Description
We report the discovery of three new transiting extrasolar planets orbiting moderately bright (V=11.1, 11.7, and 12.4) F stars. The planets HAT-P-39b through HAT-P-41b have periods of P=3.5439days, 4.4572days, and 2.6940days, masses of 0.60M_J_, 0.62M_J_, and 0.80M_J_, and radii of 1.57R_J_, 1.73R _J_, and 1.68R_J_, respectively. They orbit stars with masses of 1.40 M _{sun}_, 1.51 M_{sun}_, and 1.51 M_{sun}_, respectively. The three planets are members of an emerging population of highly inflated Jupiters with 0.4M_J_<M<1.5M_J_ and R>1.5R_J_.
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