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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"

11552 results found.

  1. GRB 220228A: Fermi GBM Final Localization
  2. Konus-Wind detection of GRB 220222A
  3. Fermi trigger No 667737010: Global MASTER-Net observations report
  4. Fermi-LAT Gamma-ray Observations of IceCube-220225A
  5. IceCube-220225A - IceCube observation of a high-energy neutrino candidate track-like event
  6. IPN triangulation of GRB 220222A
  7. GCN Circ.draft on GRB 220222A
  8. Fermi GRB 220223A: Global MASTER-Net observations report
  9. GRB 220223A: Fermi GBM Final Real-time Localization
  10. Fermi GRB 220222B: Global MASTER-Net observations report
  11. GRB 220222B: Fermi GBM Final Real-time Localization
  12. GRB 220222A: Swift/BAT-GUANO detection outside the coded FOV
  13. Fermi-LAT Gamma-ray Observations of IceCube-220221A
  14. Fermi GRB 220222A: Global MASTER-Net observations report
  15. GRB 220222A: Fermi GBM Final Real-time Localization
  16. IPN triangulation of GRB 220219B (consistent with ZTF22aabjpxh/AT2022cva)
  17. Konus-Wind observation of GRB 220219A
  18. IPN triangulation of GRB 220219A
  19. IceCube-220221A - IceCube observation of a high-energy neutrino candidate track-like event
  20. Fermi Gamma-ray Burst Monitor trigger 667074291/220220767 is not a GRB
  21. Fermi trigger No 666962499: Global MASTER-Net observations report
  22. GRB 220219A: AGILE/MCAL detection
  23. GRB 220219A: BALROG localization (Fermi Trigger / GRB 220219473)
  24. GRB 220219A: Fermi GBM Final Real-time Localization
  25. GRB 220211A: redshift lower limit estimating
  26. Konus-Wind detection of GRB 220209A
  27. GRB 220211A: MASTER optical observations of ZTF22aaajecp/AT2022cmc
  28. Konus-Wind detection of GRB 220211A
  29. IPN triangulation of GRB 220209A
  30. GRB 211023A: evidence of supernova in LBT spectra
  31. GRB 220211A: Fermi GBM observation
  32. ZTF22aaajecp/AT2022cmc: Zwicky Transient Facility discovery of a fast and red optical transient
  33. Fermi trigger No 666489765: Global MASTER-Net observations report
  34. GRB 220214A: Fermi GBM Final Real-time Localization
  35. Fermi GBM trigger 666393834/220212892 is not a GRB
  36. GRB 220210A: Mondy, AbAO and Terskol optical upper limits
  37. IPN triangulation of GRB 220211A (short)
  38. GRB 220210A: Insight-HXMT/HE detection
  39. GRB 220211A: Swift/BAT-GUANO detection outside the coded FOV (short)
  40. GRB 220210A: 1.5m OSN optical upper limit
  41. GRB 220210A: Fermi GBM detection
  42. Fermi GRB 220211B: Global MASTER-Net observations report
  43. GRB 220211B: Fermi GBM Final Real-time Localization
  44. GRB 220209A: Fermi-LAT detection
  45. GRB 220210A: Fermi-LAT detection
  46. GRB 220210A: AGILE detection
  47. GRB 220210A: BOOTES-5/JGT optical afterglow candidate
  48. GRB 220210A: Swift/BAT-GUANO localization
  49. Fermi GRB 220211A: Global MASTER-Net observations report
  50. GRB 220211A: Fermi GBM Final Real-time Localization
  51. Fermi GRB 220210A: Global MASTER-Net observations report
  52. GRB 220210A: Fermi GBM Final Real-time Localization
  53. GRB 220209A: Fermi GBM Detection
  54. GRB 220209A: GECAM detection
  55. GRB 220209A: AGILE/MCAL detection
  56. Fermi GRB 220209A: Global MASTER-Net observations report
  57. GRB 220209A: Fermi GBM Final Real-time Localization
  58. Fermi-LAT Gamma-ray Observations of IceCube-220205B
  59. Fermi-LAT Gamma-ray Observations of IceCube-220205A
  60. Konus-Wind detection of GRB 220130A
  61. IceCube-220205B - IceCube observation of a high-energy neutrino candidate track-like event
  62. IceCube-220205A - IceCube observation of a high-energy neutrino candidate track-like event
  63. IPN triangulation of GRB 220130A
  64. Fermi-LAT Gamma-ray Observations of IceCube-220202A
  65. IceCube-220202A: IceCube observation of a high-energy neutrino candidate track-like event
  66. GRB 220201A: Fermi GBM Final Localization
  67. GRB 220130A: Fermi GBM Observation
  68. Fermi GRB 220131A: Global MASTER-Net observations report
  69. GRB 220131A: Fermi GBM Final Real-time Localization
  70. Fermi GRB 220129A: Global MASTER-Net observations report
  71. GRB 220129A: Fermi GBM Final Real-time Localization
  72. GRB 220124A: GECAM detection
  73. Fermi trigger No 664738369: Global MASTER-Net observations report
  74. GRB 220117A: Terskol and AbAO optical upper limits
  75. Fermi-LAT-ANTARES 220121a: upper limits from a search for coincident neutrinos with IceCube
  76. Fermi-LAT-ANTARES 220121a Coincidence
  77. GRB 220117A: Konus-Wind detection and joint Konus-Wind + Swift-BAT spectral analysis
  78. GRB 220120A: Fermi GBM Final Localization
  79. GRB 220117C: Fermi GBM Observation
  80. GRB 220118A: 2.2m CAHA/CAFOS detections
  81. GRB 220118A: Fermi GBM detection
  82. GRB 220118A: COATLI Optical Observations
  83. GRB 220117C: Swift/BAT-GUANO arcminute localization
  84. GRB 220118A: GIT optical observations
  85. GRB 220118A: MITSuME Akeno optical observation
  86. GRB 220118A: Fermi GBM Final Real-time Localization
  87. Fermi GBM Sub-Threshold Detection of GRB 220117A
  88. Fermi-LAT Gamma-ray Observations of IceCube-220115A and detection of a new gamma-ray source, Fermi J2350.2+2620
  89. GRB 220101A: TSHAO optical observation, Terskol, AbAO upper limits
  90. Fermi trigger No 663960124: Global MASTER-Net observations report
  91. Fermi trigger No 663967527: Global MASTER-Net observations report
  92. Fermi trigger No 663923149: Global MASTER-Net observations report
  93. Fermi trigger No 663899819: Global MASTER-Net observations report
  94. Fermi trigger No 663886592: Global MASTER-Net observations report
  95. Fermi trigger No 663966693: Global MASTER-Net observations report
  96. GRB 220115B: Fermi GBM Final Real-time Localization
  97. Fermi trigger No 663927396: Global MASTER-Net observations report
  98. Fermi trigger No 663921434: Global MASTER-Net observations report
  99. GRB 220115A: Fermi GBM Final Real-time Localization
  100. IceCube-220115A - IceCube observation of a high-energy neutrino candidate track-like event

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