The Palomar Testbed Interferometer Calibrator Catalog
The Palomar Testbed Interferometer Calibrator Catalog
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Palomar 测试台干涉仪校准器目录
DOI：
10.1086/526548
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发表时间：
2007
期刊：
影响因子：
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通讯作者：
for the Lsst Collaboration
中科院分区：
文献类型：
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作者：
G. Belle;G. Belle;M. Creech;J. Coyne;A. Boden;R. Akeson;D. Ciardi;K. Rykoski;R. Thompson;B. Lane;for the Lsst Collaboration
帕洛玛试验台干涉仪（PTI）的观测档案在1998年和2005年之间的检查对象适合校准的光学长基线干涉仪观测恒星是可预测的点状和单一的。在这次调查中，对1800个物体的大约1400个夜晚的数据进行了检查。我们将这些观察结果与一个经过深入研究的对象（即合适的校准器HD 217014）进行比较，并通过计算Mahalanobis距离和主成分分析将每个候选校准器与该对象进行统计比较。我们的假设是，与校准星相关的可见度数据的频率分布不同于非校准星，如双星。光谱二进制解决PTI，对象已知不适合校准器使用，类似地进行测试，以建立这种方法的检测限。从这次调查中，我们发现超过350颗观测到的恒星适合用作校准器（另有140颗被拒绝），相当于PTI的95%天空覆盖率。这种方法值得注意的是，它通过可追溯的经验方法严格建立校准源，利用光谱能量分布建模的预测，同时也用PTI丰富的天空观测数据进行验证。
The Palomar Testbed Interferometer (PTI) archive of observations between 1998 and 2005 is examined for objects appropriate for calibration of optical long-baseline interferometer observations—stars that are predictably pointlike and single. Approximately 1400 nights of data on 1800 objects were examined for this investigation. We compare those observations to an intensively studied object that is a suitable calibrator, HD 217014, and statistically compare each candidate calibrator to that object by computing both a Mahalanobis distance and a principal component analysis. Our hypothesis is that the frequency distribution of visibility data associated with calibrator stars differs from noncalibrator stars such as binary stars. Spectroscopic binaries resolved by PTI, objects known to be unsuitable for calibrator use, are similarly tested to establish detection limits of this approach. From this investigation, we find more than 350 observed stars suitable for use as calibrators (with an additional ≈140 being rejected), corresponding to ≳95% sky coverage for PTI. This approach is noteworthy in that it rigorously establishes calibration sources through a traceable, empirical methodology, leveraging the predictions of spectral energy distribution modeling but also verifying it with the rich body of PTI’s on-sky observations.