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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"

11610 results found.

  1. GRB 170209A: Fermi GBM Detection
  2. Fermi Trigger 508295323: MASTER-OAFA possible OT detection
  3. GRB 170208B: Fermi GBM Detection
  4. GRB 170207A: POLAR Observation
  5. GRB 170207A: AstroSat CZTI detection
  6. Konus-Wind observation of GRB 170208A
  7. GRB 170208A: Fermi GBM Detection
  8. GRB 170207A: Fermi GBM observation
  9. IPN Triangulation of GRB 170207A (long/very bright)
  10. Konus-Wind observation of GRB 170206A
  11. GRB 170206A: POLAR observation
  12. IPN Triangulation of GRB 170206A (short/hard)
  13. GRB 170206A: Fermi-LAT detection
  14. GRB 170206A: Fermi GBM observation
  15. Fermi GBM trigger 508010837/170205755 is not a GRB
  16. Fermi GBM trigger 507959893/170205165 is not a GRB
  17. GRB 170131A: POLAR Observation
  18. GRB 170131A: Fermi GBM observation
  19. GRB 170131A detected in Swift/BAT ground processing
  20. GRB 170130A: POLAR Observation
  21. Konus-Wind observation of GRB 170127C (short/hard GRB with extended emission)
  22. GRB 170127C: Swift-XRT observations
  23. GRB 170127C: POLAR Observation
  24. GRB 170127C: AstroSat CZTI detection
  25. GRB 170124A: POLAR Observation
  26. GRB 170124A: CALET Gamma-Ray Burst Monitor detection
  27. GRB 170127B: Fermi GBM observation
  28. Konus-Wind observation of GRB 170126A
  29. GRB 170127C: Tiled Swift observations
  30. GRB 170127C (Fermi/GBM trigger 507173752): AGILE analysis
  31. GRB 170127C: Fermi-LAT detection
  32. GRB 170127C: Fermi GBM detection
  33. GRB 170126A: Fermi GBM observation
  34. LIGO/Virgo G270580: Fermi GBM Observations
  35. GRB 170115B: AGILE/SuperAGILE localisation
  36. GRB 170121B: AbAO optical observations
  37. GRB 170121B: MASTER early optical observations of the Swift possible XT
  38. GRB 170121B: AstroSat CZTI detection
  39. GRB 170121B: Swift-XRT and UVOT observations
  40. GRB 170121B: LCO FTN observations
  41. GRB 170121B: Fermi GBM detection
  42. GRB 170121B: Swift ToO observations
  43. GRB 170121B/Fermi trigger 506702667 MASTER-Amur OT detection
  44. GRB 170121A: POLAR Observation
  45. GRB 170120A: POLAR Observation
  46. LIGO/Virgo G270580: Fermi-LAT search for a high-energy gamma-ray counterpart
  47. GRB 170115B: Swift-XRT observations
  48. Konus-Wind observation of GRB 170115B
  49. IPN Triangulation of GRB 170115B
  50. GRB 170115B: AGILE detection
  51. GRB 170114B: POLAR Observation
  52. GRB 170114A: POLAR Observation
  53. GRB 170115B: Tiled Swift observations
  54. GRB 170115B: AstroSat CZTI (Veto) detection
  55. GRB 170115B: Fermi-LAT detection
  56. GRB 170115B: Fermi GBM detection
  57. GRB 170114A: Fermi GBM detection
  58. GRB 170112B: POLAR observation
  59. GRB 170113A: Fermi GBM observations
  60. GRB 161230A: POLAR Observation
  61. GRB 170109A: POLAR Observation
  62. LIGO/Virgo G268556: DESGW/DECam observations
  63. LIGO/Virgo G268556: Fermi-LAT search for high-energy gamma-ray counterpart
  64. LIGO/Virgo G268556: Fermi GBM Observations
  65. GRB 170101B: POLAR observation
  66. GRB 161228C: POLAR observation
  67. GRB 161229A: POLAR observation
  68. GRB 170101B: Astrosat CZTI detection
  69. GRB 170101B: Fermi GBM detection
  70. GRB 161228B: POLAR Observation
  71. GRB 161228A: POLAR Observation
  72. Fermi GBM trigger 504490076/161227005 is not a GRB
  73. Fermi GBM trigger 504233075/161224301 is not a GRB
  74. Fermi GBM trigger 504061556/161222046 is not a GRB
  75. Fermi GBM trigger 504043585/161221838 is not a GRB
  76. GRB 161218B: Astrosat CZTI detection
  77. Fermi GBM trigger 503982114/161221126 is not a GRB
  78. GRB 161217B: POLAR Observation
  79. Konus-Wind observation of GRB 161218B
  80. IPN Triangulation of GRB 161218B (long/very bright)
  81. GRB 161212A: POLAR Detection
  82. GRB 161218B: POLAR observation
  83. GRB 161218A: POLAR observation
  84. GRB 161218B: Fermi GBM detection
  85. GRB 161207A: POLAR observation
  86. GRB 161213A: POLAR Observation
  87. GRB 161207B: POLAR observation
  88. GRB 161205A: POLAR observation
  89. GRB 161210A: POLAR observation
  90. Fermi-LAT Gamma-ray Observations of IceCube-161210
  91. GRB 161207A: CALET Gamma-Ray Burst Monitor detection
  92. GRB 161206A: Fermi GBM detection
  93. Konus-Wind observation of GRB 161202A
  94. MASTER: Optical Blazar Flare Detection during Fermi trigger 502272781 inspection
  95. GRB 161129A: POLAR Detection
  96. GRB 161202A: Fermi-LAT detection
  97. Fermi GBM trigger 502258294/161201175 is not a GRB
  98. Fermi Gamma-ray Burst Monitor trigger 161130183 is not a GRB
  99. GRB 161129A: Fermi GBM Detection
  100. Fermi GBM trigger 501785179/161125699 is not a GRB

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