K2-260 b: A hot Jupiter transiting an F star, and K2-261 b: A warm Saturn around a bright G star

We present the discovery and confirmation of two new transiting giant planets from the Kepler extended mission K2. K2-260 b is a hot Jupiter transiting a V = 12.7 F6V star in K2 Field 13, with a mass and radius of M⋆ =1.39+0.05−0.06 M⊙ and R⋆ = 1.69 ± 0.03 R⊙⁠. The planet has an orbital period of P = 2.627 d, and a mass and radius of MP=1.42+0.31−0.32MJ and RP=1.552+0.048−0.057RJ⁠. This is the first K2 hot Jupiter with a detected secondary eclipse in the Kepler bandpass, with a depth of 71 ± 15 ppm, which we use to estimate a geometric albedo of Ag ∼ 0.2. We also detected a candidate stellar companion at 0.6 arcsec from K2-260; we find that it is very likely physically associated with the system, in which case it would be an M5-6V star at a projected separation of ∼400 au. K2-261 b is a warm Saturn transiting a bright (V = 10.5) G7IV/V star in K2 Field 14. The host star is a metal rich ([Fe/H] = 0.36 ± 0.06), mildly evolved 1.10+0.01−0.02M⊙ star with R⋆ = 1.65 ± 0.04 R⊙⁠. Thanks to its location near the main-sequence turn-off, we can measure a relatively precise age of 8.8+0.4−0.3 Gyr. The planet has P = 11.633 d, MP = 0.223 ± 0.031 MJ⁠, and RP=0.850+0.026−0.022RJ⁠, and its orbit is eccentric (⁠e=0.39±0.15⁠). Its brightness and relatively large transit depth make this one of the best-known warm Saturns for follow-up observations to further characterize the planetary system.