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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"

24589 results found.

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

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