Brief Introduction of LAMOST Brief Introduction of BADC Virtual Observatory of China VO-oriented LAMOST

LAMOST MAIN CHARACTERISTICS 有效通光孔径 (Clear aperture): 4m 视场角直径 (Field of view): 5° 焦面线直径 (Focal plane): 1.75m 焦距 (Focal length): 20m 光纤数 (Number of fibers): 4000 光谱覆盖范围 (Spectral range): 370 ～ 900nm 光谱分辨率 (Spectral resolution):1 ～ 0.25nm 观测天区 (Sky coverage): Declination -10  to +90 

固定球面主镜 M B Fixed Spherical Mirror 焦面 Focal Plane 改正镜 M A Corrector Mirror 光纤 Fiber Optics 光谱仪 Spectroscopies LAMOST

Scientific aims : Extra-galactic spectroscopic survey — Large scale structure of the universe Stellar spectroscopic survey — Structure of the Galaxy Cross identification of multi-waveband surveys —Virtual Observatory LAMOST 星系红移巡天 样品空间分布图 （数值模拟结果） Sample space distribution of the LAMOST galaxy survey (numerical simulation results)

Brief Introduction of LAMOST Brief Introduction of BADC Virtual Observatory of China VO-oriented LAMOST

World Data Center for Astronomy Beijing Astronomical Data Center (BADC)

CDS/ADC catalogs USNO-A1.0 USNO-A2.0 Hipparcos/Tycho catalogs RealSky atlas DSS DSS-II Einstein X-ray archives ROSAT X-ray archives NASA/ADS mirror Astronomy Yellow page Software warehouse 2MASS BATC (Beijing-Arizona-Taiwan- Connecticut ) BADC Resources SDSS SX will be mirrored as soon as it is available

CPUMEMCapacityNIC Intel P4 1.2GHz×10 1GB×580GB+20GB×4+1 TB×4= 4.16TB 100 Mbps D-link Switcher Cost<200, 000 RMB (24, 000 USD) ADS mirror server (8-1) × 80 GB=560 GB RAID 5 Hardware Environments

Brief Introduction of LAMOST Brief Introduction of BADC Virtual Observatory of China VO-oriented LAMOST

China-VO The Advantages of Building China-VO Acquire data and technologies from other IVOA partners Share our data (LAMOST, SST, FAST, BATC …) with international astronomers Provide a convenient portal for native users accessing national and international archives Bring up a group of VO-oriented astronomers, engineers and students Education outreach

China-VO Data Processing Simple SearchAdvanced Search Mining & Discovery Statistic and Analyses VO Resource Manager Portal Java Servlet HTTPS OGSA XML VOTable XML FITS XML JPG XML … PHP C++Java SQL, XQuerySkyQuery, AMLWeb Service Web Service

China-VO Characteristics of China-VO Focusing on Spectrum Automatic Processing and Relevant Technology Automatic processing for multi-fiber spectrum data Spectrum line automatic extraction Automatic classification of Spectrum data Redshift measurement Cross-identification between spectrum data and other data Visualization Based on core services (Metadata services, Simple search patterns, Simple functions) provided by IVO, we try to realize:

China-VO Current Partners Department of Astronomy, Beijing Univ. Beijing Astrophysical Center, CAS-PKU Astrophysical Center, Tsinghua Univ. Supercomputing Center, CAS Institute of Computing Technology, CAS

Brief Introduction of LAMOST Brief Introduction of BADC Virtual Observatory of China VO-oriented LAMOST

VO-LAMOST LAMOST will select observing objects from VO Multi waveband sky survey archives, i.e. FIRST, NVSS, 2MASS, IRSA, SDSS, POSS… LAMOST will enhance astronomical spectrum resources greatly with its output LAMOST vs. SDSS = 4000 : 600 VO provides opportunities and challenges to LAMOST

VO-LAMOST Just from the beginning: VO-oriented LAMOST metadata model VO-oriented LAMOST data model VO-oriented Atomic services and toolkits Preserve metadata as much as possible

Roadmap for China-VO ： Draft of China-VO Architecture ： Online access for most collected archives; Join in IVOA ： System requirement analyse and scientific goals definition; Architecture design; Initial web services design ： Initial online access to China-VO ： Initial China-VO functional demo ： VO-oriented LAMOST Data Model (LmstD) ： China-VO ： LmstD ： China-VO 2.0

Now, We urgent need: Experts in data-based computing Astronomy Attendees with skills of: XML, OGSA, Java, Database Cooperation National and International Money

References and Links China-VO LAMOST Beijing Astronomical Data Center National Virtual Observatory (US)