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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"

24587 results found.

  1. GRB 220512A: Fermi GBM Final Real-time Localization
  2. GRB 220511A: Swift/BAT-GUANO arcminute localization
  3. Fermi GRB 220511A: Global MASTER-Net observations report
  4. IceCube-220509A: Upper limits from a search for additional neutrino events in IceCube
  5. GRB 220511A: BALROG localization (Fermi Trigger 673969321/ GRB 220511571)
  6. GRB 220511A: Fermi GBM Final Real-time Localization
  7. Fermi-LAT Gamma-ray Observations of IceCube-220509A
  8. Fermi trigger No 673846271: Global MASTER-Net observations report
  9. GRB 220506A: MITSuME Akeno optical upper limits
  10. IceCube-220509A - IceCube observation of a high-energy neutrino candidate track-like event
  11. IceCube Alert 220509.76: Global MASTER-Net observations report
  12. GRB 220508A: Fermi GBM Final Real-time Localization
  13. GRB 220507A: Fermi GBM Final Localization
  14. Fermi trigger No 673610950: Global MASTER-Net observations report
  15. GRB 220506A: Swift-XRT afterglow detection
  16. Swift GRB220506.51: Global MASTER-Net observations report
  17. MAXI GRB220506.27: Global MASTER-Net observations report
  18. IPN triangulation of GRB 220423A
  19. GRB 220427A: LCO Optical Observations
  20. IceCube-220501A: Upper limits from a search for additional neutrino events in IceCube
  21. GRB 220501A: Swift-BAT refined analysis
  22. Fermi-LAT Gamma-ray Observations of IceCube-220501A
  23. GRB 220427A: GRANDMA Early Optical Afterglow Detection
  24. IceCube-220501A: No Candidate Counterparts from the Zwicky Transient Facility
  25. GRB 220501A: Fermi GBM observation
  26. IceCube-220501A - IceCube observation of a high-energy neutrino candidate track-like event
  27. IceCube Alert 220501.95: Global MASTER-Net observations report
  28. GRB 220501A: Fermi GBM Final Real-time Localization
  29. GRB 220501A: Swift detection of a burst
  30. GRB 220430A: Swift-BAT refined analysis
  31. GRB 220430A: Swift-XRT refined Analysis
  32. Swift GRB 220430A: Global MASTER-Net observations report
  33. GRB 220430A: GRANDMA observations
  34. GRB 220430A: Swift detection of a burst or Swift J0630.4+0932
  35. IceCube-220425A: Upper limits from a search for additional neutrino events in IceCube
  36. IceCube-220424A: Upper limits from a search for additional neutrino events in IceCube
  37. IceCube-220421A: Upper limits from a search for additional neutrino events in IceCube
  38. GRB 220427A: Swift-BAT refined analysis
  39. GRB 220423A: Detection by VZLUSAT-2
  40. Konus-Wind detection of GRB 220427A
  41. Konus-Wind detection of GRB 220426A
  42. IPN triangulation of GRB 220426A
  43. GRB 220426C: Swift/BAT-GUANO detection outside the coded FOV (short)
  44. Fermi GRB 220426A: Global MASTER-Net observations report
  45. GRB 220426A: Fermi GBM detection
  46. GRB 220426A: Swift/BAT-GUANO detection outside the coded FOV
  47. Fermi-LAT Gamma-ray Observations of IceCube-220425A
  48. Fermi GRB 220426B: Global MASTER-Net observations report
  49. GRB 220426B: Fermi GBM Final Real-time Localization
  50. GRB 220426A: BALROG localization (Fermi Trigger 672648596/ GRB 220426285)
  51. Fermi-LAT Gamma-ray Observations of IceCube-220424A
  52. IceCube Alert 220425.11: Global MASTER-Net observations report
  53. Fermi trigger No 672492774: Global MASTER-Net observations report
  54. IceCube-220425A - IceCube observation of a high-energy neutrino candidate track-like event
  55. GRB 220423A: Swift/BAT-GUANO detection outside the coded FOV
  56. IceCube-220424A - IceCube observation of a high-energy neutrino candidate track-like event
  57. IceCube Alert 220424.05: Global MASTER-Net observations report
  58. Fermi trigger No 672374264: Global MASTER-Net observations report
  59. GRB 220421A: Fermi GBM observation
  60. Fermi-LAT Gamma-ray Observations of IceCube-220421A
  61. GRB 220421A: Swift/BAT-GUANO detection outside the coded FOV
  62. Fermi trigger No 672221879: Global MASTER-Net observations report
  63. IceCube-220421A - IceCube observation of a high-energy neutrino candidate track-like event
  64. IceCube Alert 220421.22: Global MASTER-Net observations report
  65. GRB 220418B Fermi GBM observation
  66. Fermi trigger No 672093919: Global MASTER-Net observations report
  67. GRB 220420A: Swift/BAT-GUANO detection outside the coded FOV
  68. GRB 220403C: Further Swift-XRT observations
  69. GRB 220417A: Fermi GBM detection
  70. IPN triangulation of GRB 220411A
  71. GRB 220418B: Swift/BAT-GUANO candidate arcminute localization of a short burst
  72. GRB 220417A: Swift/BAT-GUANO detection outside the coded FOV
  73. Fermi GRB 220418A: Global MASTER-Net observations report
  74. GRB 220418B: Fermi GBM Final Real-time Localization
  75. GRB 220418A: Fermi GBM Final Real-time Localization
  76. Fermi GRB 220417A: Global MASTER-Net observations report
  77. GRB 220417A: Fermi GBM Final Real-time Localization
  78. Fermi trigger No 671729344: Global MASTER-Net observations report
  79. GRB 220412B: Swift-BAT refined analysis
  80. Konus-Wind detection of GRB 220412B
  81. GRB 220412B: Fermi GBM observation
  82. Konus-Wind detection of GRB 220403C
  83. GRB 220408B: Fermi GBM observation
  84. Konus-Wind detection of GRB 220408B
  85. GRB 220412B: TNG optical observations
  86. GRB 220412A: GRANDMA observations
  87. GRB 220412A: Swift-BAT refined analysis
  88. GRB 220408B: Fermi-LAT detection
  89. IPN triangulation of short/soft GRB 220406A
  90. Swift GRB 220412B: Global MASTER-Net observations report
  91. GRB 220412A: MITSuME Akeno optical upper limits
  92. GRB 220412B: MITSuME Akeno optical upper limits
  93. GRB 220408A: GRANDMA observations
  94. GRB 220403B: GRANDMA observations
  95. GRB 220412A: Swift detection of a burst
  96. Swift GRB220412.28: Global MASTER-Net observations report
  97. IPN triangulation of GRB 220408B
  98. IPN triangulation of GRB 220403C
  99. GRB 220408A: Swift-BAT refined analysis
  100. Fermi GRB 220411A: Global MASTER-Net observations report

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