Photometric Observation and Study of the Transiting Exoplanetary System HAT-P-8 |
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| Authors: | TAN Hong-bo WANG Xiao-bin GU Sheng-hong Andrew Collier Cameron |
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| Institution: | 1. Yunnan Astronomical Observatory, Chinese Academy of Sciences, Kunming 650011;2. University of Chinese Academy of Sciences, Beijing 100049;3. School of Physics and Astronomy, University of St Andrews, North Haugh, St Andrews, Fife KY16 9SS UK |
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| Abstract: | Three transit events of HAT-P-8 were observed by using the 1 m telescope of Yunnan Observatory and the 2.4 m telescope of Lijiang Astronomical Station in 2009 and 2012, respectively. The observational data are reduced with the coarse de-correlation and SysRem algorithms in order to improve the signal to noise ratio of the transit signals. The MCMC (Markov Chain Monte Carlo) technique is applied to analyzing the three transit light curves simultaneously, then the new parameters of the HAT-P-8 system are derived. The new value of the radius of HAT-P-8b is smaller than that given by Latham et al., while it is consistent with the value derived recently by Mancini et al. By linear ?tting on the 23 high-precision mid-transit times, the orbital period of HAT-P-8b is re?ned as P =3.0763461±0.0000021 d, and from the (O − C) analysis no obvious TTV (Transit Timing Variation) signal has been detected. |
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| Keywords: | Planets and Satellites individual Methods observational Methods data analysis |
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