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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"

37769 results found.

  1. Fermi GRB 240402A: Global MASTER-Net observations report
  2. GRB 240402A: Fermi GBM Final Real-time Localization
  3. IBAS Alert n.10651 not a GRB
  4. GRB 240329A: Glowbug gamma-ray detection
  5. GRB 240324A: AstroSat CZTI detection of a short burst
  6. GRB 240331A: AstroSat CZTI detection
  7. GRB 240329A: AstroSat CZTI detection
  8. GRB 240331A: Fermi GBM Final Real-time Localization
  9. GRB 240329A: GRBAlpha detection
  10. Fermi trigger No 733366352: Global MASTER-Net observations report
  11. Fermi GRB 240329A: Global MASTER-Net observations report
  12. GRB 240329A: BALROG localization (Fermi Trigger 733441392 / GRB 240329905)
  13. GRB 240329A: Fermi GBM Final Real-time Localization
  14. Fermi GRB 240328B: Global MASTER-Net observations report
  15. Fermi GRB 240328A: Global MASTER-Net observations report
  16. GRB 240328C: Glowbug gamma-ray detection
  17. GRB 240328B: Fermi GBM Final Real-time Localization
  18. GRB 240328A: Fermi GBM Final Real-time Localization
  19. IceCube-240327B - IceCube observation of a high-energy neutrino candidate track-like event
  20. IceCube-240327A - IceCube observation of a high-energy neutrino candidate track-like event
  21. X-ray transient EP 240315a: Second epoch Chandra observations
  22. Fermi trigger No 733097506: Global MASTER-Net observations report
  23. Fermi trigger No 733092476: Global MASTER-Net observations report
  24. GRB 240320A: Glowbug gamma-ray detection
  25. Fermi trigger No 732937833: Global MASTER-Net observations report
  26. GRB 240318A: Fermi GBM Observation
  27. Fermi GRB 240320A: Global MASTER-Net observations report
  28. Konus-Wind detection of GRB 240315C (possible counterpart of EP240315a)
  29. GRB 240315C / X-ray transient EP240315a: Swift/BAT detection
  30. Fermi trigger No 732657380: Global MASTER-Net observations report
  31. GRB 240318A: Swift/BAT-GUANO detection of a burst outside the coded FOV
  32. GRB 240320A: Fermi GBM Final Real-time Localization
  33. IPN triangulation of GRB 240315C (consistent with a fast X-ray transient EP240315a)
  34. GRB 240317B: Swift/BAT-GUANO Angular Error Correction
  35. Fermi Gamma-ray Burst Monitor trigger 732299243/240316686 is not a GRB
  36. GRB 240318A: Glowbug gamma-ray detection
  37. GRB 240317C: Glowbug gamma-ray detection
  38. GRB 240318B: Glowbug gamma-ray detection
  39. GRB 240317B: Fermi GBM Observation
  40. X-ray transient EP240315a/AT2024eju: TShAO (Zeiss-1000) observatory optical upper limit
  41. Fermi GRB 240318A: Global MASTER-Net observations report
  42. GRB 240318A: Fermi GBM Final Real-time Localization
  43. GRB 240317B: Swift/BAT-GUANO arcminute localization of a burst
  44. GRB 240317A: AstroSat CZTI detection
  45. GRB 240315B: AstroSat CZTI detection
  46. X-ray transient EP240315a: Kitab observatory optical upper limitns
  47. X-ray transient EP240315a: Montarrenti Observatory optical upper limit
  48. Fermi GRB 240317B: Global MASTER-Net observations report
  49. Fermi GRB 240317A: Global MASTER-Net observations report
  50. GRB 240317B: Fermi GBM Final Real-time Localization
  51. GRB 240317A: Fermi GBM Final Real-time Localization
  52. X-ray transient EP240315a: VLT/X-shooter spectroscopic redshift of z = 4.859
  53. Fermi trigger No 732299243: Global MASTER-Net observations report
  54. GRID detection of GRB 240306A
  55. Changes to the Fermi-GBM Triggering Thresholds
  56. GRB 240315A: Fermi GBM Final Real-time Localization
  57. Fermi GRB 240314A: Global MASTER-Net observations report
  58. GRB 240314A: Fermi GBM Final Real-time Localization
  59. GRB 240312A: Glowbug gamma-ray detection
  60. Swift Trigger 1219905 is not a GRB
  61. GRB 240312A: GECAM detection of a long burst
  62. GRB 240303C: VZLUSAT-2 detection
  63. GRB 240310A: MASTER OT J200702.72-263928.7 inside 3sigma
  64. Fermi trigger No 731839490: Global MASTER-Net observations report
  65. Fermi-LAT gamma-ray observations of IceCube-240307A
  66. GRB 240310B: Glowbug gamma-ray detection
  67. Fermi GRB 240310A: Global MASTER-Net observations report
  68. GRB 240310A: Fermi GBM Final Real-time Localization
  69. GRB 240309A: MAXI/GSC detection
  70. Swift Trigger 1219325 is not a GRB
  71. GRID detection of GRB 240229A (Updated Report)
  72. GRID detection of GRB 240229A
  73. GRB 240308A: Fermi GBM Final Localization
  74. Fermi trigger No 731571927: Global MASTER-Net observations report
  75. GRB 231215A: further radio observations with the VLA
  76. GRB 240306A: Fermi GBM observation
  77. IceCube-240307A - IceCube observation of a high-energy neutrino candidate track-like event
  78. GRB 240229A: Glowbug gamma-ray detection
  79. GRB 240227A (short): Glowbug gamma-ray detection
  80. GRB 240229A: GRBAlpha detection
  81. Konus-Wind detection of GRB 231118A
  82. GRB 240306A: AstroSat CZTI detection
  83. Fermi GRB 240306A: Global MASTER-Net observations report
  84. Fermi GRB 240305A: Global MASTER-Net observations report
  85. GRB 240306A: Swift/BAT-GUANO detection of a burst
  86. GRB 240305A: Fermi GBM observation
  87. Fermi-LAT gamma-ray observations of IceCube-240229A
  88. GRB 240305C: AstroSat CZTI detection of a short burst
  89. GRB 240306A: Fermi GBM Final Real-time Localization
  90. Fermi GRB 240305C: Global MASTER-Net observations report
  91. GRB 240305C: Fermi GBM Final Real-time Localization
  92. GRB 240305A: Swift/BAT-GUANO arcminute localization of a burst
  93. GRB 231028C: Glowbug gamma-ray confirmation of a prior burst
  94. GRB 240218A: ALMA detection
  95. GRB 240218A: Chandra Detection and Jet Break Confirmation
  96. GRB 240305B: Fermi GBM Final Localization
  97. Fermi trigger No 731303574: Global MASTER-Net observations report
  98. Konus-Wind detection of GRB 240227A (short/hard)
  99. GRB 240303B: VZLUSAT-2 detection
  100. GRB 240229A: VZLUSAT-2 detection

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