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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"

23733 results found.

  1. Fermi GRB 240306A: Global MASTER-Net observations report
  2. Fermi GRB 240305A: Global MASTER-Net observations report
  3. GRB 240306A: Fermi GBM Final Real-time Localization
  4. Swift GRB240305.18: Global MASTER-Net observations report
  5. Swift GRB240305.16: Global MASTER-Net observations report
  6. Fermi GRB 240305C: Global MASTER-Net observations report
  7. GRB 231028C: Glowbug gamma-ray confirmation of a prior burst
  8. Fermi trigger No 731303574: Global MASTER-Net observations report
  9. Konus-Wind detection of GRB 240227A (short/hard)
  10. GRB 240303B: VZLUSAT-2 detection
  11. GRB 240229A: VZLUSAT-2 detection
  12. Improved IPN triangulation of GRB 240227A (short)
  13. IPN triangulation of GRB 240229A
  14. GRB240218A: ATCA observation of the radio counterpart
  15. Transient EPW20240219aa: Optical observations with LDT
  16. Konus-Wind detection of GRB 240303B
  17. Swift Trigger 1218645: Another detection of Swift J151857.0-572147
  18. IPN triangulation of GRB 240303B
  19. Swift J151857.0-572147: Swift-BAT refined analysis
  20. Swift detection of Swift J151857.0-572147
  21. GRB 240303B: CALET Gamma-Ray Burst Monitor detection
  22. Fermi trigger No 731161136: Global MASTER-Net observations report
  23. Swift GRB 240303A: Global MASTER-Net observations report
  24. GRB 240215A: Swift-XRT afterglow detection
  25. GRB 240303A: Swift detection of a burst
  26. GRB 240225B: Glowbug gamma-ray detection
  27. GRB 240225C: Glowbug gamma-ray detection
  28. GRB 240225A (short): Glowbug gamma-ray detection
  29. GRB 240229A: DDOTI Upper Limits on the Afterglow
  30. GRB 240218A: NOEMA upper limit
  31. GRB 240229A: CALET Gamma-Ray Burst Monitor detection
  32. Fermi GRB 240229A: Global MASTER-Net observations report
  33. IceCube Alert 240229.66: Global MASTER-Net observations report
  34. Konus-Wind detection of GRB 240225B (long)
  35. GRB 240225B : MITSuME Akeno optical afterglow candidate detection
  36. GRB 240225B: WINTER near-IR observations and upper limits
  37. GRB 240226A: GRBAlpha detection
  38. Fermi GRB 240227A: Global MASTER-Net observations report
  39. Swift J1727.8-1613 (GRB 230824A): Madrona Peak Observatory - optical follow-up
  40. IPN triangulation of GRB 240227A (short)
  41. Fermi GRB 240226A: Global MASTER-Net observations report
  42. GRB 240225B: CALET Gamma-Ray Burst Monitor detection
  43. Transient EPW20240219aa: Kp-band imaging observations with NIRES
  44. Transient EPW20240219aa: J-band upper limits from WINTER
  45. GRB 240225C: CALET Gamma-Ray Burst Monitor detection
  46. GRB 240225B: GOTO detection of a candidate optical afterglow
  47. Transient EPW20240219aa: REM optical/NIR upper limits
  48. GRB 240225C: GRBAlpha detection
  49. Fermi trigger No 730618809: Global MASTER-Net observations report
  50. GRB 240225B: AstroSat CZTI detection
  51. GRB 240225B: MAXI/GSC detection
  52. Transient EPW20240219aa: Xinglong-2.16m optical upper limit
  53. GRB 240222A: GRBAlpha detection
  54. Transient EPW20240219aa: GECKO: LOAO Optical Upper Limits
  55. VLA X-band observation of EPW20240219aa
  56. Transient EPW20240219aa: upper limit in gamma-ray range from SPI-ACS/INTEGRAL observations
  57. GRB 240222A: Swift-BAT refined analysis
  58. Swift GRB 240222A: Global MASTER-Net observations report
  59. Fermi GRB 240222A: Global MASTER-Net observations report
  60. GRB 240222A: REM optical and NIR early-time observations
  61. Swift GRB240221.92: Global MASTER-Net observations report
  62. GRB 240216A: Glowbug gamma-ray detection
  63. GRB 240218A: Swift-BAT refined analysis
  64. Fermi GRB 240220A: Global MASTER-Net observations report
  65. Konus-Wind detection of GRB 240218A
  66. GRB 240218A: Swift-XRT refined Analysis
  67. GRB 240216A: GRBAlpha detection
  68. GRB 240215B: GRBAlpha detection
  69. IPN triangulation of GRB 240209A
  70. Fermi trigger No 729914426: Global MASTER-Net observations report
  71. GRB 240218A: REM detection of a NIR afterglow candidate
  72. GRB 240213A: GRBAlpha detection
  73. GRB 240218A: Swift detection of a burst
  74. Swift GRB240218.08: Global MASTER-Net observations report
  75. Fermi GRB 240216A: Global MASTER-Net observations report
  76. Fermi trigger No 729719508: Global MASTER-Net observations report
  77. Fermi trigger No 729703985: Global MASTER-Net observations report
  78. Fermi trigger No 729650855: Global MASTER-Net observations report
  79. GRB 240209A: Classification of AT2024cew/GOTO24pw as Type Ia-pec supernova
  80. GRB 240213A: Glowbug gamma-ray detection
  81. The AGILE satellite ceased operations and re-entered today into the atmosphere
  82. The AGILE satellite ceased operations and re-entered today into the atmosphere
  83. GRB 240209A: Wendelstein Optical Observations
  84. GRB 240214A/1H 0451-560: MAXI/GSC detection
  85. Fermi GRB 240213A: Global MASTER-Net observations report
  86. GRB 240209A: NOEMA non-detection of AT2024cew / GOTO24pw counterpart candidate
  87. GRB 240209A: NOT photometry of the AT2024cew / GOTO24pw counterpart candidate
  88. GRB 240209A: GOTO optical counterpart candidate
  89. Konus-Wind detection of GRB 240204A
  90. Konus-Wind detection of GRB 240205A (short)
  91. Fermi trigger No 729152364: Global MASTER-Net observations report
  92. IPN triangulation of GRB 240205A (short)
  93. GRB 240205A (short): Glowbug gamma-ray detection
  94. Swift Trigger 1213872 is not an astrophysical event
  95. GRB240204A: Swift/UVOT Upper Limits
  96. GRB 240205B: AstroSat CZTI detection
  97. Fermi trigger No 729012023: Global MASTER-Net observations report
  98. GRB 240205B: Swift-BAT refined analysis
  99. Konus-Wind detection of GRB 240205B (long / very soft)
  100. Konus-Wind detection of GRB 240125A

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