超大视场光学巡天中光变曲线的自动化周期确定算法研究

According to the characteristics of ultra-wide-field optical surveys, this application will research on an automated period finding algorithm, which will cover light curves both of high earth orbit space debris and of variable stars. This research will deal with the main concerns, such as the difficulty to determine the light-curve periods, the low coverage of single algorithm to much different light-curves belonging to many kinds of variables, the stress of mass data, of ultra wide field optical surveys. The analysis method of photometric data and associated software, which will satisfy the requirements of Purple Mountain Observatory's TST project, will be developed based on the light-curve period finding algorithms used by survey projects of other countries. Except the direct usage on TST, the resulting algorithms could be used by the analysis of both low earth orbit space debris or the variables in general. In such a way, this application is very scientifically meaningful, and important in practice as well.

本申请提出针对超大视场光学巡天的特点，开展涵盖了中高轨空间碎片和变星的光变曲线的自动周期确定算法研究，以解决超大视场光学巡天中面临的一些难题，诸如碎片光变周期难以确定，单一算法无法处理所有类型的光变曲线，无法处理海量的数据等问题。本申请将在国际上其他巡天项目所采用的光变曲线分析处理方法的基础上，针对紫台TST项目的需求，研究测光数据分析处理方法和软件系统。研究成果除了用于TST外，还可直接应用的低轨碎片测光研究中，也可应用到一般变星的光变曲线处理中去。因此，本课题不但有重要的科学意义，更有着很好的应用价值。

本项目针对超大视场光学巡天的特点，开展涵盖了中高轨空间碎片和变星的光变曲线的自动周期确定算法研究。项目实现了超大视场光学巡天的全自动光变周期提取，支持了CHES巡天项目的日常运行，经受了海量数据的检验，实际应用效果良好；形成了mkwcs这个性能优异的图像天体测量软件，该软件将在近期发表，可极大方便各方向的天文工作者，有很好的应用前景；本项目研究成果还将应用于MASTA这一将国际领先的大视场光学巡天项目，为本项目成果提供了一个更大的应用舞台。