%0 Journal Article %T MASCARA-3b - A hot Jupiter transiting a bright F7 star in an aligned orbit %A A. B. Justesen %A E. Foxell %A E. Palle %A F. Grundahl %A F. Murgas %A G. J. J. Talens %A G. P. P. L. Otten %A I. A. G. Snellen %A M. Fredslund Andersen %A M. Hjorth %A P. Dorval %A R. Stuik %A S. Albrecht %A V. Antoci %A V. Van Eylen %J - %D 2019 %R 10.1051/0004-6361/201936082 %X We report the discovery of MASCARA-3b, a hot Jupiter orbiting its bright (V = 8.33) late F-type host every 5.55149 ¡À 0.00001 days in an almost circular orbit ( ). This is the fourth exoplanet discovered with the Multi-site All-Sky CAmeRA (MASCARA), and the first of these that orbits a late-type star. Follow-up spectroscopic measurements were obtained in and out of transit with the Hertzsprung SONG telescope. Combining the MASCARA photometry and SONG radial velocities reveals a radius and mass of 1.36 ¡À 0.05 RJup and 4.2 ¡À 0.2 MJup. In addition, SONG spectroscopic transit observations were obtained on two separate nights. From analyzing the mean out-of-transit broadening function, we obtain v sin i£¿ = 20.4 ¡À 0.4 km s£¿1. In addition, investigating the Rossiter-McLaughlin effect, as observed in the distortion of the stellar lines directly and through velocity anomalies, we find the projected obliquity to be deg, which is consistent with alignment %U https://www.aanda.org/articles/aa/full_html/2019/11/aa36082-19/aa36082-19.html