耶拿大学天文台的行星transit观测：XO-1 b和TrES-1
Planetary transit observations at the University Observatory Jena: XO-1b and TrES-1
摘要：
我们报告的过境事件的过境行星XO-1b和TrES-1与耶拿大学天文台的25厘米望远镜的观测。根据所有50个可用的XO，SuperWASP，凌光曲线（TLC）-项目-和系外行星凌日数据库（ETD）-数据，包括我们自己在2007年3月获得的I波段测光，我们发现XO-1b的轨道周期为P=（3.941501 +/- 0.000001）d，与以前公布的周期相比略有变化约3秒。我们为这颗凌日行星提供了新的星历表。此外，我们提出了新的R带测光的两个过境的TrES-1。借助文献中所有可用的渡越时间，这使我们能够改进轨道周期的估计：P=（3.0300722 +/- 0.0000002）d。我们的观察将是有用的时间变化所造成的额外的扰动行星和/或恒星斑点和/或卫星的未来调查。
英文摘要：
We report on observations of transit events of the transiting planets XO-1b and TrES-1 with a 25 cm telescope of the University Observatory Jena. With the transit timings for XO-1b from all 50 available XO, SuperWASP, Transit Light Curve (TLC)-Project- and Exoplanet Transit Database (ETD)-data, including our own I-band photometry obtained in March 2007, we find that the orbital period is P= (3.941501 +/- 0.000001) d, a slight change by ~3 s compared to the previously published period. We present new ephemeris for this transiting planet. Furthermore, we present new R-band photometry of two transits of TrES-1. With the help of all available transit times from literature this allows us to refine the estimate of the orbital period: P=(3.0300722 +/- 0.0000002) d. Our observations will be useful for future investigations of timing variations caused by additional perturbing planets and/or stellar spots and/or moons.
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