中国虚拟天文台交叉证认工具的开发和应用  

The Development and Application of the Cross-match Tool of China-VO

作　　者：高丹[1] 张彦霞[1] 赵永恒[1] 

机构地区：[1]中国科学院国家天文台,北京100012

出　　处：《天文学报》2008年第3期348-358,共11页Acta Astronomica Sinica

基　　金：国家自然科学基金(10473013;90412016;10778724)资助项目

摘　　要：随着空间和地面巡天项目的发展,天文数据呈指数增长,天文学已发展到全波段的天文学时代.为了应对形势的需要,虚拟天文台应运而生.为了使天文学家做起科学来更方便快捷,虚拟天文台项目开发了各种实用工具.在数据融合方面,中国虚拟天文台项目开发了交叉证认工具.该工具主要实现了两个服务:一个是服务器端两星表交叉证认;另一个是用户上传星表与服务器端星表交叉证认.前者两星表直接进行交叉证认,后者则先将本地数据自动入库再进行交叉证认.程序还实现了对交叉证认结果的分类和参数的自由选择等功能,以及与可视化工具VOPlot的集成.该工具以客户端/服务器端模式的web网页形式发布.此工具为多波段数据融合提供了便利,是对两个大星表交叉证认工作的预研究.在以后的工作中,将不断地更新和完善该工具,并将在此基础之上进一步开发统计分析和数据挖掘等工具.With the deployment and developments of various space-based and ground-based sky survey projects,astronomical data increase in the rate of the exponen- tial growth form,and astronomy has paced into a full electromagnetic waveband era. Facing so huge amounts of data,how to save,organize,analysis and mine data is an im- portant issue for astronomers.Under these situations,the international virtual observa- tory projects are being carried out.Up to now,they have developed many practical tools,such as VOPlot by India VO,OpenSkyQuery by NVO and VOSpec by ESA-VO, VOSED by Spain VO.As a member of International Virtual Observatory Alliance (IVOA),China-VO project has developed a cross-match tool,which is realized by web service.The tool can handle two catalogues from the same server,and also deal with two catalogues of which one is from the server and the other is from users.For the for- mer one,users can execute cross-matching directly,and for the latter,users need to upload the local data into the server database by the automated software of database cre- ation and then perform the cross-matching task.Meanwhile,the tool provides different kinds of cross-matching results and the selection of parameters.According to their own requirement,users can conveniently choose the cross-matching result and parameters. This tool is mainly used for multi-wavelength data integration,and the pre-research of cross-identification of two huge catalogues.In the near future,we will continuously en- hance and update the tool,further develop statistical analysis tools and data mining tools on the basis of this work.

关 键 词：方法 数据分析 方法 统计 天文数据库 星表 巡天 

分 类 号：P114[天文地球—天文学]