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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"

11649 results found.

  1. GRB 240408A: Fermi GBM Final Real-time Localization
  2. GRB 240407A: BALROG localization (Fermi Trigger 734144396 / GRB 240407042)
  3. Fermi GRB 240407A: Global MASTER-Net observations report
  4. GRB 240407A: Fermi GBM Final Real-time Localization
  5. Fermi-LAT gamma-ray observations of IceCube-240327B
  6. Fermi-LAT gamma-ray observations of IceCube-240327A
  7. Fermi GRB 240405B: Global MASTER-Net observations report
  8. GRB 240405B: Fermi GBM Final Real-time Localization
  9. GRB 240405A: Fermi GBM Final Real-time Localization
  10. GRB 240331A: GRBAlpha detection
  11. GRB 240403B: Glowbug gamma-ray detection
  12. GRB 240403A: Glowbug gamma-ray detection
  13. GRB 240403A: Fermi GBM Detection
  14. Fermi GRB 240404A: Global MASTER-Net observations report
  15. GRB 240404A: Fermi GBM Final Real-time Localization
  16. GRB 240403A: BALROG localization (Fermi Trigger 733838255 / GRB 240403498)
  17. Fermi trigger No 733808041: Global MASTER-Net observations report
  18. Fermi GRB 240402A: Global MASTER-Net observations report
  19. GRB 240402A: Fermi GBM Final Real-time Localization
  20. GRB 240329A: Glowbug gamma-ray detection
  21. GRB 240331A: AstroSat CZTI detection
  22. GRB 240329A: AstroSat CZTI detection
  23. GRB 240331A: Fermi GBM Final Real-time Localization
  24. GRB 240329A: GRBAlpha detection
  25. Fermi trigger No 733366352: Global MASTER-Net observations report
  26. Fermi GRB 240329A: Global MASTER-Net observations report
  27. GRB 240329A: BALROG localization (Fermi Trigger 733441392 / GRB 240329905)
  28. GRB 240329A: Fermi GBM Final Real-time Localization
  29. Fermi GRB 240328B: Global MASTER-Net observations report
  30. Fermi GRB 240328A: Global MASTER-Net observations report
  31. GRB 240328B: Fermi GBM Final Real-time Localization
  32. GRB 240328A: Fermi GBM Final Real-time Localization
  33. IceCube-240327B - IceCube observation of a high-energy neutrino candidate track-like event
  34. IceCube-240327A - IceCube observation of a high-energy neutrino candidate track-like event
  35. Fermi trigger No 733097506: Global MASTER-Net observations report
  36. Fermi trigger No 733092476: Global MASTER-Net observations report
  37. GRB 240320A: Glowbug gamma-ray detection
  38. Fermi trigger No 732937833: Global MASTER-Net observations report
  39. GRB 240318A: Fermi GBM Observation
  40. Fermi GRB 240320A: Global MASTER-Net observations report
  41. Fermi trigger No 732657380: Global MASTER-Net observations report
  42. GRB 240318A: Swift/BAT-GUANO detection of a burst outside the coded FOV
  43. GRB 240320A: Fermi GBM Final Real-time Localization
  44. Fermi Gamma-ray Burst Monitor trigger 732299243/240316686 is not a GRB
  45. GRB 240318A: Glowbug gamma-ray detection
  46. GRB 240317B: Fermi GBM Observation
  47. Fermi GRB 240318A: Global MASTER-Net observations report
  48. GRB 240318A: Fermi GBM Final Real-time Localization
  49. GRB 240317B: Swift/BAT-GUANO arcminute localization of a burst
  50. GRB 240317A: AstroSat CZTI detection
  51. Fermi GRB 240317B: Global MASTER-Net observations report
  52. Fermi GRB 240317A: Global MASTER-Net observations report
  53. GRB 240317B: Fermi GBM Final Real-time Localization
  54. GRB 240317A: Fermi GBM Final Real-time Localization
  55. Fermi trigger No 732299243: Global MASTER-Net observations report
  56. GRID detection of GRB 240306A
  57. Changes to the Fermi-GBM Triggering Thresholds
  58. GRB 240315A: Fermi GBM Final Real-time Localization
  59. Fermi GRB 240314A: Global MASTER-Net observations report
  60. GRB 240314A: Fermi GBM Final Real-time Localization
  61. GRB 240303C: VZLUSAT-2 detection
  62. GRB 240310A: MASTER OT J200702.72-263928.7 inside 3sigma
  63. Fermi trigger No 731839490: Global MASTER-Net observations report
  64. Fermi-LAT gamma-ray observations of IceCube-240307A
  65. Fermi GRB 240310A: Global MASTER-Net observations report
  66. GRB 240310A: Fermi GBM Final Real-time Localization
  67. GRID detection of GRB 240229A (Updated Report)
  68. GRID detection of GRB 240229A
  69. GRB 240308A: Fermi GBM Final Localization
  70. Fermi trigger No 731571927: Global MASTER-Net observations report
  71. GRB 231215A: further radio observations with the VLA
  72. GRB 240306A: Fermi GBM observation
  73. IceCube-240307A - IceCube observation of a high-energy neutrino candidate track-like event
  74. GRB 240229A: Glowbug gamma-ray detection
  75. GRB 240227A (short): Glowbug gamma-ray detection
  76. GRB 240229A: GRBAlpha detection
  77. Konus-Wind detection of GRB 231118A
  78. GRB 240306A: AstroSat CZTI detection
  79. Fermi GRB 240306A: Global MASTER-Net observations report
  80. Fermi GRB 240305A: Global MASTER-Net observations report
  81. GRB 240306A: Swift/BAT-GUANO detection of a burst
  82. GRB 240305A: Fermi GBM observation
  83. Fermi-LAT gamma-ray observations of IceCube-240229A
  84. GRB 240305C: AstroSat CZTI detection of a short burst
  85. GRB 240306A: Fermi GBM Final Real-time Localization
  86. Fermi GRB 240305C: Global MASTER-Net observations report
  87. GRB 240305C: Fermi GBM Final Real-time Localization
  88. GRB 240305A: Swift/BAT-GUANO arcminute localization of a burst
  89. GRB 240305B: Fermi GBM Final Localization
  90. Fermi trigger No 731303574: Global MASTER-Net observations report
  91. Konus-Wind detection of GRB 240227A (short/hard)
  92. GRB 240303B: VZLUSAT-2 detection
  93. GRB 240229A: VZLUSAT-2 detection
  94. Improved IPN triangulation of GRB 240227A (short)
  95. IPN triangulation of GRB 240229A
  96. GRB 240305A: Fermi GBM Final Real-time Localization
  97. Konus-Wind detection of GRB 240303B
  98. IPN triangulation of GRB 240303B
  99. GRB 240303B: Fermi GBM Detection
  100. GRB 240303B: CALET Gamma-Ray Burst Monitor detection

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