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2002-10-17 • 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 LAMOST 固定球面主镜MB Fixed Spherical Mirror 焦面 Focal Plane 改正镜MA 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) BADC Resources • • • • • • • 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-TaiwanConnecticut ) • SDSS SX will be mirrored as soon as it is available Hardware Environments CPU MEM Capacity NIC Intel P4 1.2GHz×10 1GB×5 80GB+20GB×4+ 1TB×4=4.16TB 100 Mbps D-link Switcher Cost <200, 000 RMB (24, 000 USD) RAID 5 ADS mirror server (8-1) × 80 GB=560 GB • 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 Java Servlet Portal HTTPS Statistic Weband Analyses VO Resource Manager OGSA Service SQL, XQuery Simple Search Web & Mining Discovery Service SkyQuery, AML Advanced Search PHP Processing XML Data VOTable XML Data FITS C++ Processing XML Data JPG Java Processing XML Data … China-VO Characteristics of China-VO Based on core services (Metadata services, Simple search patterns, Simple functions) provided by IVO, we try to realize: • 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 Focusing on Spectrum Automatic Processing and Relevant Technology 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 VO provides opportunities and challenges to 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-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 •2002.7 :Draft of China-VO Architecture. •2002.10:Online access for most collected archives; Join in IVOA. •2003.1 :System requirement analyse and scientific goals definition; Architecture design; Initial web services design. •2003.5 :Initial online access to China-VO •2003.8 :Initial China-VO functional demo •2003.10:VO-oriented LAMOST Data Model (LmstD) 1.0 •2004.1 :China-VO 1.0 •2004.10:LmstD 2.0 •2005.1 :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 http://www.china-vo.org LAMOST http://www.lamost.org Beijing Astronomical Data Center http://badc.lamost.org National Virtual Observatory (US) http://www.us-vo.org