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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"

37719 results found.

  1. GRB 240118C: Swift/BAT-GUANO detection of a burst
  2. GRB 240118A: GRBAlpha detection
  3. GRB 240115A: Fermi GBM Observation
  4. GRB 240118C: Fermi GBM Final Localization
  5. GRB 240118D: AstroSat CZTI detection
  6. GRB 240117A: AstroSat CZTI detection
  7. GRB 240118A: Swift ToO observations
  8. GRB 240118A: AbAO optical upper limit
  9. Fermi GRB 240118B: Global MASTER-Net observations report
  10. GRB 240118A: NuSTAR Offline Analysis of the GRB
  11. GRB 240117A: Glowbug gamma-ray detection
  12. GRB 240118A: Swift/BAT-GUANO detection of a burst outside the coded FOV
  13. Konus-Wind detection of GRB 240118A
  14. GRB 240118C: BALROG localization (Fermi Trigger 727291408 / GRB 240118725)
  15. GRB 240118A: NuSTAR Detection of a Long GRB
  16. GRB 240118A: Fermi GBM Observation
  17. GRB 240118B: Fermi GBM Final Real-time Localization
  18. GRB 240118A: Fermi-LAT detection
  19. GRID detection of GRB 231230A
  20. GRB 240118A: Fermi GBM Final Real-time Localization
  21. GRB 240115A: Swift/BAT-GUANO detection of a short burst
  22. IPN triangulation of GRB 240112A (long)
  23. GRB 240115B: AstroSat CZTI detection
  24. LIGO/Virgo/KAGRA S240109a: Upper limits from Swift/BAT-GUANO
  25. GRB 240115B: Fermi GBM Detection
  26. GRB 240112D: Glowbug gamma-ray detection
  27. GRB 240112C: Glowbug gamma-ray detection
  28. GRB 240112C: VZLUSAT-2 detection
  29. GRB 240107A: VZLUSAT-2 detection
  30. Fermi GRB 240115B: Global MASTER-Net observations report
  31. GRB 240115B: A long GRB detected by INTEGRAL
  32. GRB 240115B: Fermi GBM Final Real-time Localization
  33. Konus-Wind detection of GRB 240112C
  34. Fermi GRB 240115A: Global MASTER-Net observations report
  35. GRB 240115A: Fermi GBM Final Real-time Localization
  36. GRB 240112C: GRBAlpha detection
  37. GRB 240114A: MAXI/GSC detection
  38. GRB 240112C: Swift/UVOT Detection
  39. GRB 240112C: Fermi GBM Detection
  40. Fermi trigger No 726773850: Global MASTER-Net observations report
  41. GRB 240112C: Swift-XRT refined Analysis
  42. GRB 240112C: SAO RAS optical observations
  43. GRB 240112E: Fermi GBM Final Localization
  44. Fermi GRB 240112D: Global MASTER-Net observations report
  45. GRB 240112D: Fermi GBM Final Real-time Localization
  46. Fermi trigger No 726774492: Global MASTER-Net observations report
  47. Swift GRB 240112C: Global MASTER-Net observations report
  48. Fermi GRB 240112B: Global MASTER-Net observations report
  49. GRB 240109A: Swift-BAT refined analysis
  50. GRB 240112C: Swift detection of a burst with an optical counterpart
  51. GRB 240112B: Fermi GBM Final Real-time Localization
  52. GRB 240112A: GECAM detection of a burst
  53. GRB 240109A: Fermi GBM Observation
  54. GRB 240110A: AstroSat CZTI detection
  55. Fermi-LAT detection of increased gamma-ray activity of blazar PKS 0446+11, located inside the IceCube-240105A error region
  56. GRB 240108A: Glowbug gamma-ray detection
  57. GRB 231214A: ATCA Radio Upper Limits
  58. GRB 240106B: Glowbug gamma-ray detection
  59. GRB 240106A: Glowbug gamma-ray detection
  60. GRB 240109B: Fermi GBM Final Real-time Localization
  61. Konus-Wind detection of GRB 240101C
  62. GRB 231215A: radio detection with the VLA
  63. GRB 230818A: further radio observations with the VLA
  64. GRB 230812B: further radio observations with the VLA
  65. GRB 240107A: AstroSat CZTI detection
  66. GRB 240109A: Swift detection of a short burst
  67. LIGO/Virgo/KAGRA S240104bl: Upper limits from Swift/BAT-GUANO
  68. Update of IceCube-240105A - Corrected errors
  69. GRB 240106A: GRBAlpha detection
  70. GRB 240107A: MAXI/GSC detection
  71. Fermi trigger No 726347794: Global MASTER-Net observations report
  72. GRB 240106B: Fermi GBM Final Real-time Localization
  73. Fermi trigger No 726194053: Global MASTER-Net observations report
  74. GRB 240106A: Fermi GBM Final Real-time Localization
  75. IPN triangulation of GRB 240101C (short)
  76. GRB GRB240101C: Fermi GBM observation
  77. GRB 240101A: 1.3m DFOT optical observations
  78. IceCube-240105A - IceCube observation of a high-energy neutrino candidate track-like event
  79. GRB 240102A: 1.3m DFOT optical upper limit
  80. GRB 240101B: 1.3m DFOT optical upper limit
  81. GRB 240101C: Swift/BAT-GUANO detection of a short burst
  82. GRB 240102C: AstroSat CZTI detection
  83. GRB 240101C: AstroSat CZTI detection
  84. GRB 231220A: Swift-UVOT upper limit
  85. GRB 240102A: Swift-BAT refined analysis
  86. GRB 240102A: Swift/UVOT Upper Limits
  87. GRB 231230A: Swift-BAT refined analysis
  88. GRB 240101A: Swift-BAT refined analysis
  89. GRB 240101B: Swift-BAT refined analysis
  90. GRB 240102A: Enhanced Swift-XRT position
  91. GRB 240101B: Swift-XRT refined Analysis
  92. GRB 240102A: Swift-XRT refined Analysis
  93. GRB 240102B (Fermi GBM trigger 725926335/240102925) is not a GRB
  94. GRB 240102A: LCOGT Optical Upper Limits
  95. Fermi trigger No 725857207: Global MASTER-Net observations report
  96. GRB240102A: BOOTES-6/DPRT optical upper limit
  97. GRB 240102B: Fermi GBM Final Real-time Localization
  98. GRB 240101B: MarSEC Observatory, Vicenza, Italy, UPPER LIMIT
  99. GRB 240102A: Swift detection of a burst
  100. GRB 240101A: Terskol Zeiss-2000 optical observations

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