An Improved Method for Differential Photometry
An Improved Method for Differential Photometry
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差示光度测定的改进方法
DOI：
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发表时间：
2012
期刊：
影响因子：
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通讯作者：
Lihang Wang
中科院分区：
文献类型：
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作者：
Javier Fernández Fernández;D. Chou;Yen;Lihang Wang
提出了一种改进传统的差示测光方法，利用多颗辅助星来降低参考光曲线中的噪声，用于标定目标星的光曲线。本研究所使用的资料系由台湾自动望远镜网络取得。这里展示了两款δScuti，HD 163032和V830 HER的光线曲线作为示例。与传统的差示光度法、集合光度法、Tamuz、Mazeh和Zucker法以及趋势滤波算法进行了比较。在保留脉动信号的情况下，我们的方法计算的光曲线比其他四种方法更平滑。与其他方法相比，我们的方法由光曲线确定的模式频率也具有较高的S/N和较小的误差。
We developed a method to improve the conventional differential photometry by using many auxiliary stars to reduce noise in the reference light curve, which is used to calibrate the light curve of the target star. The data used in this study are taken with the Taiwan Automated Telescope network. The light curves of two δ Scuti, HD 163032 and V830 Her, are shown here as examples. The results are compared with four other methods: conventional differential photometry; ensemble photometry; the method of Tamuz, Mazeh, & Zucker; and trend filtering algorithm. The light curve computed with our method is smoother than the other four methods, while preserving the pulsational signals. The mode frequencies determined from the light curve from our method also has a higher S/N and lower error in comparison with other methods.