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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. GRB 170604A: Swift/UVOT Observations
  2. GRB 170604A: RATIR Optical and NIR Observations
  3. GRB 170604A: AbAO optical observations
  4. Swift trigger 755873: Swift BAT and XRT refined analysis
  5. GRB 170522A: confirmation of the X-ray afterglow
  6. GROND observations of GRB170604A
  7. Swift Trigger 755873: MASTER Net optical observations
  8. GRB 170604A: Swift-XRT refined Analysis
  9. GRB 170604A: Enhanced Swift-XRT position
  10. GRB 170604A: Swift-BAT refined analysis
  11. Swift Trigger 755873: D50 optical limits
  12. Swift Trigger 755873: a possible GRB
  13. GRB 170604A: Swift detection of a burst
  14. Trigger 755848: Swift spurious trigger on Cen X-3
  15. GRB 170531B: Swift/UVOT Detection
  16. GRB 170531B: Swift-BAT refined analysis
  17. GRB 170531A: Swift/UVOT Upper Limits
  18. GRB 170531B: LCO observations
  19. GRB 170531B: Swift-XRT refined Analysis
  20. GRB 170531A: MASTER Net job
  21. GRB 170531A: Swift-XRT refined Analysis
  22. GRB 170531B: MASTER Net optical counterpart refind position and magnitude
  23. GROND observations of GRB 170531B
  24. GRB 170531B: Redshift from GTC/OSIRIS
  25. GRB 170531B: Enhanced Swift-XRT position
  26. GRB 170531A: Swift/UVOT Observations
  27. GRB 170531B: Swift detection of a burst
  28. GRB 170531A: Swift detection of a burst
  29. GRB 170524B: Swift-UVOT/XRT Confirmation of Afterglow
  30. IPN Triangulation of GRB 170529A (long)
  31. GRB 170526A, Swift-BAT refined analysis
  32. GRB 170526A: Swift/UVOT Upper Limits
  33. GRB 170526A: Swift-XRT refined Analysis
  34. GRB 170524A: RATIR Optical and NIR Observations
  35. GRB 170526A: Enhanced Swift-XRT position
  36. GRB 170524B: Swift-XRT observations
  37. GRB 170526A: Swift detection of a burst
  38. Konus-Wind observation of GRB 170524B
  39. GRB 170524B: MASTER-OAFA observations
  40. GRB 170524A: TSHAO and CrAO optical observations
  41. GRB 170524B: Swift ToO observations
  42. GRB 170524A: Swift-BAT refined analysis
  43. GRB 170524B: Swift detection of a burst
  44. GRB 170524A: Swift/UVOT Upper Limits
  45. GRB 170524A: Swift-XRT refined Analysis
  46. IPN Triangulation of GRB 170522A
  47. GRB 170524A: Enhanced Swift-XRT position
  48. GRB 170524A: Swift detection of a burst (or possible new SGR)
  49. GRB 170522A: LCO McDonald observations
  50. GRB 170522A: Swift-XRT observations
  51. GRB 170522A: Tiled Swift observations
  52. GRB 170522A: Fermi-LAT detection
  53. GRB170519A, Swift-UVOT Detection
  54. GRB 170519A: BOOTES-5/JGT early optical detection
  55. GRB 170519A: KAIT Optical Observations
  56. GRB 170519A: Swift-XRT refined Analysis
  57. GRB 170519A: Swift-BAT refined analysis
  58. GRB 170510A: LCO Siding Springs early observations
  59. GRB 170519A: Enhanced Swift-XRT position
  60. GRB 170519A: Swift detection of a burst with an optical counterpart
  61. GRB 170510A: Swift-XRT afterglow detection
  62. GRB 170516A: Swift-BAT refined analysis
  63. GRB 170516A: Swift-XRT refined Analysis
  64. AXP CXOU J164710.2-455216: Fermi GBM observation
  65. GRB 170516A: Swift/UVOT Upper Limits
  66. GRB 170516A: Enhanced Swift-XRT position
  67. GRB 170516A: Swift detection of a burst
  68. Swift Trigger AXP CXOU J164710.2-455216: MASTER-OAFA observations
  69. Swift Trigger on AXP CXOU J164710.2-455216
  70. GRB 170510A: LCO possible counterpart
  71. GRB 170510A: Swift-XRT observations
  72. GRB 170510A: Tiled Swift observations
  73. GRB 170510A: Fermi-LAT detection
  74. Swift Trigger 752193 is not a GRB
  75. Trigger 751928: Swift misidentification of Cen X-3
  76. Swift XRT observations of GRB 170424A
  77. LIGO/Virgo G284239: Swift/BAT data search
  78. GRB 170428A: 15 GHz upper limits from AMI
  79. Swift Trigger 748858: 15 GHz upper limits from AMI
  80. Short GRB 170428A: MASTER-OAFA final reduction of the optical observations
  81. GRB 170428A: TAROT La Silla observatory optical observations
  82. GRB 170428A: Swift/UVOT Upper Limits
  83. GRB 170428A: Swift-XRT refined Analysis
  84. GRB 170428A: Swift-BAT refined analysis
  85. Konus-Wind observation of GRB 170428A
  86. GRB 170428A: MASTER-OAFA early optical observations
  87. Swift Trigger 750337 is probably a noise fluctuation
  88. GRB 170428A: Swift detection of a short burst
  89. Swift trigger 750096 - OT candidate
  90. GRB170426.95 MASTER-Net OT detection
  91. Swift Trigger 750096 is probably a noise fluctuation
  92. Swift Trigger 750044 is probably a noise fluctuation
  93. GRB 170424A: LCO Observations
  94. GRB 170419A: Swift/UVOT Upper Limits
  95. GRB 170424A: Tiled Swift observations
  96. GRB 170424A: Fermi-LAT detection
  97. GRB 170419A: LCO Observations
  98. Swift Trigger 748858: AbAO and TSHAO optical observations
  99. Swift Trigger 748858: TAROT La Silla observatory optical observations
  100. Swift Trigger 748858: RATIR Optical and NIR Observations

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