A NuSTAR Observation of the Reflection Spectrum of the Low-mass X-Ray Binary 4U 1728-34

  title={A NuSTAR Observation of the Reflection Spectrum of the Low-mass X-Ray Binary 4U 1728-34},
  author={Clio C. Sleator and John A. Tomsick and Ashley L. King and Jon M. Miller and Steven E. Boggs and Matteo Bachetti and Didier Barret and J{\'e}r{\^o}me Chenevez and F. E. Christensen and William W. Craig and Charles James Hailey and Fiona A. Harrison and Farid Rahoui and Daniel Stern and Dominic J. Walton and Will Zhang},
  journal={The Astrophysical Journal},
We report on a simultaneous NuSTAR and Swift observation of the neutron star low-mass X-ray binary 4U 1728-34. We identified and removed four Type I X-ray bursts during the observation in order to study the persistent emission. The continuum spectrum is hard and described well by a blackbody with kT = 1.5 keV and a cutoff power law with Γ = 1.5, and a cutoff temperature of 25 keV. Residuals between 6 and 8 keV provide strong evidence of a broad Fe Kα line. By modeling the spectrum with a… Expand

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