利用小型望远镜和苔丝观测对卡塔尔-4b、HAT-P-18b和CoRoT-1b进行星历改进
Ephemeris Refinement for Qatar-4 b, HAT-P-18 b, and CoRoT-1 b with Small Telescope and TESS Observations
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中文总结 AI 辅助
该研究利用小型望远镜网络和TESS数据，给出三颗热木星更新的凌星时间测量值，结合存档结果得到精确轨道解，相比近期星历有改进，降低了凌星时间和轨道周期不确定性，提高了未来凌星预测精度。
中文摘要 AI 辅助
我们利用从微型天文台望远镜网络（一个由小型地面机器人望远镜组成的网络）和美国国家航空航天局凌日系外行星勘测卫星（TESS）收集的数据，给出了三颗热木星（卡塔尔-4b、HAT-P-18b和CoRoT-1b）的更新凌星时间测量值。通过将这些数据与已发表的存档结果相结合，我们给出了这三个系统迄今为止最精确的轨道解，以便为未来任务进行精确的凌星时间预测。我们报告了卡塔尔-4b更新的凌星中点时间为2458919.5838±0.000089 BJD_TDB，更新的轨道周期为1.80536560±0.00000021天。对于HAT-P-18b，我们发现凌星中点时间为2459743.85340±0.000022 BJD_TDB，更新的轨道周期为5.50802957±0.00000012天。对于CoRoT-1b，我们报告凌星中点时间为2456268.99083±0.000099 BJD_TDB，更新的轨道周期为1.50896846±0.000000071天。我们的结果表明比最近发表的星历有改进，卡塔尔-4b、HAT-P-18b和CoRoT-1b的凌星中点时间不确定性分别降低了36.4%、4.35%和17.5%，轨道周期不确定性分别降低了65.0%、77.4%和16.9%。本研究结果提高了未来凌星预测的精度，并证明了在更新热木星轨道参数时协调小型望远镜监测（和公民科学计划）的价值。
英文摘要
We present updated transit timing measurements for three hot Jupiters (Qatar-4 b, HAT-P-18 b, and CoRoT-1 b) by leveraging data collected from the MicroObservatory Telescope Network, a network of small, robotic ground-based telescopes, and the NASA Transiting Exoplanet Survey Satellite (TESS). By combining these data with archival published results, we present the most precise orbital solutions to date for all three systems, allowing for precise transit time predictions for future missions. We report an updated mid-transit time for Qatar-4 b of 2458919.5838 $\pm$ 0.000089 $\mathrm{BJD}_{\mathrm{TDB}}$ and an updated orbital period of 1.80536560 $\pm$ 0.00000021 days. For HAT-P-18 b, we find a mid-transit time of 2459743.85340 $\pm$ 0.000022 $\mathrm{BJD}_{\mathrm{TDB}}$ and an updated orbital period of 5.50802957 $\pm$ 0.00000012 days. For CoRoT-1 b, we report a mid-transit time of 2456268.99083 $\pm$ 0.000099 $\mathrm{BJD}_{\mathrm{TDB}}$ and an updated orbital period of 1.50896846 $\pm$ 0.000000071 days. Our results demonstrate improvements over recently published ephemerides, with reductions of 36.4%, 4.35%, and 17.5% in mid-transit time uncertainties and 65.0%, 77.4%, and 16.9% in orbital period uncertainties for Qatar-4 b, HAT-P-18 b, and CoRoT-1 b, respectively. The results of this study improve the precision of future transit predictions and demonstrate the value of coordinated small-telescope monitoring (and citizen science initiatives) when updating the orbital parameters of hot Jupiters.
