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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"

11622 results found.

  1. GRB 240329A: Fermi GBM Final Real-time Localization
  2. Fermi GRB 240328B: Global MASTER-Net observations report
  3. Fermi GRB 240328A: Global MASTER-Net observations report
  4. GRB 240328B: Fermi GBM Final Real-time Localization
  5. GRB 240328A: Fermi GBM Final Real-time Localization
  6. IceCube-240327B - IceCube observation of a high-energy neutrino candidate track-like event
  7. IceCube-240327A - IceCube observation of a high-energy neutrino candidate track-like event
  8. Fermi trigger No 733097506: Global MASTER-Net observations report
  9. Fermi trigger No 733092476: Global MASTER-Net observations report
  10. GRB 240320A: Glowbug gamma-ray detection
  11. Fermi trigger No 732937833: Global MASTER-Net observations report
  12. GRB 240318A: Fermi GBM Observation
  13. Fermi GRB 240320A: Global MASTER-Net observations report
  14. Fermi trigger No 732657380: Global MASTER-Net observations report
  15. GRB 240318A: Swift/BAT-GUANO detection of a burst outside the coded FOV
  16. GRB 240320A: Fermi GBM Final Real-time Localization
  17. Fermi Gamma-ray Burst Monitor trigger 732299243/240316686 is not a GRB
  18. GRB 240318A: Glowbug gamma-ray detection
  19. GRB 240317B: Fermi GBM Observation
  20. Fermi GRB 240318A: Global MASTER-Net observations report
  21. GRB 240318A: Fermi GBM Final Real-time Localization
  22. GRB 240317B: Swift/BAT-GUANO arcminute localization of a burst
  23. GRB 240317A: AstroSat CZTI detection
  24. Fermi GRB 240317B: Global MASTER-Net observations report
  25. Fermi GRB 240317A: Global MASTER-Net observations report
  26. GRB 240317B: Fermi GBM Final Real-time Localization
  27. GRB 240317A: Fermi GBM Final Real-time Localization
  28. Fermi trigger No 732299243: Global MASTER-Net observations report
  29. GRID detection of GRB 240306A
  30. Changes to the Fermi-GBM Triggering Thresholds
  31. GRB 240315A: Fermi GBM Final Real-time Localization
  32. Fermi GRB 240314A: Global MASTER-Net observations report
  33. GRB 240314A: Fermi GBM Final Real-time Localization
  34. GRB 240303C: VZLUSAT-2 detection
  35. GRB 240310A: MASTER OT J200702.72-263928.7 inside 3sigma
  36. Fermi trigger No 731839490: Global MASTER-Net observations report
  37. Fermi-LAT gamma-ray observations of IceCube-240307A
  38. Fermi GRB 240310A: Global MASTER-Net observations report
  39. GRB 240310A: Fermi GBM Final Real-time Localization
  40. GRID detection of GRB 240229A (Updated Report)
  41. GRID detection of GRB 240229A
  42. GRB 240308A: Fermi GBM Final Localization
  43. Fermi trigger No 731571927: Global MASTER-Net observations report
  44. GRB 231215A: further radio observations with the VLA
  45. GRB 240306A: Fermi GBM observation
  46. IceCube-240307A - IceCube observation of a high-energy neutrino candidate track-like event
  47. GRB 240229A: Glowbug gamma-ray detection
  48. GRB 240227A (short): Glowbug gamma-ray detection
  49. GRB 240229A: GRBAlpha detection
  50. Konus-Wind detection of GRB 231118A
  51. GRB 240306A: AstroSat CZTI detection
  52. Fermi GRB 240306A: Global MASTER-Net observations report
  53. Fermi GRB 240305A: Global MASTER-Net observations report
  54. GRB 240306A: Swift/BAT-GUANO detection of a burst
  55. GRB 240305A: Fermi GBM observation
  56. Fermi-LAT gamma-ray observations of IceCube-240229A
  57. GRB 240305C: AstroSat CZTI detection of a short burst
  58. GRB 240306A: Fermi GBM Final Real-time Localization
  59. Fermi GRB 240305C: Global MASTER-Net observations report
  60. GRB 240305C: Fermi GBM Final Real-time Localization
  61. GRB 240305A: Swift/BAT-GUANO arcminute localization of a burst
  62. GRB 240305B: Fermi GBM Final Localization
  63. Fermi trigger No 731303574: Global MASTER-Net observations report
  64. Konus-Wind detection of GRB 240227A (short/hard)
  65. GRB 240303B: VZLUSAT-2 detection
  66. GRB 240229A: VZLUSAT-2 detection
  67. Improved IPN triangulation of GRB 240227A (short)
  68. IPN triangulation of GRB 240229A
  69. GRB 240305A: Fermi GBM Final Real-time Localization
  70. Konus-Wind detection of GRB 240303B
  71. IPN triangulation of GRB 240303B
  72. GRB 240303B: Fermi GBM Detection
  73. GRB 240303B: CALET Gamma-Ray Burst Monitor detection
  74. Fermi trigger No 731161136: Global MASTER-Net observations report
  75. GRB 240303C: BALROG localization (Fermi Trigger 731189113 / GRB 240303837)
  76. GRB 240303B: BALROG localization (Fermi Trigger 731161136 / GRB 240303513)
  77. GRB 240303B: Fermi GBM Final Localization
  78. GRB 240229A: DDOTI Upper Limits on the Afterglow
  79. GRB 240229A: CALET Gamma-Ray Burst Monitor detection
  80. IceCube-240229A - IceCube observation of a high-energy neutrino candidate track-like event
  81. Fermi GRB 240229A: Global MASTER-Net observations report
  82. GRB 240229A: BALROG localization (Fermi Trigger 730908432 / GRB 240229588)
  83. GRB 240229A: Fermi GBM Final Real-time Localization
  84. GRB 240226A: GRBAlpha detection
  85. Fermi GRB 240227A: Global MASTER-Net observations report
  86. IPN triangulation of GRB 240227A (short)
  87. Fermi GRB 240226A: Global MASTER-Net observations report
  88. GRB 240227A: Fermi GBM Final Real-time Localization
  89. Fermi Gamma-ray Burst Monitor trigger 730618809/240226236 is not a GRB
  90. GRB 240226B: Fermi GBM Final Real-time Localization
  91. GRB 240226A: Fermi GBM Final Real-time Localization
  92. GRB 240222A: ATCA radio observations
  93. Fermi trigger No 730618809: Global MASTER-Net observations report
  94. Transient EPW20240219aa: Xinglong-2.16m optical upper limit
  95. GRB 240225A: Swift/BAT-GUANO detection of a short burst
  96. GRB 240222A: GRBAlpha detection
  97. Transient EPW20240219aa: Mondy optical observations
  98. Transient EPW20240219aa: upper limit in gamma-ray range from SPI-ACS/INTEGRAL observations
  99. Insight-HXMT/HE Sub-Threshold Detection of Transient EPW20240219aa
  100. Swift BAT Sub-Threshold Detection of EPW20240219aa

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