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We present new measurements of the projected spin--orbit angle $lambda$ for six WASP hot Jupiters, four of which are new to the literature (WASP-61, -62, -76, and -78), and two of which are new analyses of previously measured systems using new data (WASP-71, and -79). We use three different models based on two different techniques: radial velocity measurements of the Rossiter--McLaughlin effect, and Doppler tomography. Our comparison of the different models reveals that they produce projected stellar rotation velocities ($v sin I_{rm s}$) measurements often in disagreement with each other and with estimates obtained from spectral line broadening. The Boue model for the Rossiter--McLaughlin effect consistently underestimates the value of $vsin I_{rm s}$ compared to the Hirano model. Although $v sin I_s$ differed, the effect on $lambda$ was small for our sample, with all three methods producing values in agreement with each other. Using Doppler tomography, we find that WASP-61,b ($lambda=4^circ.0^{+17.1}_{-18.4}$), WASP-71,b ($lambda=-1^circ.9^{+7.1}_{-7.5}$), and WASP-78,b ($lambda=-6^circ.4pm5.9$) are aligned. WASP-62,b ($lambda=19^circ.4^{+5.1}_{-4.9}$) is found to be slightly misaligned, while WASP-79,b ($lambda=-95^circ.2^{+0.9}_{-1.0}$) is confirmed to be strongly misaligned and has a retrograde orbit. We explore a range of possibilities for the orbit of WASP-76,b, finding that the orbit is likely to be strongly misaligned in the positive $lambda$ direction.
We present new measurements of the Rossiter-McLaughlin (RM) effect for three WASP planetary systems, WASP-16, WASP-25 and WASP-31, from a combined analysis of their complete sets of photometric and spectroscopic data. We find a low amplitude RM effec
WASP-121b is one of the most studied Ultra-hot Jupiters: many recent analyses of its atmosphere report interesting features at different wavelength ranges. In this paper we analyze one transit of WASP-121b acquired with the high-resolution spectrogra
We present Rossiter-McLaughlin observations of WASP-13b and WASP-32b and determine the sky-projected angle between the normal of the planetary orbit and the stellar rotation axis ($lambda$). WASP-13b and WASP-32b both have prograde orbits and are con
We report the discovery and the Rossiter-McLaughlin effect of Kepler-8b, a transiting planet identified by the NASA Kepler Mission. Kepler photometry and Keck-HIRES radial velocities yield the radius and mass of the planet around this F8IV subgiant h
We present precise radial-velocity measurements of WASP-1 and WASP-2 throughout transits of their giant planets. Our goal was to detect the Rossiter-McLaughlin (RM) effect, the anomalous radial velocity observed during eclipses of rotating stars, whi