The transiting system GJ1214: high-precision defocused transit observations and a search for evidence of transit timing variation
The transiting system GJ1214: high-precision defocused transit observations and a search for evidence of transit timing variation
复制标题
凌日系统GJ1214：高精度散焦凌日观测并寻找凌日时间变化的证据
DOI：
10.1051/0004-6361/201219996
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发表时间：
2012
影响因子：
6.5
通讯作者：
Harpsøe K
中科院分区：
文献类型：
--
作者：
Harpsøe K
介绍了11颗凌日超地球行星GJ 1214 B的高精度测光凌日观测结果。结合这些数据与其他作者的意见，我们调查的星历表可能的迹象过境时间变化（TTVs）使用Bayesian approach.MethodsThe意见获得使用望远镜散焦技术，并实现了高精度与随机误差的测光低至1毫微克每点。要调查的可能性TTV的光变曲线，我们计算的TTV信号使用贝叶斯methods.ResultsThe意见的整体概率被用来确定的光度参数和物理性质的GJ 1214系统。我们的结果是在良好的协议与公布的值。个别时间中过境测量的不确定性低至10秒，使我们能够减少的不确定性在轨道周期的一个因素two.ConclusionsA贝叶斯分析表明，这是极不可能的，所观察到的过境时间是由TTV引起的行星在名义上的可居住区，当比较简单的替代线性星历。
AimsWe present 11 high-precision photometric transitobservations of the transiting super-Earth planet GJ 1214 b. Combining these data with observations from other authors, we investigate the ephemeris for possible signs of transit timing variations (TTVs) using a Bayesian approach.MethodsThe observations were obtained using telescope-defocusing techniques, and achieve a high precision with random errors in the photometry as low as 1 mmag per point. To investigate the possibility of TTVs in the light curve, we calculate the overall probability of a TTV signal using Bayesian methods.ResultsThe observations are used to determine the photometric parameters and the physical properties of the GJ 1214 system. Our results are in good agreement with published values. Individual times of mid-transit are measured with uncertainties as low as 10 s, allowing us to reduce the uncertainty in the orbital period by a factor of two.ConclusionsA Bayesian analysis reveals that it is highly improbable that the observed transit times is explained by TTV caused by a planet in the nominal habitable zone, when compared with the simpler alternative of a linear ephemeris.
DOI：
10.1111/j.1365-2966.2010.17238.x
发表时间：
2010-11
影响因子：
4.8
作者：
J. Southworth;L. Mancini;S. Novati;M. Dominik;M. Glitrup;T. Hinse;U. Jørgensen;M. Mathiasen;D. Ricci;G. Maier;F. Zimmer;V. Bozza;P. Browne;I. Bruni;M. Burgdorf;M. Dall’ora;F. Finet;K. Harpsoe;M. Hundertmark;C. Liebig;S. Rahvar;G. Scarpetta;J. Skottfelt;B. Smalley;C. Snodgrass;J. Surdej
通讯作者：
J. Southworth;L. Mancini;S. Novati;M. Dominik;M. Glitrup;T. Hinse;U. Jørgensen;M. Mathiasen;D. Ricci;G. Maier;F. Zimmer;V. Bozza;P. Browne;I. Bruni;M. Burgdorf;M. Dall’ora;F. Finet;K. Harpsoe;M. Hundertmark;C. Liebig;S. Rahvar;G. Scarpetta;J. Skottfelt;B. Smalley;C. Snodgrass;J. Surdej