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

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

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

CPU MEM Capacity NIC

Intel P4 1.2GHz×10

1GB×5 80GB+20GB×4+1TB×4=4.16TB

100 MbpsD-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 Data Data Data

Processing

ProcessingProcessing

Simple Search Advanced Search

Mining & Discovery

Statistic and AnalysesVO Resource

Manager

PortalJava Servlet HTTPS

OGSA

XMLVOTable

XMLFITS

XMLJPG

XML…

PHP

C++ Java

SQL, XQuery SkyQuery, AML

WebService

WebService

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

•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