Transcript 虚拟天文台引领天文学网络化协同工作 - Chinese Virtual Observatory

The Chinese Virtual Observatory
Chenzhou CUI
tional Astronomical Observatories, Chinese Academy of Science
Content
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VO ABC
IVOA & China-VO
LAMOST telescope
e-Science platform for the LAMOST
Jan 25, 2009, CCNU
What is VO
Jan 25, 2009, CCNU
My definition
• Virtual Observatory (VO) is a data-intensively online
astronomical research and education environment, taking
advantages of advanced information technologies to achieve
seamless, global access to astronomical information.
• 虚拟天文台是通过先进的信息技术将全球范围内的研究资源无缝透明
连接在一起形成的数据密集型网络化天文研究与科普教育平台。
• The power of the World Wide Web is its transparency. It is as if
all the documents in the world are inside your PC. The idea of
the Virtual Observatory is to achieve the same transparency for
astronomical data and other related information (Quinn et al.
2004).
Jan 25, 2009, CCNU
World Wide Telescope
Chandra
Whipple g-ray
Oak Ridge
1.2m CO
MMT
SIRTF
Hubble
VLA
Sub-mm array
Antartica sub-mm
Jan 25, 2009, CCNU
Magellan 6.5m
Courtesy of Dr. Jim Gray
Science driven, technic enabled
VO drivers : science
•multi-archive research
•Precision Cosmology
•The Time Domain
•A Panchromatic approach to the Universe…
Jan 25, 2009, CCNU
Science driven, technic enabled
VO drivers : technology
• hardware trends
– ops, storage, bw : all 1000x/decade
– data i/o bw 10x/decade
• data avalanche
– CCD array
– digital sky survey
– numerical simulation
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International Virtual Observatory Alliance
IVOA
• International Virtual Observatory Alliance (IVOA)
• formed in June 2002
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Developing interoperability standards
Enhancing communication
Fostering collaboration
Cultivating VO awareness and usage by the astronomical
community
– Coordinate, prioritise and validate the implementation of
standards, tools and services
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VO framework
• agreed standards
• inter-operable data collections
• inter-operable software modules
• no central VO-command
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IVOA Protocols
key for interoperability
IVOA Documents
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Jan 25, 2009, CCNU
Chinese Virtual Observatory
R&D Focuses
• China-VO Platform
– 中国虚拟天文台系统平台的开发
• Unified Access to On-line Astronomical
Resources and Services
– 国内外天文研究资源的统一访问
• VO-ready Projects and Facilities
– 支持VO的项目与观测设施
• VO-based Astronomical Research Activities
– 基于VO的天文研究示范
• VO-based Public Education
– 基于VO的天文科普教育
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China-VO 2004, Wuhan, Hubei
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IVOA 2007, Beijing
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China-VO 2009 (Chongqing)
• Date: Nov. 26-28, 2009
• Theme: New Round of VO
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Two XSLT transforms
• VOFilter
– an XML filter for OpenOffice.org Calc to open
VOTable files
– http://services.china-vo.org/vofilter/
• VOTable2XHTML
– a stylesheet to transform VOTable data into
HTML/XHTML format
– http://services.china-vo.org/votable2xhtml/
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A Smart On-line Astronomical Information
Collector
• Touch the sky with your mouse
• An intelligent client for VO services
• A commodity for astronomers and
students
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FitHAS: FITS Header Archiving System
Wizard
User Interface
Layer
• An useful assistant tool for
FITS providers and managers
• Importing FITS keyword
records for one or more FITS
files under a given directory
into a database by several
mouse clicks
Header
viewer
Core Transaction
Layer
Header analysis
Jan 25, 2009, CCNU
FITSfiles
files
FITS
FITS
files
Archive
moniter
Database
browser
Metadata Mapping
and Archiving
Configuration
Database
controller
Database
Configuration
files
VO Data Access Service (VO-DAS)
• An OGSA-DAI based service system to provide unified
access to astronomy data, including catalogs, images and
spectra.
• Goals of VO-DAS
– Supporting high volume data query
– Interlinking distributed and heterogeneous archives
• catalogs, images, spectrums
– Providing a software that works for astronomers
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AstroBox
VO Tools
(Aladin, TOPCAT)
PLASTIC
AstroBox
MATLAB
VO-DAS Client
VO-DAS
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MATLAB
Database Toolbox
Java
Libraries
VOTables
• A plug-in package for MATLAB
to provide an astronomical
data mining application service,
supporting VO protocols and
tools.
• A high-level data analysis
environment supporting:
– PLASTIC
– VOTable
– Local DB
– VO-DAS client
– Astronomical algorithms
Local
DB
First Science Paper from China-VO
• Candidate Milky Way satellites in the Galactic halo（Liu et al.,
2008, A&A)
• SDSS DR5 photometric data were searched for new Milky Way
companions or substructures in the Galactic halo.
• Data analysis procedures were based on the VO-DAS.
• Five candidates are identified as over-dense faint stellar
sources that have color-magnitude diagrams similar to those
of known globular clusters, or dwarf spherical galaxies.
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China-VO @ IYA2009
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Goals of the China-VO
Building the cyber-infrastructure
for Astronomy in China
Leading the e-Science
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Infrastructure
• Hardware
– Data center
– HPC
– Storage
• Software
– Organization
• NAOC CIC
– Collaboration
• TJU
• CCNU
• MSR
• KMUST
•…
Jan 25, 2009, CCNU
中国天文开始进入大科学时代
AST3
40-50m 射电望远镜HXMT
CSTAR
云南2.4m
SHAO 65m
WSO
FAST
超导成像频谱仪
21CMA
国家重大科学工程
LAMOST天文望远镜
2009年－－国际天文年
400年来，人类制造的天文望远镜口径越来越大，
从地面发展到空间，从光学波段发展到全部电磁波
段，促进了天文学的巨大发展
伽利略、开普勒：折射望远镜
牛顿：反射望远镜
• 8-10米光学望远镜
施密特：折反射望远镜（大视场）
LAMOST: 主动反射施密特系统
望远镜的特点
口径越大
探测越深
视场小
一次观测到的目标较少：个体类研究－深入细致的观测
视场大
一次观测到的目标越多：巡天类研究－宇宙天体的普查
LAMOST做到既大视场又大口径
——中国天文学家的创新设计理念
主动反射施密特望远镜
4000光纤定位
系统
MA镜: 24
4000光纤
MB镜: 37
16光谱仪
32CCD相机
大视场兼备大口径的突破
 英国剑桥大学天文研究所Willstrop教授（1994年）
2008年10月16日 LAMOST落成
 2008年12月，获得M31星系中发射线天体的光谱
仙女座大星云（M31星系）
距离约256万光年
 2009年4月，单次观测获得3600余条光谱（>97%）
4号光谱仪
5号光谱仪
2009年6月，通过国家验收
4号光谱仪
5号光谱仪
VO-enabled LAMOST
LAMOST网络化协同工作平台
LAMOST Database System
Command Line
Interface
Portal
VO Tools
VO 服务层
图
像
访
问
表
格
访
问
锥
形
检
索
SAMP
光
谱
访
问
交
叉
证
认
文
件
访
问
其
他
服
务
程
序
接
口
个
性
服
务
用
户
接
口
数据库 / 数据文件 访问层
LAMOST
CSTAR
FAST
TMT
LSST
……
SDSS
GSC
……
On-line Collaboration
Online VO Applications
IVOA SAMP
Website Portal
SSO
LAMOST
Database
VO
Resources
Data Access Layer
Duckling Collaboration
Platform
Cyber-Infrastructure
Jan 25, 2009, CCNU