2017AJ....154..137J

We present measurements of the spin-orbit misalignments of the hot Jupiters HAT-P-41 b and WASP-79 b, and the aligned warm Jupiter Kepler-448 b. We obtain these measurements with Doppler tomography, where we spectroscopically resolve the line profile perturbation during the transit due to the Rossiter-McLaughlin effect. We analyze time series spectra obtained during portions of five transits of HAT-P-41 b, and find a value of the spin-orbit misalignment of λ=-22.1_–6.0^+0.8^○^. We reanalyze the radial velocity Rossiter-McLaughlin data on WASP-79 b obtained by Addison et al. using Doppler tomographic methodology. We measure λ=-99.1_–3.9^+4.1^○^, consistent with but more precise than the value found by Addison et al. For Kepler-448 b we perform a joint fit to the Kepler light curve, Doppler tomographic data, and a radial velocity data set from Lillo-Box et al. We find an approximately aligned orbit (λ=-7.1_–2.8^+4.2^○^), in agreement with the value found by Bourrier et al. Through analysis of the Kepler light curve we measure a stellar rotation period of P_rot=1.27±0.11 days, and use this to argue that the full three-dimensional spin-orbit misalignment is small, ψ∼0^○.