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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"

12121 results found.

  1. GECAM observations of a series of bursts from SGR J1935+2154
  2. Fermi trigger No 663967527: Global MASTER-Net observations report
  3. Fermi trigger No 663899819: Global MASTER-Net observations report
  4. Fermi trigger No 663966693: Global MASTER-Net observations report
  5. Fermi trigger No 663921434: Global MASTER-Net observations report
  6. GECAM observations of a series of bursts from SGR J1935+2154
  7. Fermi trigger No 663710289: Global MASTER-Net observations report
  8. Fermi-GBM Observations of Recent Bursting Activity from SGR J1935+2154
  9. AGILE observations of a burst from SGR 1935+2154
  10. GECAM observations of a series of bursts from SGR J1935+2154
  11. GRB 220111A: AstroSat CZTI detection
  12. Fermi GRB 220111A: Global MASTER-Net observations report
  13. Konus-Wind detection of GRB 220101A
  14. Fermi Gamma-ray Burst Monitor trigger 220111325/663580106 is not a GRB
  15. Konus-Wind detection of GRB 220107B
  16. Konus-Wind detection of GRB 220107A
  17. GECAM observations of a series of bursts from SGR J1935+2154
  18. GRB 220107A: further SAO RAS optical observations
  19. GRB 220108A: Swift/BAT-GUANO detection outside the coded FOV
  20. GRB 220107B: Nanshan/NEXT optical upper limits and host galaxy candidate
  21. GRB 220107A: MITSuME Akeno optical observation
  22. GRB 220107B: AstroSat CZTI detection
  23. GRB 220107A: Swift-XRT afterglow detection
  24. GRB 220107B: Fermi-LAT detection
  25. GRB 220107A: AstroSat CZTI detection
  26. Fermi GRB 220107A: Global MASTER-Net observations report
  27. GRB 220101A: Tautenburg observations
  28. GECAM observation of a burst from SGR J1555.2-5402
  29. GECAM detection of a short burst from SGR 1935+2154
  30. GRB 220101A: further TNG NIR observations
  31. GECAM observations of a series of bursts from SGR J1935+2154
  32. Fermi GRB 220103A: Global MASTER-Net observations report
  33. GRB 211229B: Swift/BAT-GUANO detection outside the coded FOV
  34. GRB 220101A: TNG NIR afterglow detection
  35. GRB 220101A: ALMA detection
  36. GRB 211231A: AstroSat CZTI detection
  37. GRB 220101A: NOT redshift confirmation
  38. GRB 220101A: Liverpool telescope imaging of a high-redshift afterglow
  39. GRB 220101A: Swift-XRT refined Analysis
  40. GRB 220101A: AGILE detection
  41. GRB 220101A: Fermi-LAT detection
  42. GRB 211229B: AGILE detection
  43. GRB 211229A: Swift-XRT and UVOT observations
  44. GRB 211229C: Swift/BAT-GUANO detection likely outside the coded FOV
  45. GRB 211229A: Swift/BAT-GUANO arcminute localization
  46. GRB 211229A: GECAM detection
  47. GRB 211227A: Swift-XRT refined Analysis
  48. Konus-Wind detection of the intermediate flare from SGR 1935+2154
  49. GRB 211227A: BOOTES-2/TELMA optical upper limit
  50. GRB 211227A: Swift detection of a burst
  51. GRB 211226A: Swift/BAT-GUANO detection outside the coded FOV
  52. GRB 211226A: AGILE/MCAL detection of a burst
  53. GRB 211225A/MAXI J0827-071: MAXI/GSC detection
  54. Fermi trigger No 662084433: Global MASTER-Net observations report
  55. GRB 211223C: Swift-BAT refined analysis
  56. AGILE observations of a bright burst from SGR 1935+2154
  57. GRB 211223C: BOOTES-4/MET optical upper limit
  58. Fermi GBM Sub-Threshold Detection of GRB 211221A
  59. Fermi GBM Sub-Threshold Detection of GRB 211207A
  60. GRB 211221A: Swift-BAT refined analysis
  61. GRB 211223C: Swift detection of a burst
  62. GRB 211221A: NUTTelA-TAO / BSTI Early Optical Limits (Preliminary)
  63. GRB 211219B: AstroSat CZTI detection
  64. GRB 211219A: AstroSat CZTI detection
  65. GRB 211221A: BOOTES-4/MET optical upper limit
  66. GRB 211218A: MITSuME Akeno optical upper limits
  67. Swift GRB 211221A: Global MASTER-Net observations report
  68. GRB 211221A: Swift detection of a burst
  69. GRB 211219A: Swift/BAT-GUANO detection outside the coded FOV
  70. Fermi GRB 211219B: Global MASTER-Net observations report
  71. GRB 211216A: Fermi GBM observation
  72. GRB 211218A, MAXI J0909-041: MAXI/GSC detection
  73. MAXI GRB211218.04: Global MASTER-Net observations report
  74. GRB 211106A: XMM-Newton monitoring campaign detections
  75. Fermi-LAT Gamma-ray Observations of IceCube-211216B
  76. Fermi-LAT Gamma-ray Observations of IceCube-211216A
  77. GRB 211216A: Swift/BAT-GUANO detection outside the coded FOV
  78. GRB 211216A: GECAM detection
  79. Fermi GRB 211216A: Global MASTER-Net observations report
  80. GRB 211211A - Gemini K-band detection
  81. Chandra observation of GW170817 at ~1575 days since merger (all epochs)
  82. GRB 211211B: GECAM detection
  83. GRB 211211A: MITSuME Akeno optical observation
  84. GRB 211211A: Swift-XRT refined Analysis
  85. Fermi GRB 211211B: Global MASTER-Net observations report
  86. Fermi trigger No 660868196: Global MASTER-Net observations report
  87. IceCube-211208A: No significant detection in HAWC
  88. Fermi trigger No 660736561: Global MASTER-Net observations report
  89. IceCube-211208A: Upper limits from a search for additional neutrino events in IceCube
  90. Fermi-LAT Gamma-ray Observations of IceCube-211208A
  91. IceCube-211208A: No counterpart candidates in INTEGRAL SPI-ACS and IBIS prompt observation
  92. IceCube-211208A - IceCube observation of a high-energy neutrino candidate track-like event
  93. IceCube Alert 211208.84: Global MASTER-Net observations report
  94. Chandra observation of GW170817 at ~1573 days since merger (Epoch 1 of 4)
  95. GRB 211207A: Swift-XRT refined Analysis
  96. GRB 211207A: Swift detection of a burst with an optical counterpart
  97. GRB 211206A: AstroSat CZTI detection
  98. GRB 211206B: AstroSat CZTI detection
  99. GRB 211204C: AstroSat CZTI detection
  100. GRB 211206A: Swift/BAT-GUANO detection outside the coded FOV

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