Virtual Observatories Integration of Astronomical Data

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Virtual ObservatoriesIntegration of Astronomical
Data Analyses tools

• Masatoshi Ohishi / NAOJ Sokendai
• ???? / ????? ?????????
• masatoshi.ohishi_at_nao.ac.jp

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Data Resources in NAOJ

• Subaru 8.2m Optical-Infrared Telescope
• Kiso 105cm Schmidt Camera
• Okayama 188cm Optical Telescope
• Nobeyama 45m Radio Telescope
• Nobeyama Millimeter Array
• Nobeyama Radioheliograph
• VSOP
• VERA
• ALMA

Nobeyama 45m
Subaru
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VO Projects in the world

• 17 countries and a region
• International Virtual Observatory Alliance
  (IVOA)Standards to interoperate VOs
• http//www.ivoa.net/

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Standardization in IVOA

• Query Language to Federated DBs (VOQL)
• Access resource meta-data based on the OAI-PMH
• Access Images, Spectra, Catalogues, etc
  SkyNode, SIAP, SSAP, STC, etc.
• Unified Attribute Names UCD (Unified Contents
  Descriptions)
• Output formatVOTable (XML)
• and so on

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IVOA Interoperability WS in Kyoto

• 2005 May
• 90 people
• About 20 countries including China, Korea and
  Taiwan
• Supported by JSPS

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Schematic diagram of VOs
SIAP/SSAP/SkyNode
US/CAN
SIAP/SSAP/SkyNode
Europe
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Exchange of Meta DataOAI-PMH
Searchable Registry
Publishing Registry
Publishing Registry
Query Services
Access to various services
Data Service
Analysis Service
Virtual Observatory Client
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Successful Interoperations

• Accesses from / to other VOs in Europe and US
  have been available since Dec 2004
• Publishing Searchable Registries
• 140 resources are accessible as of today

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Interconnected VOs in the World
Canada VO
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Integration of standard protocols
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Workflow Description Language

• Based on BPEL4WS
• Variable definition
• Controls (Loop, Condition)
• Parallel execution
• Invoke external services
• Invoke built-in Java Classes

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Management of Multiple Servers

• Data Analysis services under JVO
• SExtractor (Image ? Catalog)
• HyperZ (Catalog ? photometric redshift)
• In operation on multiple servers ?
  Monitor and Discovery Service (MDS) server

MDS Server
JVO Portal
Analysis Servers
of Jobs CPU load Job status
Service Request
Execute
Available Server Info
Confirm Job Completion
Analysis Server Management Data
Job Completion Info
Job submission
Client
Results
Parallel Executions on Multiple Servers are
available
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Discovery of a Brown DwarfSDSS/2MASS
discoveries like this much easier if databases
jointly queryable
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Detection of MANY Type II Quasars
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International Endorsements

• IAU XXVth GA Res. (2003 Jul.)
• OECD Rec. (04 Aug)
• place archives that may be accessible via
  internet
• provide adequate funding as long-term issues

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Reference URLs

• JVO http//jvo.nao.ac.jp/index-e.html
• IVOA http//www.ivoa.net/
• there are links to other VO projects in the
  world