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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
Subjects: Astronomy >> Astrophysical processes

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the cyber-infrastructure for Astronomical research from Chinese Virtual Observatory (China-VO) project, AstroCloud has been archived solid progresses during the last one year.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.

submitted time 2016-11-16 Hits6894Downloads674 Comment 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
Subjects: Astronomy >> Astrophysical processes

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.

submitted time 2016-11-16 Hits5342Downloads555 Comment 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
Subjects: Astronomy >> Astrophysical processes

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.

submitted time 2016-11-15 Hits7590Downloads591 Comment 0

4. chinaXiv:201605.00848 [pdf]

Enhanced management of personal astronomical data with FITSManager

Chenzhou Cui; Dongwei Fan
Subjects: Astronomy >> Astronomical Instruments and Techniques

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.

submitted time 2016-05-05 Hits1122Downloads632 Comment 0

5. chinaXiv:201604.00964 [pdf]

AstroCloud, a Cyber-Infrastructure for Astronomy Research: Overview

Chenzhou Cui; Ce Yu; Jian Xiao; Boliang He
Subjects: Astronomy >> Astronomical Instruments and Techniques

AstroCloud is a cyber-Infrastructure for Astronomy Research initiated by Chinese Virtual Observatory (China-VO) under funding support from NDRC (Na- tional Development and Reform commission) and CAS (Chinese Academy of Sci- ences). Tasks such as proposal submission, proposal peer-review, data archiving, data quality control, data release and open access, Cloud based data processing and analyz- ing, will be all supported on the platform. It will act as a full lifecycle management system for astronomical data and telescopes. Achievements from international Virtual Observatories and Cloud Computing are adopted heavily. In this paper, backgrounds of the project, key features of the system, and latest progresses are introduced.

submitted time 2016-04-27 Hits1365Downloads690 Comment 0

6. chinaXiv:201604.00963 [pdf]

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

Boliang He; Chenzhou Cui; Dongwei Fan
Subjects: Astronomy >> Astronomical Instruments and Techniques

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.

submitted time 2016-04-27 Hits1105Downloads614 Comment 0

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