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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"

24582 results found.

  1. Integral GRB221218.34: Global MASTER-Net observations report
  2. Fermi-LAT gamma-ray observations of IceCube-221216A
  3. IceCube-221216A: Upper limits from a search for additional neutrino events in IceCube
  4. GRB 221216A: Fermi GBM observation
  5. GRB 221216A: Swift-XRT refined Analysis
  6. Fermi-LAT gamma-ray observations of IceCube-221210A
  7. IceCube Alert 221216.25: Global MASTER-Net observations report
  8. GRB 221216A: AKO Upper Limit
  9. Swift GRB 221216A: Global MASTER-Net observations report
  10. GRB 221216A: Fermi GBM Final Real-time Localization
  11. IceCube-221216A - IceCube observation of a high-energy neutrino candidate track-like event
  12. Fermi trigger No 692760884: Global MASTER-Net observations report
  13. GRB 221215A: Swift/BAT-GUANO arcminute localization
  14. Konus-Wind detection of GRB 221209A
  15. Fermi GRB 221215B: Global MASTER-Net observations report
  16. IPN triangulation of GRB 221209A (long)
  17. GRB 221215B: Fermi GBM Final Real-time Localization
  18. Swift GRB221215.15: Global MASTER-Net observations report
  19. Fermi trigger No 692713692: Global MASTER-Net observations report
  20. GRB 221215A: Fermi GBM Final Real-time Localization
  21. Fermi trigger No 692607435: Global MASTER-Net observations report
  22. GRB 221209A: CALET Gamma-Ray Burst Monitor detection
  23. IceCube-221210A: Upper limits from a search for additional neutrino events in IceCube
  24. GRB 221212A: Fermi GBM Final Real-time Localization
  25. Fermi GRB 221211A: Global MASTER-Net observations report
  26. GRB 221211A: Fermi GBM Final Real-time Localization
  27. IceCube-221210A - IceCube observation of a high-energy neutrino candidate track-like event
  28. IceCube Alert 221210.36: Global MASTER-Net observations report
  29. GRB 221210A: Fermi GBM Final Real-time Localization
  30. GRB 221209B: Fermi GBM Final Real-time Localization
  31. GRB 221209A: Fermi GBM observation
  32. GRB 221209A: BALROG localization (Fermi Trigger 692257829 / GRB 221209243)
  33. GRB 221209A: Fermi GBM Final Real-time Localization
  34. GRB 221206B: Fermi GBM observation
  35. GRB 221206B: Detection by GRBAlpha
  36. GRB 221206B: Swift/BAT-GUANO candidate arcminute localization
  37. GRB 221206C: Fermi GBM Final Real-time Localization
  38. GRB 221206B: Fermi GBM Final Real-time Localization
  39. GRB 221206A: Fermi GBM Final Real-time Localization
  40. GRB 221205A: Fermi GBM Final Real-time Localization
  41. Swift GRB221204.45 AKO Upper Limit
  42. GRB 221202B: Detection by VZLUSAT-2
  43. Swift GRB221204.45: Global MASTER-Net observations report
  44. GRB 221203B: Fermi GBM Final Real-time Localization
  45. GRB 221202A: Swift-BAT refined analysis
  46. GRB 221201A: Swift-BAT refined analysis
  47. GRB 221203A: Fermi GBM Final Real-time Localization
  48. GRB 221201A: Fermi GBM observation
  49. GRB 221202A: LCOGT Optical Upper Limits
  50. GRB 221202B: Fermi GBM Final Real-time Localization
  51. Swift GRB221202.84: Global MASTER-Net observations report
  52. Swift GRB 221201A: Global MASTER-Net observations report
  53. Konus-Wind detection of GRB 221124A
  54. GRB 221201A: Swift detection of a burst
  55. GRB 221201A: Fermi GBM Final Real-time Localization
  56. GRB 221126A: Fermi GBM observation
  57. IceCube-221124A: Upper limits from a search for additional neutrino events in IceCube
  58. GRB 221127A: Detection by GRBAlpha
  59. IceCube-221124A: BOOTES-4/MET and BOOTES-2/TELMA optical upper limit
  60. Alert from the HAWC Burst Monitor HAWC-221128A
  61. GRB 221126A: Swift/BAT-GUANO detection outside the coded FOV
  62. IPN triangulation of GRB 221124A (long)
  63. GRB 221126A: Fermi GBM Final Real-time Localization
  64. GRB 221124A: Swift/BAT-GUANO detection
  65. Fermi-LAT gamma-ray observations of IceCube-221124A
  66. GRB 221120A: Detection by VZLUSAT-2
  67. IceCube-221124A - IceCube observation of a high-energy neutrino candidate track-like event
  68. IceCube Alert 221124.66: Global MASTER-Net observations report
  69. GRB 221122A: Detection by GRBAlpha
  70. Alert from the HAWC Burst Monitor HAWC-221123A
  71. GRB 221121A: CALET Gamma-Ray Burst Monitor detection
  72. GRB 221009A：DAMPE observed a 34.7 GeV photon at 1.36 hour after the GBM trigger
  73. IPN triangulation of GRB 221121A (long)
  74. GRB 221120A: Swift-BAT refined analysis
  75. GRB 221120A: AKO Telescope Upper Limits
  76. GRB 221120A: Liverpool Telescope Upper Limits
  77. GRB 221120A: Fermi GBM observation
  78. GRB 221121A: Fermi GBM Final Real-time Localization
  79. GRB 221120A: LDT Optical Afterglow Candidate
  80. GRB 221119A: Fermi GBM detection
  81. GRB 221119A: Fermi-LAT detection
  82. LAT GRB221119.63: Global MASTER-Net observations report
  83. GRB 221119A: Fermi GBM Final Real-time Localization
  84. GRB 221115B: CALET Gamma-Ray Burst Monitor detection
  85. GRB 221118A: Fermi GBM Final Real-time Localization
  86. GRB 221115B: LCOGT Optical Upper Limits
  87. GRB 221115A: Fermi GBM detection
  88. GRB 221115B: Swift/BAT-GUANO arcminute localization
  89. GRB 221115A: Swift/BAT-GUANO detection
  90. GRB 221110A: GRANDMA observations
  91. GRB 221112A: Detection by GRBAlpha
  92. GRB 221112A: Fermi GBM Final Real-time Localization
  93. GRB 221009A: GRANDMA/Kilonova-Catcher observations
  94. GRB 221110A: Swift-BAT refined analysis
  95. GRB 221110A: VLT/X-shooter redshift
  96. GRB 221110A: LCOGT Optical Afterglow Detection
  97. Swift GRB221110.10: Global MASTER-Net OT detection
  98. Swift GRB221110.10: Global MASTER-Net observations report
  99. Fermi-GBM Observations of High Bursting Activity from SGR J1935+2154
  100. GRB 221104A: Fermi GBM Final Localization

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