Mapping the emission line strengths and kinematics of Supernova Remnant
  S147 with extensive LAMOST spectroscopic observations
  We present extensive spectroscopic observations of supernova remnant (SNR)
S147 collected with the Large sky Area Multi-Object fiber Spectroscopic
Telescope (LAMOST). The spectra were carefully sky-subtracted taking into
account the complex filamentary structure of S147. We have utilized all
available LAMOST spectra toward S147, including sky and stellar spectra. By
measuring the prominent optical emission lines including H{\alpha},
[NII]{\lambda}6584, and [SII]{\lambda}{\lambda}6717,6731, we present maps of
radial velocity and line intensity ratio covering the whole nebula of S147 with
unprecedented detail. The maps spatially correlated well with the complex
filamentary structure of S147. For the central 2 deg of S147, the radial
velocity varies from -100 to 100 km/s and peaks between ~ 0 and 10 km/s. The
intensity ratios of H{\alpha}/[SII]{\lambda}{\lambda}6717,6731,
[SII]{\lambda}6717/{\lambda}6731 and H{\alpha}/[NII]{\lambda}6584 peak at about
0.77, 1.35 and 1.48, respectively, with a scatter of 0.17, 0.19 and 0.37,
respectively. The intensity ratios are consistent with the literature values.
However, the range of variations of line intensity ratios estimated here and
representative of the whole nebula, are larger than previously estimated.
