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We report the discovery of the transiting extrasolar planet HAT-P-49b. Theplanet transits the bright (V = 10.3) slightly evolved F-star HD 340099 with amass of 1.54M_S and a radius of 1.83 R_S. HAT-P-49b is orbiting one of the 25brightest stars to host a transiting planet which makes this a favorablecandidate for detailed follow-up. This system is an especially strong targetfor Rossiter- McLaughlin follow-up due to the fast rotation of the host star,16 km/s. The planetary companion has a period of 2.6915 d, mass of 1.73 M_J andradius of 1.41 R_J. The planetary characteristics are consistent with that of aclassical hot Jupiter but we note that this is the fourth most massive star tohost a transiting planet with both M_p and R_p well determined.

HAT-P-49b: A 1.7 M_J Planet Transiting a Bright 1.5 M_S F-Star