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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"

24596 results found.

  1. IceCube Alert 220115.51: Global MASTER-Net observations report
  2. Fermi trigger No 663927396: Global MASTER-Net observations report
  3. Fermi trigger No 663921434: Global MASTER-Net observations report
  4. GRB 210919A: LBT spectroscopic redshift of the host galaxy candidates
  5. GRB 220115A: Fermi GBM Final Real-time Localization
  6. IceCube-220115A - IceCube observation of a high-energy neutrino candidate track-like event
  7. GRB 220114A: Fermi GBM Final Localization
  8. GECAM observations of a series of bursts from SGR J1935+2154
  9. Fermi trigger No 663763320: Global MASTER-Net observations report
  10. Fermi trigger No 663710289: Global MASTER-Net observations report
  11. Fermi-GBM Observations of Recent Bursting Activity from SGR J1935+2154
  12. GECAM observations of a series of bursts from SGR J1935+2154
  13. Fermi trigger No 663669570: Global MASTER-Net observations report
  14. GRB 220111A: AstroSat CZTI detection
  15. Fermi trigger No 663658976: Global MASTER-Net observations report
  16. Fermi trigger No 663618072: Global MASTER-Net observations report
  17. Fermi GRB 220111A: Global MASTER-Net observations report
  18. GRB 220111A: BALROG localization (Fermi Trigger 663621714 / GRB 220111807)
  19. GRB 220111A: Fermi GBM Final Real-time Localization
  20. Konus-Wind detection of GRB 220101A
  21. Konus-Wind detection of GRB 220107B
  22. Konus-Wind detection of GRB 220107A
  23. GECAM observations of a series of bursts from SGR J1935+2154
  24. GRB 220101A: Additional Liverpool telescope photometry
  25. Fermi trigger No 663406755: Global MASTER-Net observations report
  26. GRB 220107A: 6m BTA spectroscopic redshift
  27. GRB 220108A: Swift/BAT-GUANO detection outside the coded FOV
  28. GRB 220107B: MITSuME Akeno optical upper limits
  29. GRB 220107A: Swift/UVOT Detection
  30. GRB 220107B: Fermi GBM observations
  31. GRB 220107A: MITSuME Akeno optical observation
  32. GRB 220107B: Swift-XRT afterglow detection
  33. GRB 220107B: Fermi-LAT detection
  34. GRB 220107A: AstroSat CZTI detection
  35. GRB 220107A: Fermi GBM observations
  36. Fermi trigger No 663274898: Global MASTER-Net observations report
  37. Fermi GRB 220107A: Global MASTER-Net observations report
  38. GRB 220107A: Swift/BAT-GUANO arcminute localization
  39. GRB 220107A: BALROG localization (Fermi Trigger 663259536 / GRB 220107615)
  40. GRB 220107A: Fermi GBM Final Real-time Localization
  41. GECAM observation of a burst from SGR J1555.2-5402
  42. GECAM detection of a short burst from SGR 1935+2154
  43. GRB 220101A: further TNG NIR observations
  44. GRB 220101A: continued 1.3m DFOT Optical Observations
  45. Fermi trigger No 663129379: Global MASTER-Net observations report
  46. GRB 220104A: Fermi GBM Observation
  47. GECAM observations of a series of bursts from SGR J1935+2154
  48. GRB 220101A: 3rd LCO Optical Observation
  49. GRB 220101A: iTelescope optical observations
  50. GRB 220101A: 1.3m DFOT observations
  51. GRB 220101A: LCO Continued Optical Observations
  52. GRB 220104A：GECAM detection
  53. Fermi GRB 220104A: Global MASTER-Net observations report
  54. GRB 220104A: Fermi GBM Final Real-time Localization
  55. GRB 211229B: Fermi GBM observation
  56. Fermi GRB 220103A: Global MASTER-Net observations report
  57. GRB 220103A: Fermi GBM Final Real-time Localization
  58. GRB 211229B: Swift/BAT-GUANO detection outside the coded FOV
  59. Alert from the HAWC Burst Monitor HAWC-220103A
  60. GRB 220101A: TNG NIR afterglow detection
  61. GRB 220101A: LCO Optical Observations
  62. GRB 220101A: Swift-BAT refined analysis
  63. Fermi trigger No 662768315: Global MASTER-Net observations report
  64. GRB 220101A: Fermi GBM Detection
  65. GRB 220101A: NOT redshift confirmation
  66. GRB 220101A: CAHA 2.2m/CAFOS detection
  67. GRB 220101A: Liverpool telescope imaging of a high-redshift afterglow
  68. GRB 220101A: THO optical observations
  69. GRB 220101A: Swift-XRT refined Analysis
  70. GRB 220101A: AGILE detection
  71. Swift GRB220101.22: Global MASTER-Net observations report
  72. GRB 220101A: Fermi-LAT detection
  73. IPN triangulation of GRB 211219A
  74. GRB 211231A: GECAM detection
  75. GRB 211229B: AGILE detection
  76. GRB 211231A: Fermi GBM Final Real-time Localization
  77. GRB 211229A: Swift-XRT and UVOT observations
  78. GRB 211227A: Deep early CAHA 2.2m/CAFOS observation
  79. GRB 211229A: Fermi GBM observation
  80. GRB 211229B: GECAM detection
  81. GRB 211229C: Swift/BAT-GUANO detection likely outside the coded FOV
  82. Fermi GRB 211229B: Global MASTER-Net observations report
  83. GRB 211229B: Fermi GBM Final Real-time Localization
  84. GRB 211229A: Swift/BAT-GUANO arcminute localization
  85. GRB 211229A: GECAM detection
  86. Fermi GRB 211229A: Global MASTER-Net observations report
  87. GRB 211229A: Fermi GBM Final Real-time Localization
  88. GRB 211227A: Swift-BAT refined analysis
  89. Konus-Wind detection of the intermediate flare from SGR 1935+2154
  90. GRB 211227A: A possible short GRB with extended emission at z = 0.228?
  91. GRB 211227A: LCO Optical Observations
  92. Swift GRB211227.98: Global MASTER-Net observations report
  93. GRB 211226A: Swift/BAT-GUANO detection outside the coded FOV
  94. GRB 211225B: Swift-BAT refined analysis
  95. Fermi trigger No 662216114: Global MASTER-Net observations report
  96. GRB 211225A: MITSuME Akeno optical upper limits
  97. Swift GRB 211225B: Global MASTER-Net observations report
  98. Fermi GRB 211225C: Global MASTER-Net observations report
  99. GRB 211225C: Fermi GBM Final Real-time Localization
  100. GRB 211225B: Swift detection of a burst

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