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GCN Circulars

GCN Circulars are rapid astronomical bulletins submitted by and distributed to community members worldwide. They are used to share discoveries, observations, quantitative near-term predictions, requests for follow-up observations, or future observing plans related to high-energy, multi-messenger, and variable or transient astrophysical events. See the documentation for help with subscribing to or submitting Circulars.

"200205A/SWIFT J0840.7-3516" does not adhere to advanced search syntax. Please refer to the documentation and try again.
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').
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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"

19607 results found.

  1. IPN Triangulation of GRB 190117A (long)
  2. Trigger 884906: Swift detection of MAXI J1631-479
  3. Swift ToO Instructions Update
  4. Swift ToO Website Down
  5. GRB 190106A: Discovery Channel Telescope observations
  6. Konus-Wind observation of GRB 190114C
  7. The Swift-XRT WT mode spectrum of GRB190114C
  8. GRB190114C, Long follow up urged
  9. GRB 190114B: Swift-XRT refined Analysis
  10. GRB 190114C: Swift/UVOT Detection
  11. GRB 190114C: Swift-BAT refined analysis
  12. GRB 190114B, Swift-BAT refined analysis
  13. GRB 190114B: Swift/UVOT Upper Limits
  14. GRB 190114A: Swift/UVOT Observations
  15. GRB 190114C:Insight-HXMT/HE detection
  16. GRB 190114C: AGILE/MCAL detection
  17. GRB 190114C: X-shooter observations of a highly extinguished afterglow
  18. GRB 190114C: Fermi-LAT detection
  19. GRB 190114C: Fermi GBM detection
  20. GRB 190114C: Swift-XRT refined Analysis
  21. GRB 190114C: Enhanced Swift-XRT position
  22. GRB 190114C: GROND detection of the afterglow
  23. MAGIC detects the GRB 190114C in the TeV energy domain
  24. GRB 190114B: BOOTES-4/MET optical afterglow detection
  25. GRB 190114C: MASTER 4-polarizations filters OT detection
  26. GRB 190114B: Enhanced Swift-XRT position
  27. GRB 190114C: MASTER afterglow Detection
  28. GRB 190114C: Swift detection of a very bright burst with a bright optical counterpart
  29. GRB 190114A: OSN Detection
  30. GRB 190114B: Swift detection of a burst
  31. GRB 190114A: Swift-BAT refined analysis
  32. GRB 190103B: Swift/UVOT Upper Limits
  33. GRB 190114A: Swift-XRT refined Analysis
  34. GRB 190114A: GROND detection of the afterglow
  35. GRB 190114A: Enhanced Swift-XRT position
  36. GRB 190114A: VLT/X-shooter redshift
  37. GRB 190114A: Prompt enhanced Swift-XRT position
  38. GRB 190114A: Possible UVOT Detection
  39. GRB 190114A: Swift detection of a burst
  40. GRB 190110A：Insight-HXMT/HE detection
  41. Konus-Wind observation of GRB 190110A
  42. GRB 190110A, Swift-BAT refined analysis
  43. Correction to GCN Circular 23663: GRB 190109A: Swift UVOT Upper Limits
  44. GRB 190110A: Fermi GBM detection
  45. GRB 190110A: Swift detection of a burst
  46. GRB 190109B: Fermi GBM observation
  47. GRB 190106A: OSN Afterglow Observations
  48. GRB 190109B: Swift/UVOT Upper Limits
  49. GRB 190109A: Swift/UVOT Upper Limits
  50. GRB 190109B: Swift-XRT refined Analysis
  51. GRB 190109B: Swift-BAT refined analysis
  52. GRB 190109A: Fermi GBM observation
  53. GRB 190109B: BOOTES-5/JGT optical observations
  54. GRB 190109B: Mondy optical upper limit
  55. GRB 190109A: Swift-BAT refined analysis
  56. GRB 190109B: Enhanced Swift-XRT position
  57. GRB 190109B: Swift-XRT observations
  58. GRB 190109B: Swift detection of a burst
  59. IPN triangulation of GRB 190103A (long)
  60. GRB 190109A: Swift-XRT refined Analysis
  61. GRB 190109A: Enhanced Swift-XRT position
  62. GRB 190109A: Prompt enhanced Swift-XRT position
  63. GRB 190109A: Swift detection of a burst
  64. IceCube-190104A: Swift-XRT observations
  65. Trigger 882561: Swift detection of MAXI J1631-479
  66. Konus-Wind observation of GRB 190106A
  67. GRB 190106A: Swift-XRT refined Analysis
  68. GRB 190103B: CALET Gamma-Ray Burst Monitor detection
  69. GRB 190106A: BOOTES-4/MET optical observations
  70. GRB 190106A: Swift/UVOT Detection
  71. GRB 190106A: Swift-BAT refined analysis
  72. GRB 190106A: Bassano Bresciano Observatory optical detection
  73. GRB 190106A: Enhanced Swift-XRT position
  74. GRB 190106A: MITSuME Akeno optical observation
  75. GRB 190106A: MASTER Amur OT detection
  76. GRB 190106A: Swift detection of a burst with an optical counterpart
  77. SWIFT GRB190106.57 Global MASTER-Net OT detection
  78. Konus-Wind observation of GRB 190103B
  79. GRB 190103B: Bassano Bresciano observatory upper limit
  80. GRB 190103B: Swift-BAT refined analysis
  81. GRB 190103B: Swift-XRT refined Analysis
  82. GRB 190103B: Enhanced Swift-XRT position
  83. GRB 190103B: Swift detection of a burst
  84. GRB 181231A: Fermi-LAT detection
  85. GRB 181225A: further Swift-XRT observations
  86. GRB 181228A: Global MASTER Net OT is the same REM IR transient
  87. Swift Trigger 880127 is not a GRB
  88. GRB 181228A: Swift-XRT refined Analysis
  89. GRB 181228A: Swift-BAT refined analysis
  90. GRB 181222B: Swift follow-up observations of MASTER optical transient J204928.79+245744.0
  91. GRB 181228A: Swift/UVOT Upper Limits
  92. GRB 181228A: Fermi GBM observation
  93. IPN Triangulation of GRB 181227A (long)
  94. GRB 181228A: Global MASTER Net OT detection
  95. GRB 181228A: Enhanced Swift-XRT position
  96. GRB 181228A: KAIT Optical Upper Limit
  97. GRB 181228A: Swift detection of a burst
  98. GRB 181222B: Swift ToO observations
  99. GRB 181225A: Swift observations and X-ray candidate afterglow
  100. GRB 181225A: Swift ToO observations

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