Analysis of photometric uncertainties in the OGLE-IV Galactic Bulge microlensing survey data
Analysis of photometric uncertainties in the OGLE-IV Galactic Bulge microlensing survey data
复制标题
OGLE-IV银河核球微透镜巡天数据中的光度不确定度分析
DOI：
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发表时间：
2016
期刊：
影响因子：
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通讯作者：
I. Soszy'nski
中科院分区：
文献类型：
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作者：
J. Skowron;A. Udalski;S. Kozłowski;M. Szyma'nski;P. Mr'oz;L. Wyrzykowski;R. Poleski;P. Pietrukowicz;K. Ulaczyk;M. Pawlak;I. Soszy'nski
我们提出了一个统计评估，观察到的和报告，光度的不确定性OGLE-IV星系核球微透镜调查数据。该数据集被广泛用于变星、瞬变天体的探测、微透镜事件的发现以及系外行星系统的表征。OGLE项目发现的大量天琴座RR型恒星和造父变星在银河系凸出处提供了基于该数据集的光变曲线。我们描述了分析方法，并提供了程序，该程序可用于将光变曲线提供的初步光度不确定度更新为反映给定量级和OGLE-IV相机给定CCD探测器的实际观察到的散射的不确定度。这对于数据建模至关重要，特别是对于拟合优度的正确估计。
We present a statistical assessment of both, observed and reported, photometric uncertainties in the OGLE-IV Galactic bulge microlensing survey data. This dataset is widely used for the detection of variable stars, transient objects, discovery of microlensing events, and characterization of the exo-planetary systems. Large collections of RR Lyrae stars and Cepheids discovered by the OGLE project toward the Galactic bulge provide light curves based on this dataset. We describe the method of analysis, and provide the procedure, which can be used to update preliminary photometric uncertainties, provided with the light curves, to the ones reflecting the actual observed scatter at a given magnitude and for a given CCD detector of the OGLE-IV camera.This is of key importance for data modeling, in particular, for the correct estimation of the goodness of fit.