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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"

24583 results found.

  1. GRB 221218A: a long GRB detected by INTEGRAL
  2. Integral GRB221218.34: Global MASTER-Net observations report
  3. Fermi-LAT gamma-ray observations of IceCube-221216A
  4. IceCube-221216A: Upper limits from a search for additional neutrino events in IceCube
  5. GRB 221216A: Fermi GBM observation
  6. GRB 221216A: Swift-XRT refined Analysis
  7. Fermi-LAT gamma-ray observations of IceCube-221210A
  8. IceCube Alert 221216.25: Global MASTER-Net observations report
  9. GRB 221216A: AKO Upper Limit
  10. Swift GRB 221216A: Global MASTER-Net observations report
  11. GRB 221216A: Fermi GBM Final Real-time Localization
  12. IceCube-221216A - IceCube observation of a high-energy neutrino candidate track-like event
  13. Fermi trigger No 692760884: Global MASTER-Net observations report
  14. GRB 221215A: Swift/BAT-GUANO arcminute localization
  15. Konus-Wind detection of GRB 221209A
  16. Fermi GRB 221215B: Global MASTER-Net observations report
  17. IPN triangulation of GRB 221209A (long)
  18. GRB 221215B: Fermi GBM Final Real-time Localization
  19. Swift GRB221215.15: Global MASTER-Net observations report
  20. Fermi trigger No 692713692: Global MASTER-Net observations report
  21. GRB 221215A: Fermi GBM Final Real-time Localization
  22. Fermi trigger No 692607435: Global MASTER-Net observations report
  23. GRB 221209A: CALET Gamma-Ray Burst Monitor detection
  24. IceCube-221210A: Upper limits from a search for additional neutrino events in IceCube
  25. GRB 221212A: Fermi GBM Final Real-time Localization
  26. Fermi GRB 221211A: Global MASTER-Net observations report
  27. GRB 221211A: Fermi GBM Final Real-time Localization
  28. IceCube-221210A - IceCube observation of a high-energy neutrino candidate track-like event
  29. IceCube Alert 221210.36: Global MASTER-Net observations report
  30. GRB 221210A: Fermi GBM Final Real-time Localization
  31. GRB 221209B: Fermi GBM Final Real-time Localization
  32. GRB 221209A: Fermi GBM observation
  33. GRB 221209A: BALROG localization (Fermi Trigger 692257829 / GRB 221209243)
  34. GRB 221209A: Fermi GBM Final Real-time Localization
  35. GRB 221206B: Fermi GBM observation
  36. GRB 221206B: Detection by GRBAlpha
  37. GRB 221206B: Swift/BAT-GUANO candidate arcminute localization
  38. GRB 221206C: Fermi GBM Final Real-time Localization
  39. GRB 221206B: Fermi GBM Final Real-time Localization
  40. GRB 221206A: Fermi GBM Final Real-time Localization
  41. GRB 221205A: Fermi GBM Final Real-time Localization
  42. Swift GRB221204.45 AKO Upper Limit
  43. GRB 221202B: Detection by VZLUSAT-2
  44. Swift GRB221204.45: Global MASTER-Net observations report
  45. GRB 221203B: Fermi GBM Final Real-time Localization
  46. GRB 221202A: Swift-BAT refined analysis
  47. GRB 221201A: Swift-BAT refined analysis
  48. GRB 221203A: Fermi GBM Final Real-time Localization
  49. GRB 221201A: Fermi GBM observation
  50. GRB 221202A: LCOGT Optical Upper Limits
  51. GRB 221202B: Fermi GBM Final Real-time Localization
  52. Swift GRB221202.84: Global MASTER-Net observations report
  53. Swift GRB 221201A: Global MASTER-Net observations report
  54. Konus-Wind detection of GRB 221124A
  55. GRB 221201A: Swift detection of a burst
  56. GRB 221201A: Fermi GBM Final Real-time Localization
  57. GRB 221126A: Fermi GBM observation
  58. IceCube-221124A: Upper limits from a search for additional neutrino events in IceCube
  59. GRB 221127A: Detection by GRBAlpha
  60. IceCube-221124A: BOOTES-4/MET and BOOTES-2/TELMA optical upper limit
  61. Alert from the HAWC Burst Monitor HAWC-221128A
  62. GRB 221126A: Swift/BAT-GUANO detection outside the coded FOV
  63. IPN triangulation of GRB 221124A (long)
  64. GRB 221126A: Fermi GBM Final Real-time Localization
  65. GRB 221124A: Swift/BAT-GUANO detection
  66. Fermi-LAT gamma-ray observations of IceCube-221124A
  67. GRB 221120A: Detection by VZLUSAT-2
  68. IceCube-221124A - IceCube observation of a high-energy neutrino candidate track-like event
  69. IceCube Alert 221124.66: Global MASTER-Net observations report
  70. GRB 221122A: Detection by GRBAlpha
  71. Alert from the HAWC Burst Monitor HAWC-221123A
  72. GRB 221121A: CALET Gamma-Ray Burst Monitor detection
  73. GRB 221009A：DAMPE observed a 34.7 GeV photon at 1.36 hour after the GBM trigger
  74. IPN triangulation of GRB 221121A (long)
  75. GRB 221120A: Swift-BAT refined analysis
  76. GRB 221120A: AKO Telescope Upper Limits
  77. GRB 221120A: Liverpool Telescope Upper Limits
  78. GRB 221120A: Fermi GBM observation
  79. GRB 221121A: Fermi GBM Final Real-time Localization
  80. GRB 221120A: LDT Optical Afterglow Candidate
  81. GRB 221119A: Fermi GBM detection
  82. GRB 221119A: Fermi-LAT detection
  83. LAT GRB221119.63: Global MASTER-Net observations report
  84. GRB 221119A: Fermi GBM Final Real-time Localization
  85. GRB 221115B: CALET Gamma-Ray Burst Monitor detection
  86. GRB 221118A: Fermi GBM Final Real-time Localization
  87. GRB 221115B: LCOGT Optical Upper Limits
  88. GRB 221115A: Fermi GBM detection
  89. GRB 221115B: Swift/BAT-GUANO arcminute localization
  90. GRB 221115A: Swift/BAT-GUANO detection
  91. GRB 221110A: GRANDMA observations
  92. GRB 221112A: Detection by GRBAlpha
  93. GRB 221112A: Fermi GBM Final Real-time Localization
  94. GRB 221009A: GRANDMA/Kilonova-Catcher observations
  95. GRB 221110A: Swift-BAT refined analysis
  96. GRB 221110A: VLT/X-shooter redshift
  97. GRB 221110A: LCOGT Optical Afterglow Detection
  98. Swift GRB221110.10: Global MASTER-Net OT detection
  99. Swift GRB221110.10: Global MASTER-Net observations report
  100. Fermi-GBM Observations of High Bursting Activity from SGR J1935+2154

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