WARM SPITZER AND PALOMAR NEAR-IR SECONDARY ECLIPSE PHOTOMETRY OF TWO HOT JUPITERS: WASP-48b AND HAT-P-23b

We report secondary eclipse photometry of two hot Jupiters, WASP-48b and HAT-P-23b, at 3.6 and 4.5 μm taken with the InfraRed Array Camera aboard the Spitzer Space Telescope during the warm Spitzer mission and in the H and KS bands with the Wide Field IR Camera at the Palomar 200 inch Hale Telescope. WASP-48b and HAT-P-23b are Jupiter-mass and twice Jupiter-mass objects orbiting an old, slightly evolved F star and an early G dwarf star, respectively. In the H, KS, 3.6 μm, and 4.5 μm bands, respectively, we measure secondary eclipse depths of 0.047 % ± 0.016%, 0.109 % ± 0.027%, 0.176 % ± 0.013%, and 0.214 % ± 0.020 % for WASP-48b. In the KS, 3.6 μm, an