Qatar Exoplanet Survey : Qatar-3b, Qatar-4b, and Qatar-5b

We report the discovery of Qatar-3b, Qatar-4b, and Qatar-5b, three new transiting planets identified by the Qatar Exoplanet Survey. The three planets belong to the hot Jupiter family, with orbital periods of = 2.50792 days, = 1.80539 days, and = 2.87923 days. Follow-up spectroscopic observations reveal the masses of the planets to be = 4.31 ± 0.47 , = 6.10 ± 0.54 , and = 4.32 ± 0.18 , while model fits to the transit light curves yield radii of = 1.096 ± 0.14 , = 1.135 ± 0.11 , and = 1.107 ± 0.064 . The host stars are low-mass main sequence stars with masses and radii MQ3 = 1.145 ± 0.064 M⊙, MQ4 = 0.896 ± 0.048 M⊙, MQ5 = 1.128 ± 0.056 M⊙ and RQ3 = 1.272 ± 0.14 R⊙, RQ4 = 0.849 ± 0.063 R⊙, and RQ5 = 1.076 ± 0.051 R⊙ for Qatar-3, 4, and 5 respectively. The V magnitudes of the three host stars are VQ3 = 12.88, VQ4 = 13.60, and VQ5 = 12.82. All three new planets can be classified as heavy hot Jupiters (M > 4 MJ).