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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"

11631 results found.

  1. IPN Triangulation of GRB 170219A (short/hard)
  2. LIGO/VIRGO G274296: Fermi GBM Observations
  3. GRB 170214A: Swift-XRT afterglow detection
  4. GRB170214A: RATIR Optical and NIR Afterglow Confirmation
  5. GRB 170214A: GROND detection in all bands
  6. GRB 170214A: NOT optical afterglow confirmation
  7. GRB170214A: RATIR Optical and NIR Observations
  8. GRB 170209A: GROND confirmation of MASTER afterglow
  9. GRB 170214A: Swift-XRT observations
  10. Konus-Wind observation of GRB 170214A
  11. GRB 170214A: Swift ToO observations
  12. GRB 170214A: Fermi-LAT detection
  13. GRB 170214A: Fermi GBM detection
  14. GRB 170209A: AstroSat CZTI detection
  15. Konus-Wind observation of GRB 170210A
  16. GRB 170210A: POLAR observation
  17. GRB 170208C: POLAR Observation
  18. IPN Triangulation of GRB 170210A
  19. GRB 170210A: Fermi GBM observation
  20. Konus-Wind observation of GRB 170209A
  21. IPN Triangulation of GRB 170209A
  22. GRB 170209A: Fermi GBM Detection
  23. Fermi Trigger 508295323: MASTER-OAFA possible OT detection
  24. GRB 170208B: Fermi GBM Detection
  25. GRB 170207A: POLAR Observation
  26. GRB 170207A: AstroSat CZTI detection
  27. Konus-Wind observation of GRB 170208A
  28. GRB 170208A: Fermi GBM Detection
  29. GRB 170207A: Fermi GBM observation
  30. IPN Triangulation of GRB 170207A (long/very bright)
  31. Konus-Wind observation of GRB 170206A
  32. GRB 170206A: POLAR observation
  33. IPN Triangulation of GRB 170206A (short/hard)
  34. GRB 170206A: Fermi-LAT detection
  35. GRB 170206A: Fermi GBM observation
  36. Fermi GBM trigger 508010837/170205755 is not a GRB
  37. Fermi GBM trigger 507959893/170205165 is not a GRB
  38. GRB 170131A: POLAR Observation
  39. GRB 170131A: Fermi GBM observation
  40. GRB 170131A detected in Swift/BAT ground processing
  41. GRB 170130A: POLAR Observation
  42. Konus-Wind observation of GRB 170127C (short/hard GRB with extended emission)
  43. GRB 170127C: Swift-XRT observations
  44. GRB 170127C: POLAR Observation
  45. GRB 170127C: AstroSat CZTI detection
  46. GRB 170124A: POLAR Observation
  47. GRB 170124A: CALET Gamma-Ray Burst Monitor detection
  48. GRB 170127B: Fermi GBM observation
  49. Konus-Wind observation of GRB 170126A
  50. GRB 170127C: Tiled Swift observations
  51. GRB 170127C (Fermi/GBM trigger 507173752): AGILE analysis
  52. GRB 170127C: Fermi-LAT detection
  53. GRB 170127C: Fermi GBM detection
  54. GRB 170126A: Fermi GBM observation
  55. LIGO/Virgo G270580: Fermi GBM Observations
  56. GRB 170115B: AGILE/SuperAGILE localisation
  57. GRB 170121B: AbAO optical observations
  58. GRB 170121B: MASTER early optical observations of the Swift possible XT
  59. GRB 170121B: AstroSat CZTI detection
  60. GRB 170121B: Swift-XRT and UVOT observations
  61. GRB 170121B: LCO FTN observations
  62. GRB 170121B: Fermi GBM detection
  63. GRB 170121B: Swift ToO observations
  64. GRB 170121B/Fermi trigger 506702667 MASTER-Amur OT detection
  65. GRB 170121A: POLAR Observation
  66. GRB 170120A: POLAR Observation
  67. LIGO/Virgo G270580: Fermi-LAT search for a high-energy gamma-ray counterpart
  68. GRB 170115B: Swift-XRT observations
  69. Konus-Wind observation of GRB 170115B
  70. IPN Triangulation of GRB 170115B
  71. GRB 170115B: AGILE detection
  72. GRB 170114B: POLAR Observation
  73. GRB 170114A: POLAR Observation
  74. GRB 170115B: Tiled Swift observations
  75. GRB 170115B: AstroSat CZTI (Veto) detection
  76. GRB 170115B: Fermi-LAT detection
  77. GRB 170115B: Fermi GBM detection
  78. GRB 170114A: Fermi GBM detection
  79. GRB 170112B: POLAR observation
  80. GRB 170113A: Fermi GBM observations
  81. GRB 161230A: POLAR Observation
  82. GRB 170109A: POLAR Observation
  83. LIGO/Virgo G268556: DESGW/DECam observations
  84. LIGO/Virgo G268556: Fermi-LAT search for high-energy gamma-ray counterpart
  85. LIGO/Virgo G268556: Fermi GBM Observations
  86. GRB 170101B: POLAR observation
  87. GRB 161228C: POLAR observation
  88. GRB 161229A: POLAR observation
  89. GRB 170101B: Astrosat CZTI detection
  90. GRB 170101B: Fermi GBM detection
  91. GRB 161228B: POLAR Observation
  92. GRB 161228A: POLAR Observation
  93. Fermi GBM trigger 504490076/161227005 is not a GRB
  94. Fermi GBM trigger 504233075/161224301 is not a GRB
  95. Fermi GBM trigger 504061556/161222046 is not a GRB
  96. Fermi GBM trigger 504043585/161221838 is not a GRB
  97. GRB 161218B: Astrosat CZTI detection
  98. Fermi GBM trigger 503982114/161221126 is not a GRB
  99. GRB 161217B: POLAR Observation
  100. Konus-Wind observation of GRB 161218B

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