China-VO and LAMOST Database Chenzhou CUI NAOC, CAS

Chinese Virtual Observatory

KIAA-Cambridge Workshop

st VO workshop in China “China-VO” kicked off “China-VO” became a member of the IVOA the 2nd VO workshop IVOA Small Projects Meeting VOFilter 1.0 released China-VO China-VO China-VO IVOA interoperability meeting China-VO China-VO 2008 History and Events

KIAA-Cambridge Workshop

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

KIAA-Cambridge Workshop Two XSLT transforms  VOFilter  an XML filter for OpenOffice.org Calc to open VOTable files   VOTable2XHTML  a stylesheet to transform VOTable data into HTML/XHTML format 

KIAA-Cambridge Workshop  Touch the sky with your mouse  An intelligent client for VO services  A commodity for astronomers and students A Smart On-line Astronomical Information Collector

KIAA-Cambridge Workshop FitHAS: FITS Header Archiving System  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

KIAA-Cambridge Workshop 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 works for astronomers  Providing a software that works for astronomers

KIAA-Cambridge Workshop AstroBox  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 VO-DAS MATLAB VO-DAS Client MATLAB Database Toolbox Local DB Java Libraries VOTables PLASTIC VO Tools (Aladin, TOPCAT) AstroBox

KIAA-Cambridge Workshop 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.

KIAA-Cambridge Workshop Goals of the China-VO Building the cyber-infrastructure Leading the e-Science for Astronomy in China

KIAA-Cambridge Workshop VO-enabled LAMOST  VO-enabled  LAMOST data  LAMOST Spectral Analysis Pipeline

LAMOST Database

KIAA-Cambridge Workshop SDSS Mirror

KIAA-Cambridge Workshop LAMOST Obs. Mode and Data Size  4000 / 250 => 16 spectroscopes => red & blue parts =>32 CCD cameras => 4K*4K pixels => 16 bits color deep  For each sky area, 3 times exposure, 30 minutes each. 5 sky area (plate) can be observed for a night (7.5~9 hours)  Scientific data per night:  4K*4K*2*32*5*3= (GB)  All the collected data is about 20 GB/night  20*200= 4,000 GB per year (ideal condition)  4*5 year = 20 TB for the LAMOST 5 years life period

KIAA-Cambridge Workshop Data Products  2-D multi-fiber spectrum images (pravite)  1-D spectra (to the public 18 months later)  Catalogs (to the public 24 months later)  No image (in principle)

KIAA-Cambridge Workshop LAMOST Dataflow

KIAA-Cambridge Workshop DB components  Tables  scientific data tables  metadata tables  log tables  admin tables  ID System  Global unique targetID  sourceID: source catalog ID, for “SDSS” it is “SDSS”, for “GSC 2.3” it is “GSC23”, etc.  sourceTargetID: the original ID for a source in the source catalog  targetID: a unique ID for each object of LAMOST observation  plateID: telescope pointing ID, i.e. sky area ID  runID: exposure ID  obsID: observation ID, an observation comprises one plate and multiple exposure  spectrographID: spectrograph ID  chipID: CCD chip ID  fiberID: fiber ID

KIAA-Cambridge Workshop Scientific Data Tables

KIAA-Cambridge Workshop Metadata Tables

KIAA-Cambridge Workshop Archive platform and interfaces  Open Source System  LAMP (Linux+Apache/Tomcat+MySQL+PHP)  Java  Perl/C/Python  Web Browser Interface  VO service interface  TAP  SSA  SIA

KIAA-Cambridge Workshop

LAMOST archive management  VOSpace+iRODS based data management system  VO compliant  VOTable  TAP(coneSearch)  SAMP (PLASTIC)  UCD  SSA  STC (WCS)  RM  VOSpace  FootPrint  ADQL  GoogleSky&WWT (KML)

KIAA-Cambridge Workshop

AstroGrid DSA

KIAA-Cambridge Workshop On-line Collaboration Environments  User & Group management  Data access  Proposal preparation  Call for collaborators  Mailing lists & Forums  Data & Docs Share

KIAA-Cambridge Workshop Q & A ? More information is available at: