Millimagnitude Photometry for Transiting Extrasolar Planetary Candidates. II. Transits of OGLE‐TR‐113‐b in the Optical and Near‐IR

We present precise V and Ks-band transit photometry for the planetary hoststar OGLE-TR-113. Using the Ks-band photometry, we confirm the dwarf nature ofOGLE-TR-113, and obtain new estimates for its effective temperature, distanceand reddening. We employ the V-band photometry to obtain planetary and orbitparameters from the transit fit, a= (0.0232 \pm 0.0038) AU, orbital period P=(1.4324752 \pm 0.15) days, i= 86.7 - 90, R_p= (1.09 \pm 0.09) R_J. Thesevalues are in excellent agreement with previous works. Assuming a mass M_p=(1.32 \pm 0.19) M_J for the planet we obtain its mean density \rho= (1.26 \pm0.50) g cm^{-3}, also in agreement with previous works. The transit observed inthe Ks-band has a larger scatter and we find its amplitude to be consistentwith that in the V-band. In this way, we find an independent confirmation ofthe planetary nature of OGLE-TR-113b.Comment: 26 pages, 10 figures, 1 table. Accepted for publication in the Astrophysical Journa