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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"

37351 results found.

  1. IPN triangulation of GRB 240410A
  2. IPN triangulation of GRB 240411A
  3. GRB 240414A : MITSuME Akeno optical upper limits
  4. GRB 240414A: Redshift confirmation from GTC/OSIRIS+
  5. GRB 240414A : OHP/T193 redshift determination
  6. GRB 240414A : OHP/T193 optical counterpart detection
  7. GRB 240414A: Swift detection of a burst
  8. LIGO/Virgo/KAGRA S240413p: Zwicky Transient Facility observations
  9. GRB 240411B: CrAO/ZTSh optical observations
  10. GRB 240411B: Kinder observations with Lulin observatory
  11. GRB 240411B: HiPERCAM/GTC observation
  12. GRB 240411B: Swift-BAT refined analysis
  13. GRB 240411B: Swift-XRT refined Analysis
  14. GRB 240411B: 1.3m DFOT Optical observations
  15. GRB 240411A: GRBAlpha detection
  16. GRB 240411B: OHP/T193 optical observations
  17. GRB 240405A: Glowbug gamma-ray detection
  18. GRB 240411B: Enhanced Swift-XRT position
  19. GRB 240411B: LCO optical afterglow detection
  20. GRB 240411B: Swift detection of a burst
  21. GRB 240408B: GRBAlpha detection
  22. GRB 240411A: Fermi GBM Final Real-time Localization
  23. EP240408a: Upper limits from GECAM-B Observation
  24. GRB 240405A: GRBAlpha detection
  25. GRB 240408B: AstroSat CZTI detection
  26. Fermi GRB 240408A: Global MASTER-Net observations report
  27. GRB 240408A: Fermi GBM Final Real-time Localization
  28. GRB 240407A: BALROG localization (Fermi Trigger 734144396 / GRB 240407042)
  29. GRB 240402C: CALET Gamma-Ray Burst Monitor detection
  30. Fermi GRB 240407A: Global MASTER-Net observations report
  31. GRB 240407A: Fermi GBM Final Real-time Localization
  32. LXT 240402A/GRB 240402B: rest-frame energetics from Konus-Wind observation
  33. Fermi GRB 240405B: Global MASTER-Net observations report
  34. GRB 240405B: Fermi GBM Final Real-time Localization
  35. GRB 240402C: Glowbug gamma-ray detection
  36. GRB 240405A: Fermi GBM Final Real-time Localization
  37. GRB 240402C: GRBAlpha detection
  38. GRB 240331A: GRBAlpha detection
  39. LXT 240402A/GRB 240402B: GECAM-C refined analysis
  40. GRB 240403B: Glowbug gamma-ray detection
  41. GRB 240403A: Glowbug gamma-ray detection
  42. LXT 240402A/GRB 240402B: Glowbug gamma-ray detection
  43. Konus-Wind detection of LXT 240402A/GRB 240402B
  44. GRB/FXT 240402B: Kinder optical counterpart candidate
  45. GRB/FXT 240402B: VLT/FORS2 optical afterglow candidate
  46. GRB 240403A: Fermi GBM Detection
  47. LXT 240402A: EP-FXT detection of the X-ray afterglow
  48. Fermi GRB 240404A: Global MASTER-Net observations report
  49. GRB 240404A: Fermi GBM Final Real-time Localization
  50. GRB 240402B: GWAC-F50A optical upper limit
  51. GRB 240402B: GECAM-C detection
  52. GRB 240403A: BALROG localization (Fermi Trigger 733838255 / GRB 240403498)
  53. Fermi GRB 240402A: Global MASTER-Net observations report
  54. GRB 240402A: Fermi GBM Final Real-time Localization
  55. X-ray transient EP240331a: Kinder optical upper limits
  56. IBAS Alert n.10651 not a GRB
  57. GRB 240329A: Glowbug gamma-ray detection
  58. GRB 240324A: AstroSat CZTI detection of a short burst
  59. GRB 240331A: AstroSat CZTI detection
  60. GRB 240329A: AstroSat CZTI detection
  61. GRB 240331A: Fermi GBM Final Real-time Localization
  62. GRB 240329A: GRBAlpha detection
  63. Fermi GRB 240329A: Global MASTER-Net observations report
  64. GRB 240329A: BALROG localization (Fermi Trigger 733441392 / GRB 240329905)
  65. GRB 240329A: Fermi GBM Final Real-time Localization
  66. Fermi GRB 240328B: Global MASTER-Net observations report
  67. Fermi GRB 240328A: Global MASTER-Net observations report
  68. GRB 240328C: Glowbug gamma-ray detection
  69. GRB 240328B: Fermi GBM Final Real-time Localization
  70. GRB 240328A: Fermi GBM Final Real-time Localization
  71. X-ray transient EP 240315a: Second epoch Chandra observations
  72. Transient EPW20240219aa: REM optical/NIR further observations
  73. GRB 240320A: Glowbug gamma-ray detection
  74. GRB 240318A: Fermi GBM Observation
  75. Fermi GRB 240320A: Global MASTER-Net observations report
  76. Konus-Wind detection of GRB 240315C (possible counterpart of EP240315a)
  77. GRB 240315C / X-ray transient EP240315a: Swift/BAT detection
  78. GRB 240318A: Swift/BAT-GUANO detection of a burst outside the coded FOV
  79. GRB 240320A: Fermi GBM Final Real-time Localization
  80. IPN triangulation of GRB 240315C (consistent with a fast X-ray transient EP240315a)
  81. GRB 240317B: Swift/BAT-GUANO Angular Error Correction
  82. Fermi Gamma-ray Burst Monitor trigger 732299243/240316686 is not a GRB
  83. GRB 240318A: Glowbug gamma-ray detection
  84. GRB 240317C: Glowbug gamma-ray detection
  85. GRB 240318B: Glowbug gamma-ray detection
  86. GRB 240317B: Fermi GBM Observation
  87. X-ray transient EP240315a/AT2024eju: TShAO (Zeiss-1000) observatory optical upper limit
  88. Fermi GRB 240318A: Global MASTER-Net observations report
  89. GRB 240318A: Fermi GBM Final Real-time Localization
  90. GRB 240317B: Swift/BAT-GUANO arcminute localization of a burst
  91. GRB 240317A: AstroSat CZTI detection
  92. GRB 240315B: AstroSat CZTI detection
  93. X-ray transient EP240315a: Kitab observatory optical upper limitns
  94. X-ray transient EP240315a: Montarrenti Observatory optical upper limit
  95. Fermi GRB 240317B: Global MASTER-Net observations report
  96. Fermi GRB 240317A: Global MASTER-Net observations report
  97. GRB 240317B: Fermi GBM Final Real-time Localization
  98. GRB 240317A: Fermi GBM Final Real-time Localization
  99. X-ray transient EP240315a: Kinder follow-up observations for AT 2024eju with Lulin observatory
  100. X-ray transient EP240315a: VLT/X-shooter spectroscopic redshift of z = 4.859

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