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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"

11779 results found.

  1. Fermi trigger No 714809315: Global MASTER-Net observations report
  2. Fermi GRB 230827A: Global MASTER-Net observations report
  3. Swift J1727.8-1613 (GRB 230824A): Leavitt Observatory optical observations
  4. GRB 230826A: Mondy optical observations
  5. Swift GRB230826.81: Global MASTER-Net observations report
  6. LIGO/Virgo/KAGRA S230825k: Upper limits from Swift/BAT-GUANO
  7. Swift J1727.8-1613 (GRB 230824A): Skynet Optical Observations
  8. Trigger 1187207: Swift detection of Swift J1727.8-1613 (AKA GRB 230824A)
  9. Trigger 1187203: Swift detection of Swift J1727.8-1613 (AKA GRB 230824A)
  10. Trigger 1187142: Swift detection of Swift J1727.8-1613 (AKA GRB 230824A)
  11. MAXI/GSC detection of Swift J1727.8-1613 (GRB 230824A)
  12. IBAS trigger 10375 is not a GRB
  13. Integral GRB230824.72: Global MASTER-Net observations report
  14. GRB 230824B: AstroSat CZTI detection
  15. GRB 230824A: Swift detection of a burst
  16. LIGO/Virgo/KAGRA S230822bm: Upper limits from Swift/BAT-GUANO
  17. GRB 230818B: AstroSat CZTI detection
  18. GRB 230812B: Assy optical observations, possible SN rise
  19. GRB 230812B: SAO RAS RC-500 and Zeiss-1000 observations
  20. Konus-Wind detection of GRB 230818A
  21. GRB 230820A: AstroSat CZTI detection
  22. LIGO/Virgo/KAGRA S230820bq: Identification of a GW compact binary merger candidate
  23. Swift GRB230820.82: Global MASTER-Net observations report
  24. Swift Triggers 1186280 and 1186291 are not GRBs
  25. GRB 230818A: SAO RAS 6-m telescope spectroscopy
  26. GRB 230818A: AstroSat CZTI detection
  27. Fermi GRB 230818A: Global MASTER-Net observations report
  28. Fermi trigger No 713974668: Global MASTER-Net observations report
  29. Swift GRB230818.98: Global MASTER-Net observations report
  30. GRB 230812B: SAO RAS observations, possible re-brightening
  31. GRB 230817A: AstroSat CZTI detection
  32. GRB 230815A: VLT/HAWK-I near-infrared afterglow detection
  33. GRB 230812B: SAO RAS optical observations
  34. GRB 230816A: Tautenburg observations
  35. GRB 230816A: AKO Optical Observations
  36. GRB 230816A: TShAO and Assy optical observations
  37. Swift GRB230816.80: Global MASTER-Net observations report
  38. GRB 230816A: Nanshan/HMT optical afterglow detection
  39. GRB 230815B: GECAM-B and GECAM-C detection of a burst
  40. GRB 230815B: AstroSat CZTI detection
  41. GRB 230812B: continued SAO RAS optical observation
  42. GRB 230812B: Iota Scorpii Observatory, La Spezia, Italy
  43. GRB 230812B: further SAO RAS optical observations
  44. GRB 230812B: GIT optical follow-up
  45. GRB 230812B: Leavitt Observatory optical observations
  46. GRB 230812B : optical observations from Observatoire de Haute-Provence
  47. GRB 230812B: Montarrenti Observatory optical observations
  48. GRB 230812B: SAO RAS optical observations
  49. Konus-Wind detection of GRB 230812B
  50. GRB 230812B: GECAM-C observation of a very bright burst
  51. GRB 230812B: Swift-XRT afterglow detection
  52. GRB 230812B: Improved Swift/XRT localization
  53. GRB 230812B: Fermi-LAT detection
  54. Fermi GRB 230812B: Global MASTER-Net observations report
  55. GRB 230812B: Fermi GBM detection of an extremely bright GRB
  56. GRB 230805B: Iota Scorpii Observatory, La Spezia, Italy upper limit
  57. GRB 230805B: AstroSat CZTI detection
  58. Fermi trigger No 713136868: Global MASTER-Net observations report
  59. The Fermi GBM Trigger 713134237 / 230807868 is not associated with LIGO/Virgo/KAGRA S230807f.
  60. LIGO/Virgo/KAGRA S230807f: Identification of a GW compact binary merger candidate
  61. LIGO/Virgo/KAGRA S230805x: Upper limits from Swift/BAT-GUANO
  62. Konus-Wind detection of GRB 230803A
  63. GRB 230805B : OHP/T193 optical upper limit
  64. LIGO/Virgo/KAGRA S230806ak: Identification of a GW compact binary merger candidate
  65. GRB 230805B: Bassano Bresciano observatory upper limit
  66. GRB 230805B: BOOTES-6/DPRT optical upper limit and 1.5m OSN detection
  67. GRB 230805B: Swift-XRT refined Analysis
  68. GRB 230805B: Swift detection of a burst
  69. GRB 230802B: AstroSat CZTI detection
  70. IPN triangulation of GRB 230803A
  71. GRB 230803A: AstroSat CZTI detection
  72. LIGO/Virgo/KAGRA S230802aq: AstroSat CZTI non-detection and upper limits
  73. Fermi trigger No 712713532: Global MASTER-Net observations report
  74. LIGO/Virgo/KAGRA S230802aq: Coverage and upper limits from MAXI/GSC observations
  75. LIGO/Virgo/KAGRA S230731an: Upper limits from Swift/BAT-GUANO
  76. LIGO/Virgo/KAGRA S230731an: AstroSat CZTI non-detection and upper limits
  77. LIGO/Virgo/KAGRA S230731an: Coverage and upper limits from MAXI/GSC observations
  78. Fermi-LAT gamma-ray observations of IceCube-230727A
  79. GRB 230728A: Fermi GBM Observation
  80. GRB 230728A: Swift-XRT refined Analysis
  81. GRB 230727A: AstroSat CZTI detection
  82. GRB 230728A: Swift detection of a burst
  83. Fermi-LAT gamma-ray observations of IceCube-230725A
  84. Fermi-LAT gamma-ray observations of IceCube-230724A
  85. Konus-Wind detection of GRB 230723A
  86. GRB 230723B: MITSuME Akeno optical afterglow candidate detection
  87. Integral GRB230725.99: Global MASTER-Net observations report
  88. IceCube Alert 230725.90: Global MASTER-Net observations report
  89. GRB 230723B: Osservatorio Astronomico Nastro Verde upper limit
  90. GRB 230723B: Optical afterglow candidate from CAHA
  91. GRB 230723B: Swift-XRT refined Analysis
  92. GRB 230723B: non-detections from Observatoire de Haute-Provence
  93. IceCube Alert 230724.08: Global MASTER-Net observations report
  94. Fermi trigger No 711853834: Global MASTER-Net observations report
  95. GRB 230723B: Optical limit from CAHA
  96. Swift-XRT position for GRB 230723B
  97. Swift GRB230720.30: Global MASTER-Net observations report
  98. IceCube-230707A : MAXI upper limit and NICER follow-up observation of Swift J1753.5-0127
  99. GRB 230709C: Swift/BAT-GUANO detection of a short burst outside the coded FOV
  100. IceCube-230708A: Upper limits from Swift/BAT-GUANO

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