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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"

12126 results found.

  1. GRB 210912A: LBT optical observations
  2. GRB 210919A: AbAO optical upper limit
  3. Swift GRB 210919A: Global MASTER-Net observations report
  4. Swift trigger 1073821: detection of IGR J16418-4532
  5. GECAM observations of bursts from SGR J1935+2154 (2021-09-13T01 to 2021-09-15T14)
  6. Konus-Wind observation of the recent SGR 1935+2154 activity
  7. GECAM observations of bursts from SGR J1935+2154 (2021-09-12T05 to 2021-09-13T01)
  8. AGILE observations of two bright bursts from SGR 1935+2154
  9. GRB 210912A: CAHA 2.2m Detection
  10. GRB 210912A: Swift-XRT refined Analysis
  11. Fermi GBM observation of another bright burst in the direction of SGR 1935+2154
  12. Swift GRB 210912A: Global MASTER-Net observations report
  13. GECAM observations of bursts from SGR J1935+2154 (2021-09-11T07 to 2021-09-12T08)
  14. GRB 210912A: Swift detection of a burst
  15. Fermi trigger No 653084584: Global MASTER-Net observations report
  16. Fermi trigger No 653083551: Global MASTER-Net observations report
  17. Fermi trigger No 653072474: Global MASTER-Net observations report
  18. Fermi trigger No 653054042: Global MASTER-Net observations report
  19. Fermi trigger No 653049776: Global MASTER-Net observations report
  20. Fermi trigger No 653022153: Global MASTER-Net observations report
  21. Swift GRB210910.42: Global MASTER-Net observations report
  22. Fermi GBM observation of a bright flare in the direction of SGR 1935+2154
  23. Konus-Wind detection of the second intermediate flare from SGR 1935+2154
  24. IPN triangulation of a bright burst from SGR 1935+2154
  25. Fermi trigger No 652981861: Global MASTER-Net observations report
  26. GECAM observations of a series of bursts from SGR J1935+2154
  27. Swift detection of a burst from SGR Swift J1555.2-5402
  28. Fermi trigger No 652934203: Global MASTER-Net observations report
  29. GECAM observation of a burst from SGR J1935+2154
  30. GECAM observation of a burst from SGR J1935+2154
  31. Fermi trigger No 652927551: Global MASTER-Net observations report
  32. GRB 210619B: Maidanak and Assy optical observations, broken power law parametrization
  33. Fermi trigger No 652911693: Global MASTER-Net observations report
  34. Fermi trigger No 652906639: Global MASTER-Net observations report
  35. Fermi GRB 210909A: Global MASTER-Net observations report
  36. GECAM observation of a burst from SGR J1555.2-5402
  37. GRB 210905A: ATCA detection
  38. GRB 210905A: ALMA detection
  39. GRB 210905A: AstroSat CZTI detection
  40. Fermi GBM trigger 652585475 / 210906073 is not a GRB
  41. Fermi trigger No 652585475: Global MASTER-Net observations report
  42. GRB 210905A: Swift-XRT refined Analysis
  43. GRB 210610A: Maidanak and AbAO optical observations
  44. GRB 210827B: GECAM detection
  45. Fermi GRB 210904A: Global MASTER-Net observations report
  46. GRB 210904A: Fermi GBM Final Real-time Localization
  47. GRB 210901A: GROND observations
  48. Fermi GBM observation of a burst from SGR J1555.2-5402
  49. Integral GRB210829.14: Global MASTER-Net observations report
  50. GRB 210826A: AstroSat CZTI detection
  51. Fermi GRB 210827A: Global MASTER-Net observations report
  52. Fermi GRB 210827B: Global MASTER-Net observations report
  53. POLAR detection of a SGR-like burst
  54. GRB 210826A: Fermi-LAT detection
  55. GRB 210824A: MITSuME Akeno optical upper limits
  56. GRB 210822A: TSHAO continued optical observation
  57. GRB 210822A: VLA detection
  58. GRB 210822A: TSHAO optical observation
  59. Swift detection of an outburst from SGR Swift J1555.2-5402
  60. GRB 210824A: Swift-XRT refined Analysis
  61. GRB 210824A: Swift detection of a burst
  62. GRB 210822A: GECAM refined analysis
  63. Konus-Wind detection of GRB 210822A
  64. GRB 210822A: AstroSat CZTI detection
  65. GRB 210822A: Swift-BAT refined analysis
  66. GRB 210820A: NUTTelA-TAO / BSTI Early Optical Limits (Preliminary)
  67. GRB 210822A: Fermi-LAT detection
  68. Fermi GRB 210822B: Global MASTER-Net observations report
  69. GRB 210822A: KAIT Optical Afterglow Confirmation
  70. GRB 210820A: LCO Optical Upper Limit
  71. GRB 210820A: Nanshan/NEXT optical upper limit
  72. GRB 210820A: Swift-XRT refined Analysis
  73. Swift GRB 210820A: Global MASTER-Net observations report
  74. GRB 210820B: Fermi GBM Final Localization
  75. Fermi trigger No 651110719: Global MASTER-Net observations report
  76. Konus-Wind detection of GRB 210818A
  77. GRB 210818A: AstroSat CZTI detection
  78. GRB 210818A: AGILE detection
  79. Fermi trigger No 650687034: Global MASTER-Net observations report
  80. Fermi-LAT Gamma-ray Observations of IceCube-210811A
  81. GRB 210807A: continued Assy, AbAO and Mondy observations
  82. SGR 1935+2154: SPI INTEGRAL observations on 2021 August 5
  83. GRB 210730A: Tautenburg observations
  84. GRB 210807A: Tautenburg observations
  85. IceCube Alert 210811.09: Global MASTER-Net observations report
  86. GRB 210807C: Swift-BAT refined analysis
  87. GRB 210610B: Assy optical observations
  88. Fermi GRB 210807C: Global MASTER-Net observations report
  89. Swift GRB210807.96: Global MASTER-Net observations report
  90. GRB 210807C: Swift detection of a burst
  91. Fermi GRB 210807B: Global MASTER-Net observations report
  92. Swift GRB210807.78: Global MASTER-Net observations report
  93. GRB 210807A: BOOTES-5/JGT optical afterglow detection
  94. GRB 210807A: Swift detection of a burst with an optical counterpart
  95. Konus-Wind detection of a burst from SGR 1935+2154 on 2021 August 5
  96. IPN Triangulation of a bright burst from SGR 1935+2154
  97. Fermi trigger No 649814537: Global MASTER-Net observations report
  98. GRB 210802A: BOOTES-2/TELMA optical upper limit
  99. GRB 210802A: Fermi GBM detection
  100. GRB 210802A: Fermi-LAT detection

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