We present the results of 45 transit observations obtained for the transiting exoplanet HAT-P-32b. The transits have been observed using several telescopes mainly throughout the YETI network. In 25 cases, complete transit light curves with a timing precision better than 1.4min have been obtained. These light curves have been used to refine the system properties, namely inclination i, planet-to-star radius ratio Rp/Rs, and the ratio between the semimajor axis and the stellar radius a/Rs. First analyses by Hartman et al. (2011) suggest the existence of a second planet in the system, thus we tried to find an additional body using the transit timing variation (TTV) technique. Taking also literature data points into account, we can explain all mid-transit times by refining the linear ephemeris by 21ms. Thus we can exclude TTV amplitudes of more than ∼1.5min.
@article{arxiv.1404.6354,
title = {Transit Timing Analysis in the HAT-P-32 system},
author = {M. Seeliger and D. Dimitrov and D. Kjurkchieva and M. Mallonn and M. Fernandez and M. Kitze and V. Casanova and G. Maciejewski and J. M. Ohlert and J. G. Schmidt and A. Pannicke and D. Puchalski and E. Göğüş and T. Güver and S. Bilir and T. Ak and M. M. Hohle and T. O. B. Schmidt and R. Errmann and E. Jensen and D. Cohen and L. Marschall and G. Saral and I. Bernt and E. Derman and C. Gałan and R. Neuhäuser},
journal= {arXiv preprint arXiv:1404.6354},
year = {2014}
}