Precision wavelength calibration for radial velocity measurements using uranium lines between 3800 and 6900 ?

We present here the precise wavelength calibration of a high-resolution spectrum using Uranium (U) lines in range 3809 - 6833 \AA\ for precision radial velocity measurements exoplanet detection or related astrophysical sciences. identify 1540 well-resolved U from (R=67,000) uranium-argon hollow cathode lamp (UAr HCL) PARAS spectrograph aforesaid range. calculate neutral and first allowed transitions (Ritz wavelength) its known energy levels compare them with our observed central wavelengths. measure an offset -0.15 m\AA\space final line list. The list has average measurement uncertainty 15 m s$^{-1}$ (0.013 pixels 0.28 m\AA). included these to data analysis framework perform then multi-order Radial Velocity (RV) spectra. typical dispersion residuals around solution UAr spectrum, lines, is found be 0.8 m\AA\space($\sim$45 s$^{-1}$). With use this list, we results RV on-sky source (A standard star), off-sky along HCL. absolute drift difference between two fibers (inter-fiber drift) span 6.5 hours 88 cm s$^{-1}$, (${\sigma_{RV}}$) star, HD55575 over course $\sim$450 days 3.2 s$^{-1}$. These are good agreement previous ones measured ThAr It proves that HCL $\sim$ 99\% pure-Th replaceable spectrographs such as (R $\leq$ 67,000) achieve 1-3 visible region.