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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"

19596 results found.

  1. GRB 170728A: Enhanced Swift-XRT position
  2. GRB 170728A: Swift detection of a burst
  3. GRB 170724A, Swift-BAT refined analysis
  4. GRB 170724A: Swift detection of a burst
  5. Trigger 763539 from Swift is probably not astrophysical
  6. GRB 170710B: Further Swift-XRT observations
  7. Correction to GCN Circular 21351: GRB 170714A: Swift/UVOT Observations
  8. GRB 170714A: Swift/UVOT Observations
  9. GRB 170714A, Swift-BAT refined analysis
  10. GRB 170714A: Swift-XRT refined Analysis
  11. GRB 170714A: Enhanced Swift-XRT position
  12. GRB 170714A: Swift detection of a burst
  13. GRB 170702A CALET Gamma-Ray Burst Monitor detection
  14. GRB 170711A: ISON/Terskol and AbAO optical observations
  15. GRB 170711A: Swift-BAT refined analysis
  16. GRB 170711A: Swift/UVOT Upper Limits
  17. GRB 170711A: RATIR Optical and NIR Observations
  18. GRB 170705A: AstroSat CZTI detection
  19. GRB 170711A: Swift-XRT refined Analysis
  20. GRB 170711A: Fermi GBM observation
  21. GRB 170711A: Enhanced Swift-XRT position
  22. GRB 170711A: Prompt enhanced Swift-XRT position
  23. GRB 170711A: Swift detection of a burst
  24. GRB 170705A: TShAO optical observations
  25. GRB 170710B: Fermi GBM observation
  26. GRB 170710B: Swift-XRT and UVOT observations
  27. GRB 170710B: Swift ToO observations
  28. GRB 170710B: Swift detection of a burst
  29. GRB170710A: Swift/UVOT detection
  30. GRB 170710A: Swift-BAT refined analysis
  31. GRB 170710A: Swift-XRT refined Analysis
  32. GRB 170710A: Gemini-S candidate counterpart
  33. GRB 170710A: Enhanced Swift-XRT position
  34. GRB 170710A: Prompt enhanced Swift-XRT position
  35. GRB 170710A: Swift detection of a burst
  36. Correction to GCN Circular 21305: Trigger 760835: Swift misidentification of GRS1716-249
  37. Trigger 760835: Swift misidentification of GRS1716-249
  38. GRB 170705A: Further RATIR Optical and NIR Observations and Steepening of Fading
  39. GRB 170705A: KAIT Optical Observations
  40. GRB 170705A: Insight-HXMT observation
  41. GRB 170705A: ISON/Terskol optical observations
  42. Konus-Wind observation of GRB 170705A
  43. GRB 170705A: Fermi GBM observation
  44. GRB 170705A: Swift-BAT refined analysis
  45. GRB 170705A: Swift/UVOT Detection
  46. GRB 170705A: RATIR Optical and NIR Observations
  47. GRB 170705A: Swift-XRT refined Analysis
  48. GRB 170705A: MASTER-OAFA early OT observations
  49. GRB 170705A: Enhanced Swift-XRT position
  50. GRB 170705A: Swift detection of a burst with an optical counterpart
  51. GRB 170629A: Swift-XRT refined Analysis
  52. GRB 170629A: Swift-BAT refined analysis
  53. GRB 170629A: Enhanced Swift-XRT position
  54. GRB 170629A: Fermi GBM observation
  55. GRB 170629A: Swift detection of a burst
  56. IPN Triangulation of GRB 170626B
  57. Konus-Wind observation of GRB 170626A
  58. GRB 170626A: TShAO optical observations
  59. GRB 170607A: 15 GHz upper limits from AMI
  60. GRB 170626A: Insight-HXMT observation
  61. GRB 170626A: MASTER-Tunka OT detection.
  62. GRB 170626A: Swift-BAT refined analysis
  63. GRB 170626A: Swift-XRT refined Analysis
  64. GRB 170626A: Fermi GBM observation
  65. GRB 170626A: Swift detection of a burst
  66. Swift trigger 758168 is probably not an astrophysical source
  67. Swift Trigger 758005 is Probably Not an Astrophysical Source
  68. Swift Trigger 756953: false identification by MASTER GCN 21250
  69. Swift Trigger 756953 is probably not an astrophysical source
  70. GRB170612.87 MASTER-Net OT detection
  71. LIGO/Virgo G288732: Kiso/KWFC optical imaging of the possible Fermi/LAT counterpart
  72. Konus-Wind observation of GRB 170604A
  73. LIGO/Virgo G288732: UKIRT near-IR imaging of the Fermi/LAT candidate
  74. LIGO/Virgo G288732: LBT optical imaging of the Fermi/LAT candidate
  75. LIGO/Virgo G288732: GWFUNC/NOWT observations of the skymap and follow-up of the Fermi/LAT candidate
  76. LIGO/Virgo G288732: Swift/UVOT follow up of the possible LAT counterpart
  77. LIGO/Virgo G288732: Swift/BAT data search
  78. LIGO/Virgo G288732: Swift-XRT follow up of the putative LAT counterpart
  79. GRB 170607A: Swift-BAT refined analysis
  80. LIGO/Virgo G288732: Fermi-LAT detection of a weak candidate
  81. GRB 170607A: Swift/UVOT Detection
  82. GRB 170607A: MASTER-Tavrida early OT observations
  83. GRB 170607A: Fermi GBM observation
  84. GRB 170607A: Swift-XRT refined Analysis
  85. GRB 170607A: Enhanced Swift-XRT position
  86. GRB 170607A: Swift detection of a burst with a bright optical counterpart
  87. GRB 170526A: 15 GHz upper limits from AMI
  88. GRB 170524A: 15 GHz upper limits from AMI
  89. GRB 170519A: 15 GHz upper limits from AMI
  90. GRB 170604A: Swift/UVOT Observations
  91. GRB 170604A: RATIR Optical and NIR Observations
  92. GRB 170604A: AbAO optical observations
  93. Swift trigger 755873: Swift BAT and XRT refined analysis
  94. GRB 170522A: confirmation of the X-ray afterglow
  95. GROND observations of GRB170604A
  96. Swift Trigger 755873: MASTER Net optical observations
  97. GRB 170604A: Swift-XRT refined Analysis
  98. GRB 170604A: Enhanced Swift-XRT position
  99. GRB 170604A: Swift-BAT refined analysis
  100. Swift Trigger 755873: D50 optical limits

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