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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"

11552 results found.

  1. Konus-Wind observation of GRB 160310A (possible ultra-long GRB?)
  2. GRB 160310A: RATIR Optical and NIR Observations
  3. GRB 160310A: Swift-XRT observations
  4. GRB 160310A: Fermi GBM observation
  5. GRB 160310A: Swift ToO observations
  6. GRB 160310A: Fermi-LAT detection
  7. GRB 160227B: Fermi GBM detection
  8. GRB 160225B: Fermi GBM detection
  9. IPN Triangulation of GRB 160225B
  10. GRB 160225.81/FERMI Trigg 478121069: MASTER OT J095503.19-355149.4 follow up observations
  11. GRB 160225.81/FERMI Trigg 478121069: MASTER OT J095503.19-355149.4 detection
  12. Fermi GBM trigger 478156376/16022621 is not a GRB
  13. GRB 160223A: AbAO optical observations
  14. Konus-Wind observation of GRB 160219A
  15. Fermi GBM trigger 477460274/160218161 is not a GRB
  16. Fermi GBM trigger 477985003/160224234 is not a GRB
  17. GRB 160223B: Khureltogot optical observations
  18. GRB 160223A: Fermi GBM observation
  19. GRB 160223B: LCOGT-FTN optical observations
  20. GRB 160223B: Fermi GBM observation
  21. GRB 160221A: Fermi GBM observation
  22. GRB 160219A: Fermi GBM detection
  23. GRB 160220A: nIR observations at AAT
  24. IPN Triangulation of GRB 160219A (short/hard)
  25. GRB 160220A: Fermi GBM observation
  26. LIGO/Virgo G184098: MASTER arhival results
  27. Konus-Wind observation of GRB 160216A (and GRB 160216B)
  28. Fermi GBM trigger 477254668/160215781 is not a GRB
  29. GRB 160206B: Fermi GBM detection
  30. GRB 160206B: iPTF P48 Observations and Optical Transient Candidates
  31. Fermi GBM trigger 475675010/160128498 is not a GRB
  32. GRB 160118A CALET Gamma-Ray Burst Monitor detection
  33. Konus-Wind observation of GRB 160113A
  34. GRB 160106A: CALET Gamma-Ray Burst Monitor detection
  35. IPN Triangulation of GRB 160113A
  36. Konus-Wind observation of GRB 151231A
  37. GRB 160113A: Swift-XRT observations
  38. GRB 160113A: Fermi GBM detection
  39. GRB 160113A: Swift ToO observations
  40. GRB 160113A: iPTF P48 Observations and Optical Transient Candidates
  41. Konus-Wind observation of GRB 160107A
  42. IPN Triangulation of GRB 151231A
  43. GRB 160107A: CALET Gamma-Ray Burst Monitor detection
  44. GRB 160107A: Fermi GBM observation
  45. Konus-Wind observation of GRB 160101A
  46. GRB 160104A: Fermi GBM observation
  47. LIGO/Virgo G211117: Fermi/LAT observations
  48. GRB 160101B: Fermi-LAT detection
  49. GRB 160101B: Fermi GBM detection
  50. GRB 160101A: Fermi GBM observation
  51. GRB 151231B: Fermi GBM observation
  52. GRB 151231A: Fermi GBM observation
  53. Konus-Wind observation of GRB 151227B
  54. IPN Triangulation of GRB 151227B
  55. GRB 151229A: Fermi GBM observation
  56. GRB 151228B: Fermi GBM observation
  57. LIGO/Virgo G211117: DESGW program observations with DECam
  58. LIGO/Virgo G211117: Fermi GBM Observations
  59. GRB 151228A: Fermi GBM observation
  60. GRB 151227B: Fermi GBM detection
  61. GRB 151227A: Fermi GBM detection
  62. Konus-Wind observation of GRB 151222A
  63. Fermi GBM trigger 472694170/151224997 is not a GRB
  64. IPN Triangulation of GRB 151222A (short/hard)
  65. Fermi GBM trigger 151221730 is not a GRB
  66. GRB 151222A: Fermi GBM detection
  67. Fermi GBM trigger 151221690 is not a GRB
  68. Fermi GBM trigger 472271765/151220108 is not a GRB
  69. Fermi GBM trigger 472166503/151218890 is not a GRB
  70. LIGO/Virgo G184098: Fermi-LAT search for high-energy gamma-ray counterpart
  71. GRB 151212B: CALET Gamma-Ray Burst Monitor detection
  72. GRB 151210B: Fermi GBM observation
  73. GRB 151210B: CALET Gamma-Ray Burst Monitor detection
  74. GRB 151205A: Fermi GBM detection
  75. Fermi GBM trigger 470712580/151202062 is not a GRB
  76. Fermi GBM trigger 470290196/151127174 is not a GRB
  77. Fermi GBM trigger 470375959/151128166 is not a GRB
  78. GRB 151122A: Fermi GBM detection
  79. GRB 151122A: Swift detection of a burst
  80. Konus-Wind observation of GRB 151120A
  81. GRB 151120A: Fermi GBM observation
  82. LIGO/Virgo G194575: Fermi GBM Observations
  83. GRB 151107B: CALET Gamma-Ray Burst Monitor detection
  84. LIGO/Virgo G194575: VLA follow-up
  85. GRB 151111A: Fermi GBM observation
  86. GRB 151107B: MASTER-NET OT detection inside the FERMI error box
  87. GRB 151107B: Mini-MegaTORTORA limits on simultaneous optical emission
  88. GRB 151107B
  89. GRB 151027A: the missing GeV component
  90. GRB 151030A: Fermi GBM observation
  91. Konus-Wind observation of GRB 151027A
  92. GRB 151027A: Fermi GBM observation
  93. GRB 151006A: CALET Gamma-Ray Burst Monitor detection
  94. Possible Fermi-LAT Gamma-ray counterpart for LIGO/Virgo G194575
  95. LIGO/Virgo G194575: Fermi GBM Observations
  96. LIGO/Virgo G194575: Identification of a GW CBC Candidate
  97. GRB 151021B: Fermi GBM detection
  98. Fermi GBM trigger 466602792/151015495 is not a GRB
  99. Fermi GBM trigger 466316973/151012187 is not a GRB
  100. Fermi GBM trigger 466059859/151009211 is not a GRB

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