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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"

28119 results found.

  1. GRB 240225B: Glowbug gamma-ray detection
  2. IceCube-240229A: Upper limits from a search for additional neutrino events in IceCube
  3. GRB 240225C: Glowbug gamma-ray detection
  4. GRB 240225A (short): Glowbug gamma-ray detection
  5. GRB 240229A: DDOTI Upper Limits on the Afterglow
  6. GRB 240218A: NOEMA upper limit
  7. GRB 240225B: further SAO RAS optical observations
  8. GRB 240229A: BALROG localization (Fermi Trigger 730908432 / GRB 240229588)
  9. GRB 240225B: VLT/X-shooter redshift
  10. GRB 240225B : MITSuME Akeno optical afterglow candidate detection
  11. GRB 240225B: 3.6m DOT observation
  12. GRB 240225B: WINTER near-IR observations and upper limits
  13. GRB 240225B: SAO RAS optical observations
  14. GRB 240225B: Mondy afterglow observations
  15. GRB 240218A: CMO SAI NIR upper limit
  16. GRB 240225B: Nanshan/HMT optical afterglow detection
  17. GRB 240225B: Swift-XRT observations
  18. Transient EPW20240219aa: Kp-band imaging observations with NIRES
  19. Transient EPW20240219aa: J-band upper limits from WINTER
  20. Transient EPW20240219aa: REM optical/NIR upper limits
  21. GRB 240225B: AstroSat CZTI detection
  22. GRB 240225B: MAXI/GSC detection
  23. Transient EPW20240219aa: Xinglong-2.16m optical upper limit
  24. GRB 240225A: Swift/BAT-GUANO detection of a short burst
  25. Transient EPW20240219aa: GECKO: LOAO Optical Upper Limits
  26. Transient EPW20240219aa: 7DT Optical Upper Limits
  27. VLA X-band observation of EPW20240219aa
  28. Transient EPW20240219aa: Mondy optical observations
  29. Transient EPW20240219aa: upper limit in gamma-ray range from SPI-ACS/INTEGRAL observations
  30. Insight-HXMT/HE Sub-Threshold Detection of Transient EPW20240219aa
  31. Transient EPW20240219aa: Liverpool Telescope non-detection and limiting magnitude
  32. GRB 240222A: GECAM detection of a burst
  33. GRB 240222A: Swift-BAT refined analysis
  34. GRB 240222A: Swift-XRT refined Analysis
  35. GRB 240222A: Fermi GBM Observation
  36. GRB 240222A: Swift/UVOT Upper Limits
  37. Fermi GBM Sub-Threshold Detection of EPW20240219aa as a likely GRB
  38. GRB 240222A: REM optical and NIR early-time observations
  39. GRB 240222A: Swift detection of a burst
  40. GRB 240218A: MeerLICHT upper limits
  41. GRB 240216A: Glowbug gamma-ray detection
  42. GRB 240215B: Fermi GBM Observation
  43. GRB 240218A: LBT H-band detection
  44. GRB 240218A: Swift-BAT refined analysis
  45. GRB 240218A: Swift-XRT refined Analysis
  46. GRB 240218A: VLT/X-shooter redshift of z = 6.782
  47. GRB 240218A: Fermi GBM Detection
  48. GRB 240215A: Fermi GBM Observation
  49. GRB 240218A: Enhanced Swift-XRT position
  50. GRB 240218A: REM detection of a NIR afterglow candidate
  51. GRB 240218A : r-band upper limit from Observatoire de Haute-Provence
  52. GRB240218A: VLT/X-shooter upper limits
  53. GRB 240218A: Swift detection of a burst
  54. GRB 240215B: Swift/BAT-GUANO detection of a burst outside the coded FOV
  55. GRB 240215A: Swift/BAT-GUANO localization of a burst
  56. GRB 240213A: Glowbug gamma-ray detection
  57. GRB 240128A: Further Swift-XRT observations
  58. GRB 240214A/1H 0451-560: MAXI/GSC detection
  59. GRB 240213A: BALROG localization (Fermi Trigger / GRB 240213841)
  60. GRB 240209A: NOT photometry of the AT2024cew / GOTO24pw counterpart candidate
  61. GRB 240209A: GOTO optical counterpart candidate
  62. Konus-Wind detection of GRB 240204A
  63. IPN triangulation of GRB 240205A (short)
  64. Fermi-LAT gamma-ray observations of IceCube-240204A
  65. GRB 240205B: PRIME near infrared detection
  66. GRB 240205A (short): Glowbug gamma-ray detection
  67. GRB240204A: Swift/UVOT Upper Limits
  68. GRB 240205B: Swift-BAT refined analysis
  69. Konus-Wind detection of GRB 240205B (long / very soft)
  70. GRB 240205B: VLT/X-shooter redshift
  71. GRB 240205B: REM detection of the optical/NIR afterglow
  72. GRB 240205B: Fermi GBM Observation
  73. GRB 240204A : OHP/T193/T120 optical afterglow fading detection
  74. GRB 240205B: GECAM detection of a long burst
  75. GRB 240204A: Swift-BAT refined analysis
  76. GRB 240205B: Skynet Optical Afterglow Observations
  77. Fermi trigger No 728749569: Global MASTER-Net observations report
  78. GRB 240204A: Fermi GBM Observation
  79. GRB 240204a: Liverpool Telescope optical afterglow detection
  80. GRB 240204A: Osservatorio Astronomico Nastro Verde upper limit
  81. IceCube-240204A: Upper limits from a search for additional neutrino events in IceCube
  82. GRB 240204A: optical afterglow detection with LCOGT 1m telescopes at Sutherland and Teide Observatories
  83. GRB 240204A: Montarrenti Observatory optical observations
  84. GRB 240204A: Enhanced Swift-XRT position
  85. GRB 240204A: Mondy optical afterglow candidate
  86. GRB 240204A: Swift detection of a burst
  87. Konus-Wind detection of GRB 240123C
  88. IPN triangulation of GRB 240124B
  89. GRB 240129A: Fermi GBM Observation
  90. GRB 240129A: Swift/BAT-GUANO detection of a burst outside the coded FOV
  91. GRB 240128A: Glowbug gamma-ray detection
  92. GRB 240128A: Swift-XRT observations
  93. GRB 240125A: GRBAlpha detection
  94. IceCube-240123A: Upper limits from a search for additional neutrino events in IceCube
  95. GRB 240125A: AstroSat CZTI detection of a short burst
  96. GRB 240124B: AstroSat CZTI detection
  97. GRB 240123C: AstroSat CZTI detection
  98. GRB240122A: PRIME near infrared detection
  99. GRB 240123B: Fermi GBM Observation
  100. GRB 240123A: Glowbug gamma-ray detection

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