A year in the life of GW170817: the rise and fall of a structured jet from a binary neutron star merger

  title={A year in the life of GW170817: the rise and fall of a structured jet from a binary neutron star merger},
  author={Eleonora Troja and Hendrik van Eerten and Geoffrey Ryan and Roberto Ricci and J. Michael Burgess and Mark H. Wieringa and Luigi Piro and S. Bradley Cenko and Takanori Sakamoto},
  journal={Monthly Notices of the Royal Astronomical Society},
We present the results of our year-long afterglow monitoring of GW170817, the first binary neutron star (NS) merger detected by advanced LIGO and advanced Virgo. New observations with the Australian Telescope Compact Array (ATCA) and the Chandra X-ray Telescope were used to constrain its late-time behavior. The broadband emission, from radio to X-rays, is well-described by a simple power-law spectrum with index β ∼0.585 at all epochs. After an initial shallow rise ∝ t0.9, the afterglow… 

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