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Transcript
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