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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"

11622 results found.

  1. GRB 221216A: Fermi GBM Final Real-time Localization
  2. IceCube-221216A - IceCube observation of a high-energy neutrino candidate track-like event
  3. Fermi trigger No 692760884: Global MASTER-Net observations report
  4. GRB 221215A: Swift/BAT-GUANO arcminute localization
  5. Konus-Wind detection of GRB 221209A
  6. Fermi GRB 221215B: Global MASTER-Net observations report
  7. IPN triangulation of GRB 221209A (long)
  8. GRB 221215B: Fermi GBM Final Real-time Localization
  9. Fermi Gamma-ray Burst Monitor trigger 692760884/221215066 is not a GRB
  10. Fermi trigger No 692713692: Global MASTER-Net observations report
  11. GRB 221215A: Fermi GBM Final Real-time Localization
  12. Fermi Gamma-ray Burst Monitor triggers 692721536/221214610 and 692713692/221214520 are not GRBs
  13. Konus-Wind detection of a burst from SGR 1935+2154 on 2022 December 13
  14. Fermi trigger No 692607435: Global MASTER-Net observations report
  15. GRB 221209A: CALET Gamma-Ray Burst Monitor detection
  16. GRB 221212A: Fermi GBM Final Real-time Localization
  17. Fermi GRB 221211A: Global MASTER-Net observations report
  18. GRB 221211A: Fermi GBM Final Real-time Localization
  19. IceCube-221210A - IceCube observation of a high-energy neutrino candidate track-like event
  20. GRB 221009A: MuSCAT3 observations
  21. GRB 221209A: AstroSat CZTI detection
  22. GRB 221210A: Fermi GBM Final Real-time Localization
  23. GRB 221209B: Fermi GBM Final Real-time Localization
  24. GRB 221209A: Fermi GBM observation
  25. GRB 221209A: BALROG localization (Fermi Trigger 692257829 / GRB 221209243)
  26. GRB 221209A: Fermi GBM Final Real-time Localization
  27. GRB 221206B: Fermi GBM observation
  28. GRB 221206B: Detection by GRBAlpha
  29. GRB 221206B: Swift/BAT-GUANO candidate arcminute localization
  30. GRB 221206C: Fermi GBM Final Real-time Localization
  31. GRB 221206B: Fermi GBM Final Real-time Localization
  32. GRB 221206A: Fermi GBM Final Real-time Localization
  33. GRB 221205A: Fermi GBM Final Real-time Localization
  34. GRB 221202B: Detection by VZLUSAT-2
  35. GRB 221203B: Fermi GBM Final Real-time Localization
  36. GRB 221203A: Fermi GBM Final Real-time Localization
  37. GRB 221201A: Fermi GBM observation
  38. GRB 221202B: Fermi GBM Final Real-time Localization
  39. GRB 221201A: Fermi GBM Final Real-time Localization
  40. Fermi Gamma-ray Burst Monitor trigger 691534074/221130867 is not a GRB
  41. GRB 221126A: Fermi GBM observation
  42. GRB 221126A: AGILE detection
  43. GRB 221127A: Detection by GRBAlpha
  44. GRB 221126A: AstroSat CZTI detection
  45. GRB 221126A: Swift/BAT-GUANO detection outside the coded FOV
  46. GRB 221126A: Fermi GBM Final Real-time Localization
  47. Fermi-LAT gamma-ray observations of IceCube-221124A
  48. GRB 221120A: Detection by VZLUSAT-2
  49. IceCube-221124A - IceCube observation of a high-energy neutrino candidate track-like event
  50. GRB 221121A: CALET Gamma-Ray Burst Monitor detection
  51. GRB 221009A：DAMPE observed a 34.7 GeV photon at 1.36 hour after the GBM trigger
  52. IPN triangulation of GRB 221121A (long)
  53. GRB221121A: AstroSat CZTI detection
  54. GRB 221120A: Fermi GBM observation
  55. GRB 221121A: Fermi GBM Final Real-time Localization
  56. GRB 221119A: Fermi GBM detection
  57. GRB 221119A: Detection by GRBAlpha
  58. GRB 221119A: Fermi-LAT detection
  59. GRB 221119A: Fermi GBM Final Real-time Localization
  60. GRB 221009A: Japanese VLBI Network observation
  61. GRB 221118A: Fermi GBM Final Real-time Localization
  62. GRB 221115A: Fermi GBM detection
  63. GRB 221115A: Swift/BAT-GUANO detection
  64. Konus-Wind detection of a burst from SGR 1935+2154 on 2022 November 9
  65. GRB 221112A: Detection by GRBAlpha
  66. GRB 221112A: Fermi GBM Final Real-time Localization
  67. GRB 221009A: GRANDMA/Kilonova-Catcher observations
  68. Fermi-GBM Observations of High Bursting Activity from SGR J1935+2154
  69. GRB 221009A: Hubble Space Telescope observations
  70. GRB 221104A: Fermi GBM Final Localization
  71. GRB 221108A: Fermi GBM Final Localization
  72. GRB 221107A: Fermi GBM Observation
  73. GRB 221107A: Detection by GRBAlpha
  74. GRB 221009A: Extended Bad Time Intervals for Fermi LAT data
  75. GRB 221107A: Swift/BAT-GUANO detection outside the coded FOV
  76. GRB 221107A: Fermi GBM Final Localization
  77. Fermi-LAT gamma-ray observations of IceCube-221104A
  78. IceCube-221104A - IceCube observation of a high-energy neutrino candidate track-like event
  79. GRB 221029A: CALET Gamma-Ray Burst Monitor detection
  80. GRB 221029A: Fermi GBM observation
  81. GRB 221029A: Fermi GBM Final Localization
  82. GRB 221029A: Swift/BAT-GUANO detection outside the coded FOV
  83. GRB 221029A: Detection by GRBAlpha
  84. GRB 221027A: AGILE detection
  85. GRB 221027A: Fermi GBM detection
  86. IPN triangulation of GRB 221025A (short)
  87. Konus-Wind detection of GRB 221022B
  88. GRB 221024A: Mondy optical observations
  89. GRB 221027A: Fermi-LAT detection
  90. GRB 221027A: Fermi GBM Final Real-time Localization
  91. GRB 221024A: GRANDMA observations
  92. Fermi Gamma-ray Burst Monitor trigger 688431261/221025954 is not a GRB
  93. IPN triangulation of GRB 221022C (short)
  94. GRB 221023A: AGILE/GRID analysis
  95. SGR 1935+2154: AstroSat CZTI Detections
  96. GRB 221025A: AstroSat CZTI detection
  97. GRB 221009A: SARA-RM 1m Optical Afterglow Detection
  98. GRB 221025A: Fermi GBM Observation
  99. GRB 221009A: spectroscopic confirmation of SN in LBT spectra
  100. Konus-Wind detection of GRB 221023A

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