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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"

11649 results found.

  1. Fermi-LAT gamma-ray observations of IceCube-221229A
  2. GRB 221226A: Fermi GBM detection
  3. IPN triangulation of GRB 221226A
  4. IceCube-221229A - IceCube observation of a high-energy neutrino candidate track-like event
  5. GRB 221226A: Swift/BAT-GUANO detection outside the coded FOV
  6. GRB 221228A: Fermi GBM Final Real-time Localization
  7. GRB 221226A: AGILE detection
  8. GRB 221226B: Fermi GBM Observation
  9. GRB 221226B: VLT/X-shooter redshift and host galaxy
  10. GRB 221226B: Fermi GBM Final Real-time Localization
  11. Fermi GRB 221226A: Global MASTER-Net observations report
  12. GRB 221226A: Fermi GBM Final Real-time Localization
  13. Fermi-LAT gamma-ray observations of IceCube-221224A
  14. Fermi-LAT gamma-ray observations of IceCube-221223A
  15. Fermi GRB 221223A: Global MASTER-Net observations report
  16. IceCube-221224A - IceCube observation of a high-energy neutrino candidate track-like event
  17. GRB 221223A: Fermi GBM Final Real-time Localization
  18. IceCube-221223A - IceCube observation of a high-energy neutrino candidate track-like event
  19. GRB 221221A: AGILE detection
  20. Fermi GRB 221221A: Global MASTER-Net observations report
  21. GRB 221221A: Fermi GBM Final Real-time Localization
  22. GRB 221216A: Detection by VZLUSAT-2
  23. GRB 221215A: Fermi GBM Detection
  24. Fermi-LAT gamma-ray observations of IceCube-221216A
  25. GRB 221216A: Fermi GBM observation
  26. Fermi-LAT gamma-ray observations of IceCube-221210A
  27. GRB 221216A: AKO Upper Limit
  28. GRB 221216A: Fermi GBM Final Real-time Localization
  29. IceCube-221216A - IceCube observation of a high-energy neutrino candidate track-like event
  30. Fermi trigger No 692760884: Global MASTER-Net observations report
  31. GRB 221215A: Swift/BAT-GUANO arcminute localization
  32. Konus-Wind detection of GRB 221209A
  33. Fermi GRB 221215B: Global MASTER-Net observations report
  34. IPN triangulation of GRB 221209A (long)
  35. GRB 221215B: Fermi GBM Final Real-time Localization
  36. Fermi Gamma-ray Burst Monitor trigger 692760884/221215066 is not a GRB
  37. Fermi trigger No 692713692: Global MASTER-Net observations report
  38. GRB 221215A: Fermi GBM Final Real-time Localization
  39. Fermi Gamma-ray Burst Monitor triggers 692721536/221214610 and 692713692/221214520 are not GRBs
  40. Konus-Wind detection of a burst from SGR 1935+2154 on 2022 December 13
  41. Fermi trigger No 692607435: Global MASTER-Net observations report
  42. GRB 221209A: CALET Gamma-Ray Burst Monitor detection
  43. GRB 221212A: Fermi GBM Final Real-time Localization
  44. Fermi GRB 221211A: Global MASTER-Net observations report
  45. GRB 221211A: Fermi GBM Final Real-time Localization
  46. IceCube-221210A - IceCube observation of a high-energy neutrino candidate track-like event
  47. GRB 221009A: MuSCAT3 observations
  48. GRB 221209A: AstroSat CZTI detection
  49. GRB 221210A: Fermi GBM Final Real-time Localization
  50. GRB 221209B: Fermi GBM Final Real-time Localization
  51. GRB 221209A: Fermi GBM observation
  52. GRB 221209A: BALROG localization (Fermi Trigger 692257829 / GRB 221209243)
  53. GRB 221209A: Fermi GBM Final Real-time Localization
  54. GRB 221206B: Fermi GBM observation
  55. GRB 221206B: Detection by GRBAlpha
  56. GRB 221206B: Swift/BAT-GUANO candidate arcminute localization
  57. GRB 221206C: Fermi GBM Final Real-time Localization
  58. GRB 221206B: Fermi GBM Final Real-time Localization
  59. GRB 221206A: Fermi GBM Final Real-time Localization
  60. GRB 221205A: Fermi GBM Final Real-time Localization
  61. GRB 221202B: Detection by VZLUSAT-2
  62. GRB 221203B: Fermi GBM Final Real-time Localization
  63. GRB 221203A: Fermi GBM Final Real-time Localization
  64. GRB 221201A: Fermi GBM observation
  65. GRB 221202B: Fermi GBM Final Real-time Localization
  66. GRB 221201A: Fermi GBM Final Real-time Localization
  67. Fermi Gamma-ray Burst Monitor trigger 691534074/221130867 is not a GRB
  68. GRB 221126A: Fermi GBM observation
  69. GRB 221126A: AGILE detection
  70. GRB 221127A: Detection by GRBAlpha
  71. GRB 221126A: AstroSat CZTI detection
  72. GRB 221126A: Swift/BAT-GUANO detection outside the coded FOV
  73. GRB 221126A: Fermi GBM Final Real-time Localization
  74. Fermi-LAT gamma-ray observations of IceCube-221124A
  75. GRB 221120A: Detection by VZLUSAT-2
  76. IceCube-221124A - IceCube observation of a high-energy neutrino candidate track-like event
  77. GRB 221121A: CALET Gamma-Ray Burst Monitor detection
  78. GRB 221009A：DAMPE observed a 34.7 GeV photon at 1.36 hour after the GBM trigger
  79. IPN triangulation of GRB 221121A (long)
  80. GRB221121A: AstroSat CZTI detection
  81. GRB 221120A: Fermi GBM observation
  82. GRB 221121A: Fermi GBM Final Real-time Localization
  83. GRB 221119A: Fermi GBM detection
  84. GRB 221119A: Detection by GRBAlpha
  85. GRB 221119A: Fermi-LAT detection
  86. GRB 221119A: Fermi GBM Final Real-time Localization
  87. GRB 221009A: Japanese VLBI Network observation
  88. GRB 221118A: Fermi GBM Final Real-time Localization
  89. GRB 221115A: Fermi GBM detection
  90. GRB 221115A: Swift/BAT-GUANO detection
  91. Konus-Wind detection of a burst from SGR 1935+2154 on 2022 November 9
  92. GRB 221112A: Detection by GRBAlpha
  93. GRB 221112A: Fermi GBM Final Real-time Localization
  94. GRB 221009A: GRANDMA/Kilonova-Catcher observations
  95. Fermi-GBM Observations of High Bursting Activity from SGR J1935+2154
  96. GRB 221009A: Hubble Space Telescope observations
  97. GRB 221104A: Fermi GBM Final Localization
  98. GRB 221108A: Fermi GBM Final Localization
  99. GRB 221107A: Fermi GBM Observation
  100. GRB 221107A: Detection by GRBAlpha

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