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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"

12189 results found.

  1. Fermi trigger No 627557935: Global MASTER-Net observations report
  2. Baksan Neutrino Observatory Alert 201120.43: Global MASTER-Net observations report
  3. IceCube Alert 201120.41: Global MASTER-Net observations report
  4. IceCube-201120A: IceCube observation of a high-energy neutrino candidate event
  5. ZTF20acozryr/AT2020yxz (GRB 201103B): SAO RAS optical observations
  6. IceCube 201114A: Swift followup of Fermi J0703.5+0505
  7. Konus-Wind detection of GRB 201116A
  8. Fermi-LAT Gamma-ray Observations of IceCube-201114A
  9. GRB 201116A: Swift-XRT afterglow detection
  10. Fermi trigger No 627198169: Global MASTER-Net observations report
  11. GRB 201116A: Fermi-LAT detection
  12. Fermi-LAT Gamma-ray Observations of IceCube-201115A
  13. Swift XRT observations of the Fermi-LAT source 4FGL J0658.6+0636, positionally consistent with the IceCube high-energy neutrino alert
  14. IceCube GCN alert 134701_49508272.amon retraction
  15. IceCube-201115A: IceCube observation of a high-energy neutrino candidate event
  16. IceCube-201114A - IceCube observation of a high-energy neutrino candidate event
  17. Fermi-LAT Gamma-ray Observations of NuEm-201107A
  18. Konus-Wind observation of GRB 201109A
  19. Swift Trigger 1005428: Detection of SGR 1830-0645
  20. ZTF20acozryr (GRB 201103B): GROWTH-India Telescope optical observations
  21. Konus-Wind observation of GRB 201103B
  22. Konus-Wind detection of GRB 201105A
  23. ZTF20acozryr/AT2020yxz (GRB 201103B): Assy optical observations
  24. GRB 201104B: Swift-XRT refined Analysis
  25. ZTF20acozryr/AT2020yxz: Zwicky Transient Facility discovery of a fast optical transient with no associated GRB
  26. Swift Trigger 1004219: Detection of SGR 1830-0645
  27. GRB 201103B: AGILE detection
  28. GRB 201104A: AGILE/MCAL detection
  29. GRB 201104A: Fermi-LAT detection
  30. GRB 201104B: Swift/UVOT Detection
  31. Fermi GRB 201104A: Global MASTER-Net observations report
  32. Fermi GRB 201103A: Global MASTER-Net observations report
  33. Swift GRB 201031A: Global MASTER-Net observations report
  34. Fermi GRB 201031B: Global MASTER-Net observations report
  35. IceCube 201021A: Swift follow-up of Fermi J1725.5+1312
  36. Swift GRB 201029A: Global MASTER-Net observations report
  37. GRB 201029A: Fermi GBM detection
  38. GRB 201029A: Swift-XRT refined Analysis
  39. GRB 201029A: BOOTES-1 optical upper limit
  40. GRB 201029A: FRAM-ORM optical limit
  41. Fermi trigger No 625695596: Global MASTER-Net observations report
  42. GRB 201029A: Swift detection of a burst
  43. GRB 201027A: Swift-BAT refined analysis
  44. GRB 201027A: Swift-XRT refined Analysis
  45. Baksan Neutrino Observatory Alert 201027.41: Global MASTER-Net observations report
  46. GRB 201026A: FRAM-ORM optical detection limit
  47. GRB 201027A: Swift detection of a burst
  48. GRB201024A: rebrightening after initial steep decline
  49. GRB 201024A: Swift-XRT refined Analysis
  50. GRB 201024A: FRAM-ORM afterglow detection
  51. GRB 201024A: MASTER correction to GCN 28760
  52. GRB 201024A: Swift detection of a burst with an optical afterglow
  53. Swift GRB201024A: Global MASTER-Net OT detection
  54. Swift GRB201024.12: Global MASTER-Net observations report
  55. IceCube-201021A: No significant detection in HAWC
  56. GRB 201021C: Swift-BAT refined analysis
  57. GRB 201021C: Swift-XRT refined Analysis
  58. Baksan Neutrino Observatory Alert 201022.66: Global MASTER-Net observations report
  59. Fermi-LAT Gamma-ray Observations of IceCube-201021A and detection of a new gamma-ray source, Fermi J1725.5+1312
  60. GRB 201021C: Fermi GBM detection
  61. IceCube-201021A: Upper limits from a search for additional neutrino events in IceCube
  62. GRB 201021C: Swift/UVOT Detection
  63. Konus-Wind detection of GRB 201020A
  64. GRB 201020A: VIRT optical observations
  65. GRB 201021C: MASTER optical synchronously observation
  66. Swift GRB201021.85: Global MASTER-Net observations report
  67. GRB 201021C: Swift detection of a burst with an optical counterpart
  68. MAXI GRB201021.68: Global MASTER-Net observations report
  69. GRB 201021B MAXI/GSC detection
  70. GRB 201020B: Mondy optical observations
  71. Swift-XRT observations of IceCube 201021A
  72. Konus-Wind detection of GRB 201020B
  73. GRB 201015A: SAO RAS optical observations
  74. GRB 201020A: Redshift from GTC/OSIRIS
  75. GRB 201020B: Fermi-LAT detection
  76. IceCube-201021A: IceCube observation of a high-energy neutrino candidate event
  77. GRB 201020B: AGILE detection
  78. GRB 201020A: DOAO optical afterglow observations
  79. GRB 201020B: Fermi GBM detection
  80. GRB 201020A: CrAO/ZTSH optical observations
  81. GRB 201020A: Swift-XRT refined Analysis
  82. GRB 201020A: Fermi GBM observation
  83. Fermi GRB 201020B: Global MASTER-Net observations report
  84. GRB 201020A: Assy optical observations
  85. GRB 201020B: Fermi GBM Final Real-time Localization
  86. GRB 201020A: Nanshan/NEXT optical observations
  87. Swift GRB 201020A: Global MASTER-Net observations report
  88. GRB 201014A: SAO RAS optical observations
  89. GRB 201020A: MITSuME Akeno optical observation
  90. GRB 201020A: Swift detection of a burst with an optical counterpart.
  91. GRB 201017A iTelescope observation
  92. GRB 201017A: SAO RAS optical observations
  93. GRB 201017A: Swift-BAT refined analysis
  94. GRB 201017A: Assy and Mondy optical observations, possible afterglow detection
  95. GRB 201015A: Assy and Mondy optical observations
  96. GRB 201015A: FRAM-ORM afterglow detection
  97. Konus-Wind observation of GRB 201013A
  98. GRB 201014A: Swift-XRT refined Analysis
  99. Swift GRB 201015A: Global MASTER-Net observations report
  100. Fermi-LAT Gamma-ray Observations of IceCube-201014A

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