2002 10 17 Brief Introduction of LAMOST Brief
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): 4 m 视场角直径 (Field of view): 5° 焦面线直径 (Focal plane): 1. 75 m 焦距 (Focal length): 20 m 光纤数 (Number of fibers): 4000 光谱覆盖范围 (Spectral range): 370~ 900 nm 光谱分辨率 (Spectral resolution): 1~ 0. 25 nm 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-A 1. 0 USNO-A 2. 0 Hipparcos/Tycho catalogs Real. Sky atlas DSS-II • • Einstein X-ray archives ROSAT X-ray archives NASA/ADS mirror Astronomy Yellow page Softwarehouse 2 MASS BATC (Beijing-Arizona-Taiwan. Connecticut ) • SDSS SX will be mirrored as soon as it is available
Hardware Environments CPU MEM Capacity NIC Intel P 4 1. 2 GHz× 10 1 GB× 5 80 GB+20 GB× 4+1 TB× 4=4. 16 TB 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 Sky. Query, 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 will select observing objects from VO ü Multi waveband sky survey archives, i. e. FIRST, NVSS, 2 MASS, IRSA , SDSS, POSS… LAMOST will enhance astronomical spectrum resources greatly with its output ü 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 (Lmst. D) 1. 0 • 2004. 1 :China-VO 1. 0 • 2004. 10:Lmst. D 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
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