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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"

11846 results found.

  1. GRB 220118A: TARGET optical upper limit
  2. GRB 220117B: TARGET optical upper limit
  3. Fermi-LAT-ANTARES 220121a: upper limits from a search for coincident neutrinos with IceCube
  4. AGILE observations of a bright burst from SGR 1935+2154
  5. Konus-Wind detection of an intermediate flare from SGR 1935+2154 on January 20
  6. GRB 220117A: Konus-Wind detection and joint Konus-Wind + Swift-BAT spectral analysis
  7. IPN triangulation of GRB 211226A
  8. GRB 220120A: Fermi GBM Final Localization
  9. GRB 220118A: Fermi GBM detection
  10. GRB 220117C: Swift/BAT-GUANO arcminute localization
  11. Konus-Wind observation of the recent SGR 1935+2154 activity
  12. GRB 220118A: Swift detection of a burst with an optical counterpart
  13. GRB 220118A: Fermi GBM Final Real-time Localization
  14. Fermi-LAT Gamma-ray Observations of IceCube-220115A and detection of a new gamma-ray source, Fermi J2350.2+2620
  15. GRB 220117B: Swift-XRT refined Analysis
  16. GRB 220117A: Swift-XRT refined Analysis
  17. GRB 220117B: Nanshan/NEXT optical upper limit
  18. GRB 220117B: MITSuME Akeno optical upper limits
  19. GRB 220101A: TSHAO optical observation, Terskol, AbAO upper limits
  20. Swift GRB 220117A: Global MASTER-Net observations report
  21. Swift GRB 220117B: Global MASTER-Net observations report
  22. GRB 220117B: Swift detection of a burst
  23. GRB 220117A: Swift detection of a burst
  24. Fermi trigger No 663967527: Global MASTER-Net observations report
  25. Fermi trigger No 663899819: Global MASTER-Net observations report
  26. Fermi trigger No 663966693: Global MASTER-Net observations report
  27. Fermi trigger No 663921434: Global MASTER-Net observations report
  28. Fermi trigger No 663710289: Global MASTER-Net observations report
  29. AGILE observations of a burst from SGR 1935+2154
  30. GRB 220111A: AstroSat CZTI detection
  31. Fermi GRB 220111A: Global MASTER-Net observations report
  32. Konus-Wind detection of GRB 220101A
  33. Konus-Wind detection of GRB 220107B
  34. Konus-Wind detection of GRB 220107A
  35. GRB 220107A: further SAO RAS optical observations
  36. GRB 220108A: Swift/BAT-GUANO detection outside the coded FOV
  37. GRB 220107B: Nanshan/NEXT optical upper limits and host galaxy candidate
  38. GRB 220107A: MITSuME Akeno optical observation
  39. GRB 220107B: AstroSat CZTI detection
  40. GRB 220107A: Swift-XRT afterglow detection
  41. GRB 220107B: Fermi-LAT detection
  42. GRB 220107A: AstroSat CZTI detection
  43. Fermi GRB 220107A: Global MASTER-Net observations report
  44. GRB 220101A: Tautenburg observations
  45. GRB 220101A: further TNG NIR observations
  46. Fermi GRB 220103A: Global MASTER-Net observations report
  47. GRB 211229B: Swift/BAT-GUANO detection outside the coded FOV
  48. GRB 220101A: TNG NIR afterglow detection
  49. GRB 220101A: ALMA detection
  50. GRB 211231A: AstroSat CZTI detection
  51. GRB 220101A: NOT redshift confirmation
  52. GRB 220101A: Liverpool telescope imaging of a high-redshift afterglow
  53. GRB 220101A: Swift-XRT refined Analysis
  54. GRB 220101A: AGILE detection
  55. GRB 220101A: Fermi-LAT detection
  56. GRB 211229B: AGILE detection
  57. GRB 211229A: Swift-XRT and UVOT observations
  58. GRB 211229C: Swift/BAT-GUANO detection likely outside the coded FOV
  59. GRB 211229A: Swift/BAT-GUANO arcminute localization
  60. GRB 211227A: Swift-XRT refined Analysis
  61. Konus-Wind detection of the intermediate flare from SGR 1935+2154
  62. GRB 211227A: BOOTES-2/TELMA optical upper limit
  63. GRB 211227A: Swift detection of a burst
  64. GRB 211226A: Swift/BAT-GUANO detection outside the coded FOV
  65. GRB 211226A: AGILE/MCAL detection of a burst
  66. GRB 211225A/MAXI J0827-071: MAXI/GSC detection
  67. Fermi trigger No 662084433: Global MASTER-Net observations report
  68. GRB 211223C: Swift-BAT refined analysis
  69. AGILE observations of a bright burst from SGR 1935+2154
  70. GRB 211223C: BOOTES-4/MET optical upper limit
  71. Fermi GBM Sub-Threshold Detection of GRB 211221A
  72. Fermi GBM Sub-Threshold Detection of GRB 211207A
  73. GRB 211221A: Swift-BAT refined analysis
  74. GRB 211223C: Swift detection of a burst
  75. GRB 211221A: NUTTelA-TAO / BSTI Early Optical Limits (Preliminary)
  76. GRB 211219B: AstroSat CZTI detection
  77. GRB 211219A: AstroSat CZTI detection
  78. GRB 211221A: BOOTES-4/MET optical upper limit
  79. GRB 211218A: MITSuME Akeno optical upper limits
  80. Swift GRB 211221A: Global MASTER-Net observations report
  81. GRB 211221A: Swift detection of a burst
  82. GRB 211219A: Swift/BAT-GUANO detection outside the coded FOV
  83. Fermi GRB 211219B: Global MASTER-Net observations report
  84. GRB 211216A: Fermi GBM observation
  85. GRB 211218A, MAXI J0909-041: MAXI/GSC detection
  86. MAXI GRB211218.04: Global MASTER-Net observations report
  87. GRB 211106A: XMM-Newton monitoring campaign detections
  88. Fermi-LAT Gamma-ray Observations of IceCube-211216B
  89. Fermi-LAT Gamma-ray Observations of IceCube-211216A
  90. GRB 211216A: Swift/BAT-GUANO detection outside the coded FOV
  91. GRB 211216A: GECAM detection
  92. Fermi GRB 211216A: Global MASTER-Net observations report
  93. GRB 211211A - Gemini K-band detection
  94. Chandra observation of GW170817 at ~1575 days since merger (all epochs)
  95. GRB 211211B: GECAM detection
  96. GRB 211211A: MITSuME Akeno optical observation
  97. GRB 211211A: Swift-XRT refined Analysis
  98. Fermi GRB 211211B: Global MASTER-Net observations report
  99. Fermi trigger No 660868196: Global MASTER-Net observations report
  100. IceCube-211208A: No significant detection in HAWC

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