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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"

21009 results found.

  1. GRB 170522A: Swift-XRT observations
  2. GRB 170522A: Global MASTER-Net job
  3. GRB 170522A: Tiled Swift observations
  4. GRB 170519A: Watcher optical observations
  5. GRB 170519A: Continued RATIR Optical and NIR Observations
  6. GRB 170519A: NOT optical observations
  7. GRB170519A, Swift-UVOT Detection
  8. GRB 170519A: KAIT Optical Observations
  9. GRB 170519A: iTelescope T11 optical observations
  10. GRB 170519A: Weihai optical observations
  11. GRB 170510A: LCO Siding Springs early observations
  12. GRB 170519A: RATIR Optical and NIR Observations
  13. GRB 170519A: optical observations
  14. GRB 170510A: Swift-XRT afterglow detection
  15. GRB 170516A: Swift/UVOT Upper Limits
  16. Swift Trigger AXP CXOU J164710.2-455216: MASTER-OAFA observations
  17. Swift Trigger on AXP CXOU J164710.2-455216
  18. GRB 170510A: Global MASTER Net possible OT observations
  19. LIGO/Virgo G275404 and G275659: SkyMapper Follow-up Observations
  20. LIGO/Virgo G284239: Konus-Wind observations
  21. GRB 170510A: LCO possible counterpart
  22. GRB 170510A: Swift-XRT observations
  23. LIGO/Virgo G284239: H.E.S.S. very-high energy gamma-ray follow-up
  24. LIGO/Virgo G284239: MAXI/GSC observations
  25. GRB 170510A: Tiled Swift observations
  26. GRB 170423A: TAROT Reunion observatory optical observations
  27. Swift XRT observations of GRB 170424A
  28. LIGO/Virgo G284239:SVOM/Mini-GWAC observations of the initial skymap
  29. LIGO/Virgo G284239: HAWC follow-up
  30. LIGO/Virgo G284239: MASTER automatic follow up and synchronous observations
  31. LIGO/Virgo G284239: TZAC TAROT network observations with TRE/TCA/TCH
  32. LIGO/Virgo G284239: AGILE GRID observations
  33. LIGO/Virgo G284239: INTEGRAL search for a prompt gamma-ray counterpart
  34. LIGO/Virgo G284239: AGILE MCAL Observations
  35. LIGO/Virgo G284239: IceCube neutrino observations
  36. GRB 170428A: GTC spectroscopic redshift of candidate host galaxy
  37. GRB 170428A: 15 GHz upper limits from AMI
  38. Swift Trigger 748858: 15 GHz upper limits from AMI
  39. GRB 170428A: TNG optical observations
  40. Short GRB 170428A: MASTER-OAFA final reduction of the optical observations
  41. GRB 170428A: DCT Imaging
  42. GRB 170428A: TAROT La Silla observatory optical observations
  43. GRB 170428A: RATIR Afterglow Confirmation
  44. GRB 170428A: GROND detection of the afterglow
  45. GRB 170428A: Swift/UVOT Upper Limits
  46. GRB 170428A: MASTER-OAFA early optical observations
  47. GRB 170424A: LCO Observations
  48. GRB 170419A: Swift/UVOT Upper Limits
  49. GRB 170424A: Tiled Swift observations
  50. GRB 170419A: LCO Observations
  51. Swift Trigger 748858: AbAO and TSHAO optical observations
  52. Swift Trigger 748858: TAROT La Silla observatory optical observations
  53. Swift Trigger 748858: RATIR Optical and NIR Observations
  54. GRB 170419B: Zadko observatory - Gingin optical observations
  55. GRB 170419A: Zadko observatory - Gingin optical observations
  56. Swift trigger 748858: Swift BAT, XRT, and UVOT refined analysis
  57. Swift Trigger 748858: MASTER-OAFA early optical observations
  58. Swift Trigger 748858: Zadko observatory - Gingin optical observations
  59. LIGO/Virgo G275404: DLT40 follow-up observation
  60. GRB 170409A: TAROT Reunion observatory optical observations
  61. GRB 170405A: SMARTS optical/IR afterglow observations
  62. GRB 170317A: SAO RAS optical observations
  63. GRB170405A, Swift-UVOT Detection
  64. GRB 170405A: Etelman observatory optical observations
  65. GRB 170405A: RATIR Optical and NIR Observations
  66. GRB 170405A: LCO FTN observations
  67. GRB 170405A: ISON/Terskol optical observations
  68. GRB 170405A: Watcher optical detection
  69. GRB 170405A: TAROT Reunion observatory optical observations
  70. GRB 170405A: NOT optical observations
  71. LIGO/Virgo G275404: European VLBI Network (EVN) follow-up of the near-IR transient in the AGL J1914+1043 field
  72. GRB 170325A: optical observations, possible OT/host detection
  73. Fermi-LAT Gamma-ray Observations of IceCube-170321
  74. Swift triggered on SAX J1806.5-221
  75. GRB 170331A: Swift/UVOT Upper Limits
  76. IceCube-170321A: Swift-XRT observations
  77. GRB 170330A: Swift/UVOT Detection of a Fading Afterglow
  78. GRB 170325A: 15 GHz upper limits from AMI
  79. GRB 170318B: 15 GHz upper limits from AMI
  80. GRB 170318A: 15 GHz upper limits from AMI
  81. GRB 170317A: 15 GHz upper limits from AMI
  82. GRB 170330A: LCO Cerro Tololo observations
  83. LIGO/Virgo G275697: LOFAR follow-up
  84. GRB 170331A: LCO Sutherland observations
  85. Fermi trigger 512347439/GRB 170327A: MASTER-SAAO possible OT detection
  86. LIGO/Virgo G277583: Konus-Wind observations
  87. INTEGRAL pointed follow-up of IceCube-170321A
  88. LIGO/Virgo G277583: Fermi GBM Observations
  89. LIGO/Virgo G277583: INTEGRAL search for an X-ray and gamma-ray counterpart
  90. LIGO/Virgo G275697: AMI Large Array Search for a Radio Afterglow
  91. GRB 170318A: KAIT Optical Upper Limit
  92. GRB 170317A: Mondy optical observations
  93. GRB 170318B: RATIR Optical and NIR Observations
  94. GRB 170317A: RATIR Optical and NIR Observations
  95. GRB 170318B: Swift/UVOT Upper Limits
  96. LIGO/Virgo G277583: CALET Observations
  97. GRB 170318A: RATIR Optical and NIR Observations
  98. GRB 170318A: Swift/UVOT Upper Limits
  99. GRB 170317A: RATIR Optical and NIR Observations
  100. IceCube-170312A: MASTER follow-up observations

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