modified version of the [redspec]{} package as described in @Vos2017.

We use the method outlined in our previous work [@Allers2016; @Vos2017] to calculate the radial and rotational velocity of our three targets. We use forward modelling to simultaneously fit the wavelength solution, the scaling of telluric line depths, the FWHM of the instrument line spread function and the target radial and rotation velocity. The BT-Settl model atmospheres [@Allard2012] are used as the intrinsic spectrum for each target. We use MCMC methods to determine the posterior distributions for our forward model parameters. [To ensure that the median absolute residual of the fit agrees with the median uncertainty of our spectra, we include a systematic uncertainty in our analysis. We obtain a systematic uncertainty of $1.9\%$ for , and $1.7\%$ for and $3\%$ for .]{} Radial velocity (RV) and $v\sin(i)$ [values and their $1\sigma$ uncertainties are determined from their marginalized distributions obtained from our MCMC method.]{} For more detail on the method we refer to reader to @Allers2016. In Figure \[fig:2M0501\_vsini\] we show the observed spectrum of , our fit to the data and the residuals of the fit. We show our measured $v\sin (i)$ and RV values for all three targets 