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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"

11627 results found.

  1. Konus-Wind observation of GRB 160612A
  2. IPN Triangulation of GRB 160612A (short/hard)
  3. GRB 160509A: 15 GHz upper limits from AMI
  4. GRB 160612A: Fermi GBM detection
  5. Fermi GBM trigger 486907024/160606498 is not a GRB
  6. Fermi GBM trigger 486562774/160602514 is not a GRB
  7. GRB 160530B CALET Gamma-Ray Burst Monitor detection
  8. GRB 160530B: Fermi GBM Detection
  9. GRB 160521B: Swift-XRT afterglow detection
  10. Konus-Wind observation of GRB 160521B
  11. Correction - Fermi/GBM trigger 160523919 is a GRB
  12. GRB 160521B: Theoretical estimate of the redshift and urgent need for further x-ray observations
  13. The nature of the Fermi/GBM trigger 160523919 is unknown.
  14. GRB 160521B: Swift-XRT observations
  15. GRB 160521B: Swift ToO observations
  16. GRB 160521B: Fermi-LAT detection
  17. GRB 160521B: Fermi GBM detection
  18. GRB 160519A: Fermi GBM detection
  19. Konus-Wind observation of a bright burst from SGR 1935+2154
  20. FERMI GBM bursts from the magnetar SGR 1935+2154
  21. SGR 1935+2154: AbAO optical upper limit
  22. Fermi GBM triggers of SGR 1935+2154
  23. Fermi GBM trigger 485205628 /160517806 is not a GRB
  24. Fermi GBM trigger 485124591/160516868 is not a GRB
  25. Fermi GBM trigger 484906918/160514349 is not a GRB
  26. GRB 160509A: Further VLA Observations
  27. Interplanetary Network Search for IceCube 160427A
  28. GRB 160509A: non-observation of VHE emission with HAWC
  29. GRB 160509A: TLS Tautenburg Afterglow Detection
  30. GRB 160509A Gemini North redshift
  31. Fermi GBM trigger 484574960/160510506 is not a GRB
  32. Konus-Wind observation of GRB 160509A
  33. GRB 160509A: DCT Imaging / Afterglow Confirmation
  34. GRB 160509A: VLA Detection
  35. GRB 160509A: Fermi-LAT refined analysis
  36. GRB 160509A: Fermi GBM Detection
  37. GRB 160509A Gemini North candidate afterglow
  38. GRB 160509A: Swift-XRT afterglow detection
  39. GRB 160509A: Preliminary XRT positon
  40. GRB 160509A: Tiled Swift observations
  41. GRB 160509A: Fermi-LAT prompt detection of a very bright burst
  42. GRB 160503A: Fermi GBM observation
  43. GRB 160503A: Fermi-LAT detection
  44. IceCube-160427A: Fermi GBM Observations
  45. Fermi/LAT search for counterpart to the IceCube event 67093193 (run 127853)
  46. GRB 160422A: XRT Afterglow Confirmation
  47. GRB 160422A: GROND NIR afterglow detection
  48. GRB 160422A: CALET Gamma-Ray Burst Monitor detection
  49. Konus-Wind observation of GRB 160424A
  50. GRB 160424A: Fermi GBM observation
  51. GRB 160422A: Swift-XRT afterglow detection
  52. GRB 160422A: Fermi GBM observation
  53. GRB 160422A: Swift ToO observations
  54. GRB 160422A: Fermi-LAT Detection
  55. GRB 160419A: Fermi GBM detection
  56. Fermi GBM trigger 482632364/160418023 is not a GRB
  57. GRB 160408A: CALET Gamma-Ray Burst Monitor detection
  58. GRB 160411A: Fermi GBM detection
  59. GRB 160408A: Fermi GBM detection
  60. GRB 160406A: Fermi GBM observation
  61. GRB 160408A: Swift-BAT refined analysis
  62. IPN Triangulation of GRB 160406A (short/hard)
  63. Konus-Wind observation of GRB 160325A
  64. GRB 160325A: GROND Upper Limits
  65. GRB 160325A: Fermi-LAT detection
  66. LIGO/Virgo G211117: CALET GBM Observations
  67. GRB 160325A: Fermi GBM detection
  68. Fermi Gamma-ray Burst Monitor trigger 160323546 is not a GRB
  69. GRB 160316A: CALET Gamma-Ray Burst Monitor detection
  70. GRB 160310A: Terskol 2-m observations
  71. IPN Triangulation of GRB 160310A
  72. GRB 160310A: A further Swift-XRT observation, no afterglow detected
  73. GRB 160314B: Fermi GBM observation
  74. GRB 160314B: Fermi-LAT detection
  75. Fermi GBM trigger 479509107/160312874 is not a GRB
  76. Konus-Wind observation of GRB 160310A (possible ultra-long GRB?)
  77. GRB 160310A: RATIR Optical and NIR Observations
  78. GRB 160310A: Swift-XRT observations
  79. GRB 160310A: Fermi GBM observation
  80. GRB 160310A: Swift ToO observations
  81. GRB 160310A: Fermi-LAT detection
  82. GRB 160227B: Fermi GBM detection
  83. GRB 160225B: Fermi GBM detection
  84. IPN Triangulation of GRB 160225B
  85. GRB 160225.81/FERMI Trigg 478121069: MASTER OT J095503.19-355149.4 follow up observations
  86. GRB 160225.81/FERMI Trigg 478121069: MASTER OT J095503.19-355149.4 detection
  87. Fermi GBM trigger 478156376/16022621 is not a GRB
  88. GRB 160223A: AbAO optical observations
  89. Konus-Wind observation of GRB 160219A
  90. Fermi GBM trigger 477460274/160218161 is not a GRB
  91. Fermi GBM trigger 477985003/160224234 is not a GRB
  92. GRB 160223B: Khureltogot optical observations
  93. GRB 160223A: Fermi GBM observation
  94. GRB 160223B: LCOGT-FTN optical observations
  95. GRB 160223B: Fermi GBM observation
  96. GRB 160221A: Fermi GBM observation
  97. GRB 160219A: Fermi GBM detection
  98. GRB 160220A: nIR observations at AAT
  99. IPN Triangulation of GRB 160219A (short/hard)
  100. GRB 160220A: Fermi GBM observation

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