3. IPN Triangulation of GRB 160310A
  4. GRB 160310A: A further Swift-XRT observation, no afterglow detected
  5. GRB 160314B: Fermi GBM observation
  6. GRB 160314B: Fermi-LAT detection
  7. Fermi GBM trigger 479509107/160312874 is not a GRB
  8. Konus-Wind observation of GRB 160310A (possible ultra-long GRB?)
  9. GRB 160310A: RATIR Optical and NIR Observations
  10. GRB 160310A: Swift-XRT observations
  11. GRB 160310A: Fermi GBM observation
  12. GRB 160310A: Swift ToO observations
  13. GRB 160310A: Fermi-LAT detection
  14. GRB 160227B: Fermi GBM detection
  15. GRB 160225B: Fermi GBM detection
  16. IPN Triangulation of GRB 160225B
  17. GRB 160225.81/FERMI Trigg 478121069: MASTER OT J095503.19-355149.4 follow up observations
  18. GRB 160225.81/FERMI Trigg 478121069: MASTER OT J095503.19-355149.4 detection
  19. Fermi GBM trigger 478156376/16022621 is not a GRB
  20. GRB 160223A: AbAO optical observations
  21. Konus-Wind observation of GRB 160219A
  22. Fermi GBM trigger 477460274/160218161 is not a GRB
  23. Fermi GBM trigger 477985003/160224234 is not a GRB
  24. GRB 160223B: Khureltogot optical observations
  25. GRB 160223A: Fermi GBM observation
  26. GRB 160223B: LCOGT-FTN optical observations
  27. GRB 160223B: Fermi GBM observation
  28. GRB 160221A: Fermi GBM observation
  29. GRB 160219A: Fermi GBM detection
  30. GRB 160220A: nIR observations at AAT
  31. IPN Triangulation of GRB 160219A (short/hard)
  32. GRB 160220A: Fermi GBM observation
  33. LIGO/Virgo G184098: MASTER arhival results
  34. Konus-Wind observation of GRB 160216A (and GRB 160216B)
  35. Fermi GBM trigger 477254668/160215781 is not a GRB
  36. GRB 160206B: Fermi GBM detection
  37. GRB 160206B: iPTF P48 Observations and Optical Transient Candidates
  38. Fermi GBM trigger 475675010/160128498 is not a GRB
  39. GRB 160118A CALET Gamma-Ray Burst Monitor detection
  40. Konus-Wind observation of GRB 160113A
  41. GRB 160106A: CALET Gamma-Ray Burst Monitor detection
  42. IPN Triangulation of GRB 160113A
  43. Konus-Wind observation of GRB 151231A
  44. GRB 160113A: Swift-XRT observations
  45. GRB 160113A: Fermi GBM detection
  46. GRB 160113A: Swift ToO observations
  47. GRB 160113A: iPTF P48 Observations and Optical Transient Candidates
  48. Konus-Wind observation of GRB 160107A
  49. IPN Triangulation of GRB 151231A
  50. GRB 160107A: CALET Gamma-Ray Burst Monitor detection
  51. GRB 160107A: Fermi GBM observation
  52. Konus-Wind observation of GRB 160101A
  53. GRB 160104A: Fermi GBM observation
  54. LIGO/Virgo G211117: Fermi/LAT observations
  55. GRB 160101B: Fermi-LAT detection
  56. GRB 160101B: Fermi GBM detection
  57. GRB 160101A: Fermi GBM observation
  58. GRB 151231B: Fermi GBM observation
  59. GRB 151231A: Fermi GBM observation
  60. Konus-Wind observation of GRB 151227B
  61. IPN Triangulation of GRB 151227B
  62. GRB 151229A: Fermi GBM observation
  63. GRB 151228B: Fermi GBM observation
  64. LIGO/Virgo G211117: DESGW program observations with DECam
  65. LIGO/Virgo G211117: Fermi GBM Observations
  66. GRB 151228A: Fermi GBM observation
  67. GRB 151227B: Fermi GBM detection
  68. GRB 151227A: Fermi GBM detection
  69. Konus-Wind observation of GRB 151222A
  70. Fermi GBM trigger 472694170/151224997 is not a GRB
  71. IPN Triangulation of GRB 151222A (short/hard)
  72. Fermi GBM trigger 151221730 is not a GRB
  73. GRB 151222A: Fermi GBM detection
  74. Fermi GBM trigger 151221690 is not a GRB
  75. Fermi GBM trigger 472271765/151220108 is not a GRB
  76. Fermi GBM trigger 472166503/151218890 is not a GRB
  77. LIGO/Virgo G184098: Fermi-LAT search for high-energy gamma-ray counterpart
  78. GRB 151212B: CALET Gamma-Ray Burst Monitor detection
  79. GRB 151210B: Fermi GBM observation
  80. GRB 151210B: CALET Gamma-Ray Burst Monitor detection
  81. GRB 151205A: Fermi GBM detection
  82. Fermi GBM trigger 470712580/151202062 is not a GRB
  83. Fermi GBM trigger 470290196/151127174 is not a GRB
  84. Fermi GBM trigger 470375959/151128166 is not a GRB
  85. GRB 151122A: Fermi GBM detection
  86. GRB 151122A: Swift detection of a burst
  87. Konus-Wind observation of GRB 151120A
  88. GRB 151120A: Fermi GBM observation
  89. LIGO/Virgo G194575: Fermi GBM Observations
  90. GRB 151107B: CALET Gamma-Ray Burst Monitor detection
  91. LIGO/Virgo G194575: VLA follow-up
  92. GRB 151111A: Fermi GBM observation
  93. GRB 151107B: MASTER-NET OT detection inside the FERMI error box
  94. GRB 151107B: Mini-MegaTORTORA limits on simultaneous optical emission
  95. GRB 151107B
  96. GRB 151027A: the missing GeV component
  97. GRB 151030A: Fermi GBM observation
  98. Konus-Wind observation of GRB 151027A
  99. GRB 151027A: Fermi GBM observation
  100. GRB 151006A: CALET Gamma-Ray Burst Monitor detection

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