Python Leap Second Management and Implementation of Precise Barycentric Correction (barycorrpy)

Python Leap Second Management and Implementation of Precise Barycentric Correction (barycorrpy)
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Python闰秒管理与精确重心校正的实现(barycorrpy)

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发表时间:
2018
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通讯作者:
J. Wright
J. Wright
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文献类型:
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作者:
S. Kanodia;J. Wright

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我们宣布barycorpy (BCPy),这是一个Python实现,用于计算远低于1 cm/s水平的精确质心校正,遵循Wright和Eastman(2014)的算法。用径向速度(RV)方法在类太阳恒星的宜居带寻找1个地球质量的行星时需要这种精度,其中最大半振幅约为9厘米/秒。我们已经开发了BCPy,用于下一代多普勒光谱仪-宜居带行星发现者(HPF)和NEID。在这项工作中,我们还开发了一个自动化的闰秒管理程序,以改进Astropy中可用的闰秒管理程序。在从UT时间尺度转换为TDB之前,它检查并下载一个新的闰秒文件。
We announce barycorrpy (BCPy) , a Python implementation to calculate precise barycentric corrections well below the 1 cm/s level, following the algorithm of Wright and Eastman (2014). This level of precision is required in the search for 1 Earth mass planets in the Habitable Zones of Sun-like stars by the Radial Velocity (RV) method, where the maximum semi-amplitude is about 9 cm/s. We have developed BCPy to be used in the pipeline for the next generation Doppler Spectrometers - Habitable-zone Planet Finder (HPF) and NEID. In this work, we also develop an automated leap second management routine to improve upon the one available in Astropy. It checks for and downloads a new leap second file before converting from the UT time scale to TDB.