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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"

12113 results found.

  1. AGILE observations of a burst from SGR 1935+2154
  2. GECAM observations of a series of bursts from SGR J1935+2154
  3. GRB 220111A: AstroSat CZTI detection
  4. Fermi GRB 220111A: Global MASTER-Net observations report
  5. Konus-Wind detection of GRB 220101A
  6. Fermi Gamma-ray Burst Monitor trigger 220111325/663580106 is not a GRB
  7. Konus-Wind detection of GRB 220107B
  8. Konus-Wind detection of GRB 220107A
  9. GECAM observations of a series of bursts from SGR J1935+2154
  10. GRB 220107A: further SAO RAS optical observations
  11. GRB 220108A: Swift/BAT-GUANO detection outside the coded FOV
  12. GRB 220107B: Nanshan/NEXT optical upper limits and host galaxy candidate
  13. GRB 220107A: MITSuME Akeno optical observation
  14. GRB 220107B: AstroSat CZTI detection
  15. GRB 220107A: Swift-XRT afterglow detection
  16. GRB 220107B: Fermi-LAT detection
  17. GRB 220107A: AstroSat CZTI detection
  18. Fermi GRB 220107A: Global MASTER-Net observations report
  19. GRB 220101A: Tautenburg observations
  20. GECAM observation of a burst from SGR J1555.2-5402
  21. GECAM detection of a short burst from SGR 1935+2154
  22. GRB 220101A: further TNG NIR observations
  23. GECAM observations of a series of bursts from SGR J1935+2154
  24. Fermi GRB 220103A: Global MASTER-Net observations report
  25. GRB 211229B: Swift/BAT-GUANO detection outside the coded FOV
  26. GRB 220101A: TNG NIR afterglow detection
  27. GRB 220101A: ALMA detection
  28. GRB 211231A: AstroSat CZTI detection
  29. GRB 220101A: NOT redshift confirmation
  30. GRB 220101A: Liverpool telescope imaging of a high-redshift afterglow
  31. GRB 220101A: Swift-XRT refined Analysis
  32. GRB 220101A: AGILE detection
  33. GRB 220101A: Fermi-LAT detection
  34. GRB 211229B: AGILE detection
  35. GRB 211229A: Swift-XRT and UVOT observations
  36. GRB 211229C: Swift/BAT-GUANO detection likely outside the coded FOV
  37. GRB 211229A: Swift/BAT-GUANO arcminute localization
  38. GRB 211229A: GECAM detection
  39. GRB 211227A: Swift-XRT refined Analysis
  40. Konus-Wind detection of the intermediate flare from SGR 1935+2154
  41. GRB 211227A: BOOTES-2/TELMA optical upper limit
  42. GRB 211227A: Swift detection of a burst
  43. GRB 211226A: Swift/BAT-GUANO detection outside the coded FOV
  44. GRB 211226A: AGILE/MCAL detection of a burst
  45. GRB 211225A/MAXI J0827-071: MAXI/GSC detection
  46. Fermi trigger No 662084433: Global MASTER-Net observations report
  47. GRB 211223C: Swift-BAT refined analysis
  48. AGILE observations of a bright burst from SGR 1935+2154
  49. GRB 211223C: BOOTES-4/MET optical upper limit
  50. Fermi GBM Sub-Threshold Detection of GRB 211221A
  51. Fermi GBM Sub-Threshold Detection of GRB 211207A
  52. GRB 211221A: Swift-BAT refined analysis
  53. GRB 211223C: Swift detection of a burst
  54. GRB 211221A: NUTTelA-TAO / BSTI Early Optical Limits (Preliminary)
  55. GRB 211219B: AstroSat CZTI detection
  56. GRB 211219A: AstroSat CZTI detection
  57. GRB 211221A: BOOTES-4/MET optical upper limit
  58. GRB 211218A: MITSuME Akeno optical upper limits
  59. Swift GRB 211221A: Global MASTER-Net observations report
  60. GRB 211221A: Swift detection of a burst
  61. GRB 211219A: Swift/BAT-GUANO detection outside the coded FOV
  62. Fermi GRB 211219B: Global MASTER-Net observations report
  63. GRB 211216A: Fermi GBM observation
  64. GRB 211218A, MAXI J0909-041: MAXI/GSC detection
  65. MAXI GRB211218.04: Global MASTER-Net observations report
  66. GRB 211106A: XMM-Newton monitoring campaign detections
  67. Fermi-LAT Gamma-ray Observations of IceCube-211216B
  68. Fermi-LAT Gamma-ray Observations of IceCube-211216A
  69. GRB 211216A: Swift/BAT-GUANO detection outside the coded FOV
  70. GRB 211216A: GECAM detection
  71. Fermi GRB 211216A: Global MASTER-Net observations report
  72. GRB 211211A - Gemini K-band detection
  73. Chandra observation of GW170817 at ~1575 days since merger (all epochs)
  74. GRB 211211B: GECAM detection
  75. GRB 211211A: MITSuME Akeno optical observation
  76. GRB 211211A: Swift-XRT refined Analysis
  77. Fermi GRB 211211B: Global MASTER-Net observations report
  78. Fermi trigger No 660868196: Global MASTER-Net observations report
  79. IceCube-211208A: No significant detection in HAWC
  80. Fermi trigger No 660736561: Global MASTER-Net observations report
  81. IceCube-211208A: Upper limits from a search for additional neutrino events in IceCube
  82. Fermi-LAT Gamma-ray Observations of IceCube-211208A
  83. IceCube-211208A: No counterpart candidates in INTEGRAL SPI-ACS and IBIS prompt observation
  84. IceCube-211208A - IceCube observation of a high-energy neutrino candidate track-like event
  85. IceCube Alert 211208.84: Global MASTER-Net observations report
  86. Chandra observation of GW170817 at ~1573 days since merger (Epoch 1 of 4)
  87. GRB 211207A: Swift-XRT refined Analysis
  88. GRB 211207A: Swift detection of a burst with an optical counterpart
  89. GRB 211206A: AstroSat CZTI detection
  90. GRB 211206B: AstroSat CZTI detection
  91. GRB 211204C: AstroSat CZTI detection
  92. GRB 211206A: Swift/BAT-GUANO detection outside the coded FOV
  93. GRB 211206A: AGILE/MCAL detection of a burst
  94. GRB 211204C: Swift/BAT-GUANO detection outside the coded FOV
  95. Konus-Wind detection of GRB 211130A
  96. GRB 211201A: Swift/BAT-GUANO detection likely outside the coded FOV
  97. GRB 211201A: Fermi GBM Final Real-time Localization
  98. GRB 211106A: GECAM detection
  99. GRB 211129A: Swift-XRT refined Analysis
  100. Swift GRB 211129A: Global MASTER-Net observations report

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