Photometric and spectroscopic observations of exoplanet transit events

Abstract

Firstly, we review simply the exoplanet transit events and introduce our ongoing optical wavelength project. Then, we present new photometric observations of the transiting planets (HAT-P-10b/WASP-11b, HAT-P-19b, WASP-43b, : : : ) using an 85-cm telescope of Xinglong Station of the National Astronomical Observatories of China in 2012. New transit curves are modeled using the JKTEBOP code and adopting the quadratic limb-darkening law. The preliminary parameters (the orbital inclination, relative radius : : : : : : ) of these star-planet systems are re-obtained. We also revise the ephemeris with a transit epoch and discuss a period change by the observed minimum minus calculated transit times. Finally, our future plans in China are given and discussed.