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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"

11620 results found.

  1. GRB 170214A: Fermi-LAT detection
  2. GRB 170214A: Fermi GBM detection
  3. GRB 170209A: AstroSat CZTI detection
  4. Konus-Wind observation of GRB 170210A
  5. GRB 170210A: POLAR observation
  6. GRB 170208C: POLAR Observation
  7. IPN Triangulation of GRB 170210A
  8. GRB 170210A: Fermi GBM observation
  9. Konus-Wind observation of GRB 170209A
  10. IPN Triangulation of GRB 170209A
  11. GRB 170209A: Fermi GBM Detection
  12. Fermi Trigger 508295323: MASTER-OAFA possible OT detection
  13. GRB 170208B: Fermi GBM Detection
  14. GRB 170207A: POLAR Observation
  15. GRB 170207A: AstroSat CZTI detection
  16. Konus-Wind observation of GRB 170208A
  17. GRB 170208A: Fermi GBM Detection
  18. GRB 170207A: Fermi GBM observation
  19. IPN Triangulation of GRB 170207A (long/very bright)
  20. Konus-Wind observation of GRB 170206A
  21. GRB 170206A: POLAR observation
  22. IPN Triangulation of GRB 170206A (short/hard)
  23. GRB 170206A: Fermi-LAT detection
  24. GRB 170206A: Fermi GBM observation
  25. Fermi GBM trigger 508010837/170205755 is not a GRB
  26. Fermi GBM trigger 507959893/170205165 is not a GRB
  27. GRB 170131A: POLAR Observation
  28. GRB 170131A: Fermi GBM observation
  29. GRB 170131A detected in Swift/BAT ground processing
  30. GRB 170130A: POLAR Observation
  31. Konus-Wind observation of GRB 170127C (short/hard GRB with extended emission)
  32. GRB 170127C: Swift-XRT observations
  33. GRB 170127C: POLAR Observation
  34. GRB 170127C: AstroSat CZTI detection
  35. GRB 170124A: POLAR Observation
  36. GRB 170124A: CALET Gamma-Ray Burst Monitor detection
  37. GRB 170127B: Fermi GBM observation
  38. Konus-Wind observation of GRB 170126A
  39. GRB 170127C: Tiled Swift observations
  40. GRB 170127C (Fermi/GBM trigger 507173752): AGILE analysis
  41. GRB 170127C: Fermi-LAT detection
  42. GRB 170127C: Fermi GBM detection
  43. GRB 170126A: Fermi GBM observation
  44. LIGO/Virgo G270580: Fermi GBM Observations
  45. GRB 170115B: AGILE/SuperAGILE localisation
  46. GRB 170121B: AbAO optical observations
  47. GRB 170121B: MASTER early optical observations of the Swift possible XT
  48. GRB 170121B: AstroSat CZTI detection
  49. GRB 170121B: Swift-XRT and UVOT observations
  50. GRB 170121B: LCO FTN observations
  51. GRB 170121B: Fermi GBM detection
  52. GRB 170121B: Swift ToO observations
  53. GRB 170121B/Fermi trigger 506702667 MASTER-Amur OT detection
  54. GRB 170121A: POLAR Observation
  55. GRB 170120A: POLAR Observation
  56. LIGO/Virgo G270580: Fermi-LAT search for a high-energy gamma-ray counterpart
  57. GRB 170115B: Swift-XRT observations
  58. Konus-Wind observation of GRB 170115B
  59. IPN Triangulation of GRB 170115B
  60. GRB 170115B: AGILE detection
  61. GRB 170114B: POLAR Observation
  62. GRB 170114A: POLAR Observation
  63. GRB 170115B: Tiled Swift observations
  64. GRB 170115B: AstroSat CZTI (Veto) detection
  65. GRB 170115B: Fermi-LAT detection
  66. GRB 170115B: Fermi GBM detection
  67. GRB 170114A: Fermi GBM detection
  68. GRB 170112B: POLAR observation
  69. GRB 170113A: Fermi GBM observations
  70. GRB 161230A: POLAR Observation
  71. GRB 170109A: POLAR Observation
  72. LIGO/Virgo G268556: DESGW/DECam observations
  73. LIGO/Virgo G268556: Fermi-LAT search for high-energy gamma-ray counterpart
  74. LIGO/Virgo G268556: Fermi GBM Observations
  75. GRB 170101B: POLAR observation
  76. GRB 161228C: POLAR observation
  77. GRB 161229A: POLAR observation
  78. GRB 170101B: Astrosat CZTI detection
  79. GRB 170101B: Fermi GBM detection
  80. GRB 161228B: POLAR Observation
  81. GRB 161228A: POLAR Observation
  82. Fermi GBM trigger 504490076/161227005 is not a GRB
  83. Fermi GBM trigger 504233075/161224301 is not a GRB
  84. Fermi GBM trigger 504061556/161222046 is not a GRB
  85. Fermi GBM trigger 504043585/161221838 is not a GRB
  86. GRB 161218B: Astrosat CZTI detection
  87. Fermi GBM trigger 503982114/161221126 is not a GRB
  88. GRB 161217B: POLAR Observation
  89. Konus-Wind observation of GRB 161218B
  90. IPN Triangulation of GRB 161218B (long/very bright)
  91. GRB 161212A: POLAR Detection
  92. GRB 161218B: POLAR observation
  93. GRB 161218A: POLAR observation
  94. GRB 161218B: Fermi GBM detection
  95. GRB 161207A: POLAR observation
  96. GRB 161213A: POLAR Observation
  97. GRB 161207B: POLAR observation
  98. GRB 161205A: POLAR observation
  99. GRB 161210A: POLAR observation
  100. Fermi-LAT Gamma-ray Observations of IceCube-161210

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