The Optical Afterglow of GW170817: An Off-axis Structured Jet and Deep Constraints on a Globular Cluster Origin

  title={The Optical Afterglow of GW170817: An Off-axis Structured Jet and Deep Constraints on a Globular Cluster Origin},
  author={W. Fong and P. Blanchard and K. Alexander and J. Strader and R. Margutti and A. Hajela and V. Villar and Y. Wu and C. Ye and E. Berger and R. Chornock and D. Coppejans and P. Cowperthwaite and T. Eftekhari and D. Giannios and C. Guidorzi and A. Kathirgamaraju and T. Laskar and A. Macfadyen and B. D. Metzger and M. Nicholl and K. Paterson and G. Terreran and D. Sand and L. Sironi and P. Williams and X. Xie and J. Zrake},
  journal={arXiv: High Energy Astrophysical Phenomena},
  • W. Fong, P. Blanchard, +25 authors J. Zrake
  • Published 2019
  • Physics
  • arXiv: High Energy Astrophysical Phenomena
  • We present a revised and complete optical afterglow light curve of the binary neutron star merger GW170817, enabled by deep Hubble Space Telescope (HST) F606W observations at $\approx\!584$ days post-merger, which provide a robust optical template. The light curve spans $\approx 110-362$ days, and is fully consistent with emission from a relativistic structured jet viewed off-axis, as previously indicated by radio and X-ray data. Combined with contemporaneous radio and X-ray observations, we… CONTINUE READING
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