hailong zhang, Jie WANG, Xinchen YE, Wanqiong WANG, Jia LI, Zhang Yazhou, Xu Du, Han Wu, Ting ZHANG
{"title":"A Cross-matching Service for Data Center of Xinjiang Astronomical Observatory","authors":"hailong zhang, Jie WANG, Xinchen YE, Wanqiong WANG, Jia LI, Zhang Yazhou, Xu Du, Han Wu, Ting ZHANG","doi":"10.1088/1674-4527/ad08e8","DOIUrl":null,"url":null,"abstract":"Abstract 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 (XAO-DC). Specifically, we use Q3C (Quad Tree Cube) to divide the spherical blocks of celestial object and map the 2-D space composed of Right Ascension (RA) and Declination (Dec) to 1-D 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.","PeriodicalId":54494,"journal":{"name":"Research in Astronomy and Astrophysics","volume":"18 S6","pages":"0"},"PeriodicalIF":1.8000,"publicationDate":"2023-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Research in Astronomy and Astrophysics","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1088/1674-4527/ad08e8","RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"ASTRONOMY & ASTROPHYSICS","Score":null,"Total":0}
引用次数: 0
Abstract
Abstract 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 (XAO-DC). Specifically, we use Q3C (Quad Tree Cube) to divide the spherical blocks of celestial object and map the 2-D space composed of Right Ascension (RA) and Declination (Dec) to 1-D 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.
期刊介绍:
Research in Astronomy and Astrophysics (RAA) is an international journal publishing original research papers and reviews across all branches of astronomy and astrophysics, with a particular interest in the following topics:
-large-scale structure of universe formation and evolution of galaxies-
high-energy and cataclysmic processes in astrophysics-
formation and evolution of stars-
astrogeodynamics-
solar magnetic activity and heliogeospace environments-
dynamics of celestial bodies in the solar system and artificial bodies-
space observation and exploration-
new astronomical techniques and methods