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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').
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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"

11659 results found.

  1. GRB 231129C: Fermi GBM Observation of a very bright GRB
  2. GRB 231129C: iTelescope likely optical afterglow AT 2023yph discovery
  3. GRB 231129C: Tiled Swift observations
  4. GRB 231129C: BALROG localization (Fermi Trigger / GRB 231129799)
  5. GRB 231129C: Fermi GBM detection of a very bright burst
  6. GRB 231129C: Fermi GBM Final Real-time Localization
  7. Fermi trigger No 722977823: Global MASTER-Net observations report
  8. Fermi-LAT gamma-ray observations of IceCube-231125A
  9. GRB 231128A: Fermi GBM Final Real-time Localization
  10. GRB 231123C: Fermi GBM Observation
  11. GRB 231123B: Fermi GBM Observation
  12. GRB 231123B: Swift/BAT-GUANO detection of a burst outside the coded FOV
  13. GRB 231124A: GRBAlpha detection
  14. IceCube-231125A - IceCube observation of a high-energy neutrino candidate track-like event
  15. Fermi trigger No 722653947: Global MASTER-Net observations report
  16. GRB 231126A: Fermi GBM Final Real-time Localization
  17. GRB 231123C: Insight-HXMT/HE detection
  18. Fermi trigger No 722460326: Global MASTER-Net observations report
  19. Fermi trigger No 722507896: Global MASTER-Net observations report
  20. GRB 231123C (short): Glowbug gamma-ray detection
  21. GRB 231124A: Glowbug gamma-ray detection
  22. GRB 231123C: Swift/BAT-GUANO detection of a short burst likely outside the coded FOV
  23. Fermi trigger No 722462310: Global MASTER-Net observations report
  24. GRB 231124A: CALET Gamma-Ray Burst Monitor detection
  25. GRB 231115A: XMM-Newton observation
  26. GRB 231124A: Fermi GBM Final Real-time Localization
  27. GRB 231123A: AstroSat CZTI detection
  28. GRB 231123C: Fermi GBM Final Real-time Localization
  29. GRB 231123B: Fermi GBM Final Real-time Localization
  30. Fermi trigger No 722400249: Global MASTER-Net observations report
  31. GRB 231118A: REM optical afterglow detection
  32. GRB 231123A: Fermi GBM Final Real-time Localization
  33. GRB 231122B: Glowbug gamma-ray detection
  34. Fermi trigger No 722349867: Global MASTER-Net observations report
  35. GRB 231122A: GECAM detection
  36. GRB 231122B: GECAM detection
  37. GRB 231122A: Fermi GBM Final Real-time Localization
  38. GRB 231118A: ATCA detection of radio counterpart
  39. GRB 231118A: GRBAlpha detection
  40. GRB 231118A: VZLUSAT-2 detection
  41. Konus-Wind detection of GRB 231020A
  42. GRB 231118B: CALET Gamma-Ray Burst Monitor detection
  43. GRB 231118B: Fermi GBM observation
  44. GRB 231118A: Fermi GBM observation
  45. GRB 231120A: Fermi GBM Final Real-time Localization
  46. GRB 231118A: VLT/X-shooter redshift
  47. Fermi trigger No 722039659: Global MASTER-Net observations report
  48. GRB 231118A: AstroSat CZTI detection
  49. GRB 231115A: Upper limit from CALET Gamma-Ray Burst Monitor
  50. GRB 231118A: Las Cumbres optical detection
  51. GRB 231118B: BALROG localization (Fermi Trigger 722039659 / GRB 231118940)
  52. GRB 231118B: Fermi GBM Final Real-time Localization
  53. GRB 231118A: LCOGT Optical Observations
  54. GRB 231118A: MASTER OT observation
  55. GRB 231118A: Fermi GBM Final Real-time Localization
  56. GRB 231115A: Wendelstein Optical/Infrared Observations
  57. GRB 231115A: JinShan optical upper limits
  58. GRB 231115A : OHP/T120 optical upper limit
  59. GRB 231115A: optical observations from INAF observatories
  60. GRB 231115A: Non-detection of radio emission with CHIME/FRB
  61. GRB231115A: Liverpool Telescope imaging
  62. GRB 231115A: Swift/BAT-GUANO detection of a short burst
  63. Fermi GRB 231116A: Global MASTER-Net observations report
  64. Konus-Wind detection of GRB 231115A (a probable Magnetar Giant Flare from M82)
  65. GRB 231115A: AGILE/MCAL upper limits
  66. GRB 231115A: Insight-HXMT/HE detection
  67. GRB 231115A: GBM/Fermi Observations of a probable Giant Flare of Magnetar
  68. GRB 231116A: Fermi GBM Final Real-time Localization
  69. GRB 231115A : MITSuME Akeno and Okayama optical upper limits
  70. GRB 231115A: Gaoyazi/GOT follow-up and archival observations
  71. GRB 231115A: Upper limits from a neutrino search with IceCube
  72. GRB 231115A: Kinder observations with Lulin observatory
  73. GRB231115A: GRANDMA Observations
  74. GRB 231115A: GOTO pre-burst limits of AT2023xvj
  75. GRB 231115A: Non-detection in low-latency of gravitational waves with LIGO/Virgo/KAGRA
  76. GRB 231106A: TESS identification of candidate optical counterpart
  77. GRB 231115A: MASTER optical observations
  78. GRB 231115A (short): Glowbug gamma-ray detection
  79. GRB 231115A: Fermi Observations of a probable Magnetar Giant Flare from M82
  80. GRB 231115A: GROWTH-India discovery of a potential optical counterpart
  81. Fermi GRB 231115A: Global MASTER-Net observations report
  82. GRB 231115A: a short hard GRB detected by IBAS, poistionally coincident with M82
  83. GRB 231115A position consistent with M 82 galaxy
  84. GRB 231115A: Fermi GBM Final Real-time Localization
  85. Fermi GRB 231114A: Global MASTER-Net observations report
  86. GRB 231114A (short): Glowbug gamma-ray detection
  87. GECAM-B observation of a short burst from SGR J1555-5402
  88. GRB 231114A: Fermi GBM Final Localization
  89. SGRJ1555-5402: Swift/BAT-GUANO arcminute localization of a SGR flare
  90. LIGO/Virgo/KAGRA S231113bw: Upper limits from Fermi-GBM Observations
  91. GRB 231106A: Glowbug gamma-ray detection
  92. GRB 231104A: VZLUSAT-2 detection
  93. GRB 231109A: Fermi GBM Final Localization
  94. Fermi trigger No 721204446: Global MASTER-Net observations report
  95. Fermi GRB 231108A: Global MASTER-Net observations report
  96. GRB 231108A: Fermi GBM Final Real-time Localization
  97. GRB 231106A: AstroSat CZTI detection
  98. GRB 231106A: CALET Gamma-Ray Burst Monitor detection
  99. Fermi trigger No 721006392: Global MASTER-Net observations report
  100. Fermi Gamma-ray Burst Monitor trigger 231107654 / 721064512 is not a GRB

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