Comparison of the LSD Stokes I intensity profile of Vega obtained with NARVAL/TBL and the new NEXTRA pipeline (red) and a quasi-simultaneous observation with SOPHIE/OHP (within one minute, blue), both processed with LSDpy. Stokes I profiles are quasi-identical. The difference of the SOPHIE and NARVAL profile is presented in the top panel (orange). Dashed blue line corresponds to the radial velocity of Vega of −13.9 km s⁻¹. The dashed yellow lines show ±v sin i (21.6 km s⁻¹), while the dashed red lines correspond to the outer limits of the profile including gaussian broadening (at additional ±10 km s⁻¹). Data come from 1 August 2018 at 23:11 UT.