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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.

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subject:"Swift"
body:"GRB"
submitter:"Judith Racusin"

5529 results found.

  1. Fermi GRB 240328B: Global MASTER-Net observations report
  2. Fermi GRB 240328A: Global MASTER-Net observations report
  3. X-ray transient EP240315a: continued ATCA monitoring
  4. IceCube-240327B: No candidates from the Zwicky Transient Facility
  5. GRB 240328C: Glowbug gamma-ray detection
  6. IceCube Alert 240327.68: Global MASTER-Net observations report
  7. IceCube-240327B - IceCube observation of a high-energy neutrino candidate track-like event
  8. IceCube-240327A - IceCube observation of a high-energy neutrino candidate track-like event
  9. Fermi trigger No 733097506: Global MASTER-Net observations report
  10. X-ray transient EP240315a: Ondrejov D50 optical limit
  11. Fermi trigger No 733092476: Global MASTER-Net observations report
  12. GRB 240320A: Glowbug gamma-ray detection
  13. Fermi trigger No 732937833: Global MASTER-Net observations report
  14. Fermi GRB 240320A: Global MASTER-Net observations report
  15. GRB 240315C / X-ray transient EP240315a: Swift/BAT detection
  16. Fermi trigger No 732657380: Global MASTER-Net observations report
  17. GRB 240318A: Swift/BAT-GUANO detection of a burst outside the coded FOV
  18. X-ray transient EP240315a: ATCA detection of radio counterpart
  19. GRB 240318A: Glowbug gamma-ray detection
  20. GRB 240317C: Glowbug gamma-ray detection
  21. GRB 240318B: Glowbug gamma-ray detection
  22. X-ray transient EP240315a: PRIME near infrared detection
  23. X-ray transient EP240315a: 3.6 m TNG NIR detection
  24. X-ray transient EP240315a/AT2024eju: TShAO (Zeiss-1000) observatory optical upper limit
  25. X-ray transient EP240315a: EP-FXT detection of the X-ray afterglow
  26. Fermi GRB 240318A: Global MASTER-Net observations report
  27. GRB 240317B: Swift/BAT-GUANO arcminute localization of a burst
  28. GRB 240317A: AstroSat CZTI detection
  29. GRB 240315B: AstroSat CZTI detection
  30. X-ray transient EP240315a: Kitab observatory optical upper limitns
  31. X-ray transient EP240315a: Montarrenti Observatory optical upper limit
  32. Fermi GRB 240317B: Global MASTER-Net observations report
  33. Fermi GRB 240317A: Global MASTER-Net observations report
  34. Fermi trigger No 732299243: Global MASTER-Net observations report
  35. Einstein Probe detected of a fast X-ray transient EP240315a
  36. GRID detection of GRB 240306A
  37. Fermi GRB 240314A: Global MASTER-Net observations report
  38. GRB 240312A: Glowbug gamma-ray detection
  39. GRB 240312A: GECAM detection of a long burst
  40. GRB 240303C: VZLUSAT-2 detection
  41. GRB 240310A: MASTER OT J200702.72-263928.7 inside 3sigma
  42. Fermi trigger No 731839490: Global MASTER-Net observations report
  43. Fermi-LAT gamma-ray observations of IceCube-240307A
  44. GRB 240310B: Glowbug gamma-ray detection
  45. Fermi GRB 240310A: Global MASTER-Net observations report
  46. Swift GRB240309.61: Global MASTER-Net observations report
  47. IceCube-240307A: Upper limits from a search for additional neutrino events in IceCube
  48. Fermi trigger No 731571927: Global MASTER-Net observations report
  49. IceCube Alert 240307.32: Global MASTER-Net observations report
  50. GRB 240306A: AstroSat CZTI detection
  51. Fermi GRB 240306A: Global MASTER-Net observations report
  52. Fermi GRB 240305A: Global MASTER-Net observations report
  53. GRB 240306A: Swift/BAT-GUANO detection of a burst
  54. GRB 240305C: AstroSat CZTI detection of a short burst
  55. Swift GRB240305.18: Global MASTER-Net observations report
  56. Swift GRB240305.16: Global MASTER-Net observations report
  57. Fermi GRB 240305C: Global MASTER-Net observations report
  58. GRB 240305A: Swift/BAT-GUANO arcminute localization of a burst
  59. GRB 240305B: Fermi GBM Final Localization
  60. Fermi trigger No 731303574: Global MASTER-Net observations report
  61. GRB 240303B: VZLUSAT-2 detection
  62. IPN triangulation of GRB 240229A
  63. Swift Trigger 1218696: Another trigger on Swift J151857.0-572147
  64. Transient EPW20240219aa: Optical observations with LDT
  65. GRB 240303B: Fermi GBM Detection
  66. Fermi trigger No 731161136: Global MASTER-Net observations report
  67. GRB 240303C: BALROG localization (Fermi Trigger 731189113 / GRB 240303837)
  68. Swift GRB 240303A: Global MASTER-Net observations report
  69. GRB 240303B: BALROG localization (Fermi Trigger 731161136 / GRB 240303513)
  70. GRB 240303B: Fermi GBM Final Localization
  71. IceCube-240229A: Upper limits from a search for additional neutrino events in IceCube
  72. GRB 240229A: DDOTI Upper Limits on the Afterglow
  73. GRB 240225B: further SAO RAS optical observations
  74. Fermi GRB 240229A: Global MASTER-Net observations report
  75. IceCube Alert 240229.66: Global MASTER-Net observations report
  76. GRB 240225B: Mondy afterglow observations
  77. Fermi GRB 240227A: Global MASTER-Net observations report
  78. GRB 240216A: GRBAlpha detection
  79. Fermi trigger No 729914426: Global MASTER-Net observations report
  80. GRB 240214A/1H 0451-560: MAXI/GSC detection
  81. GRB 240209A: GOTO optical counterpart candidate
  82. Fermi trigger No 729152364: Global MASTER-Net observations report
  83. Fermi trigger No 729012023: Global MASTER-Net observations report
  84. Fermi trigger No 728749569: Global MASTER-Net observations report
  85. IceCube-240204A: Upper limits from a search for additional neutrino events in IceCube
  86. GRB 240128A: MAXI/GSC detection
  87. GRB 240123A: further SAO RAS optical observations
  88. GRB 240123A: SAO RAS optical observations
  89. GRB 240123A: Mondy continued optical observations + correction of the GRB name in GCN 35605
  90. GRB 240123B: Fermi GBM Final Real-time Localization
  91. GRB 240122A: MAXI/GSC detection
  92. GRB 240115A: Fermi GBM Observation
  93. GRB 240115A: Swift/BAT-GUANO detection of a short burst
  94. Fermi GRB 240115A: Global MASTER-Net observations report
  95. GRB 240115A: Fermi GBM Final Real-time Localization
  96. GRB 240112C: SAO RAS optical observations
  97. GRB 231215A: radio detection with the VLA
  98. GRB 240107A: MAXI/GSC detection
  99. Fermi trigger No 726347794: Global MASTER-Net observations report
  100. GRB 240102C: AstroSat CZTI detection

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