首页|A Cross-matching Service for Data Center of Xinjiang Astronomical Observatory

A Cross-matching Service for Data Center of Xinjiang Astronomical Observatory

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Cross-matching is a key technique to achieve fusion of multi-band astronomical catalogs.Due to different equipment such as various astronomical telescopes,the existence of measurement errors,and proper motions of the celestial bodies,the same celestial object will have different positions in different catalogs,making it difficult to integrate multi-band or full-band astronomical data.In this study,we propose an online cross-matching method based on pseudo-spherical indexing techniques and develop a service combining with high performance computing system(Taurus)to improve cross-matching efficiency,which is designed for the Data Center of Xinjiang Astronomical Observatory.Specifically,we use Quad Tree Cube to divide the spherical blocks of the celestial object and map the 2D space composed of R.A.and decl.to 1D space and achieve correspondence between real celestial objects and spherical patches.Finally,we verify the performance of the service using Gaia 3 and PPMXL catalogs.Meanwhile,we send the matching results to VO tools-Topcat and Aladin respectively to get visual results.The experimental results show that the service effectively solves the speed bottleneck problem of cross-matching caused by frequent I/O,and significantly improves the retrieval and matching speed of massive astronomical data.

virtual observatory toolsastronomical databases:miscellaneouscatalogs

Hai-Long Zhang、Jie Wang、Xin-Chen Ye、Wan-Qiong Wang、Jia Li、Ya-Zhou Zhang、Xu Du、Han Wu、Ting Zhang

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Xinjiang Astronomical Observatory,Chinese Academy of Sciences,Urumqi 830011,China

Key Laboratory of Radio Astronomy,Chinese Academy of Sciences,Nanjing 210008,China

National Astronomical Data Center,Beijing 100101,China

University of Chinese Academy of Sciences,Beijing 100049,China

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国家重点研发计划国家重点研发计划国家自然科学基金国家自然科学基金Tianshan Innovation Team Plan of Xinjiang Uygur Autonomous RegionTianshan Talent Project of Xinjiang Uygur Autonomous RegionScientific Instrument Developing Project of the Chinese Academy of SciencesChina National Astronomical Data Center(NADC)Operation,Maintenance and Upgrading Fund for Astronomical Telescopes and Facility Instruments,budgeted from the Ministry of 中国科学院项目新疆维吾尔自治区自然科学基金Astronomical Big Data Joint Research Center,cofounded by National Astronomical Observatories,Chinese Academy of Sciences

2022YFF07115022021YFC220350212173077120030622022D140202022TSYCCX0095PTY-Q2022YZZD012022D01A360

2024

10.1088/1674-4527/ad08e8

天文和天体物理学研究
中国科学院国家天文台

天文和天体物理学研究

CSTPCD
影响因子：0.406
ISSN：1674-4527
年,卷(期)：2024.24(1)
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