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1. chinaXiv:201611.00866 [pdf]

Update of the China-VO AstroCloud

Chenzhou Cui; Ce Yu; Jian Xiao; Boliang He; Changhua Li; Dongwei Fan; Chuanjun Wang; Zhi Hong; Shanshan Li; Linying Mi; Wanghui Wan1; Zihuang Cao; Jiawei Wang; Shucheng Yin; Yufeng Fan; Jianguo Wang; Sisi Yang; Yin Ling; Hailong Zhang; Junyi Chen
分类: 天文学 >> 天文学

As the cyber-infrastructure for Astronomical research from Chinese Virtual Observatory (China-VO) project, AstroCloud has been archived solid progresses during the last one year. Proposal management system and data access system are redesigned. Several new sub-systems are developed, including China-VO PaperData, AstroCloud Statics and Public channel. More data sets and application environments are integrated into the platform. LAMOST DR1, the largest astronomical spectrum archive was released to the public using the platform. The latest progresses will be introduced.

提交时间: 2016-11-16 点击量2497下载量328 评论 0

2. chinaXiv:201611.00865 [pdf]

The LAMOST Data Archive and Data Release

Boliang He; Dongwei Fan; Chenzhou Cui; Shanshan Li; Changhua Li; Linying Mi
分类: 天文学 >> 天文学

The Large sky Area Multi-Object Fiber Spectroscopic Telescope (LAMOST) is the largest optical telescope in China. In last four years, the LAMOST telescope has published four editions data (pilot data release, data release 1, data release 2 and data release 3). To archive and release these data (raw data, catalog, spectrum etc),we have set up a data cycle management system, including the transfer of data, archiving,backup. And through the evolution of four software versions, mature established data release system.

提交时间: 2016-11-16 点击量2789下载量262 评论 0

3. chinaXiv:201611.00860 [pdf]

Efficient Catalog Matching with Dropout Detection

Dongwei Fan; Tam碼s Budav碼ri; Alexander S. Szalay; Chenzhou Cui; Yongheng Zhao
分类: 天文学 >> 天文学

Not only source catalogs are extracted from astronomy observations. Their sky coverage is always carefully recorded and used in statistical analyses, such as correlation and luminosity function studies. Here we present a novel method for catalog matching, which inherently builds on the coverage information for better performance and completeness. A modified version of the Zones Algorithm is in-troduced for matching partially overlapping observations, where irrelevant parts of the data are excluded up front for efficiency. Our design enables searches to focus on specific areas on the sky to further speed up the process. Another im-portant advantage of the new method over traditional techniques is its ability to quickly detect dropouts, i.e., the missing components that are in the observed regions of the celestial sphere but did not reach the detection limit in some observations. These often provide invaluable insight into the spectral energy dis-tribution of the matched sources but rarely available in traditional associations.

提交时间: 2016-11-15 点击量2930下载量285 评论 0

4. chinaXiv:201605.00848 [pdf]

Enhanced management of personal astronomical data with FITSManager

Chenzhou Cui; Dongwei Fan
分类: 天文学 >> 天文仪器与技术

Although the roles of data centers and computing centers are becoming more and more important, and on-line research is becoming the mainstream for astronomy, individual research based on locally hosted data is still very common. With the increase of personal storage capacity, it is easy to find hundreds to thousands of FITS files in the personal computer of an astrophysicist. Because Flexible Image Transport System (FITS) is a professional data format initiated by astronomers and used mainly in the small community, data management toolkits for FITS files are very few. Astronomers need a powerful tool to help them manage their local astronomical data. Although Virtual Observatory (VO) is a network oriented astronomical research environment, its applications and related technologies provide useful solutions to enhance the management and utilization of astronomical data hosted in an astronomer’s personal computer. FITSManager is such a tool to provide astronomers an efficient management and utilization of their local data, bringing VO to astronomers in a seamless and transparent way. FITSManager provides fruitful functions for FITS file management, like thumbnail, preview, type dependent icons, header keyword indexing and search, collaborated working with other tools and on-line services, and so on. The development of the FITSManager is an effort to fill the gap between management and analysis of astronomical data.

提交时间: 2016-05-05 点击量477下载量313 评论 0

5. chinaXiv:201604.00963 [pdf]

AstroCloud, a Cyber-Infrastructure for Astronomy Research: Data Archiving and Quality Control

Boliang He; Chenzhou Cui; Dongwei Fan
分类: 天文学 >> 天文仪器与技术

AstroCloud is a cyber-Infrastructure for Astronomy Research initiated by Chinese Virtual Observatory (China-VO) under funding support from NDRC (National Development and Reform commission) and CAS (Chinese Academy of Sciences)1(Cui et al. 2014). To archive the astronomical data in China, we present the implementation of the astronomical data archiving system (ADAS). Data archiving and quality control are the infrastructure for the AstroCloud. Throughout the data of the entire life cy- cle, data archiving system standardized data, transferring data, logging observational data, archiving ambient data, And storing these data and metadata in database. Quality control covers the whole process and all aspects of data archiving.

提交时间: 2016-04-27 点击量545下载量358 评论 0

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