Transcript Development of JVO prototype system

Recent Progress of the Japanese
Virtual Observatory Project
Masatoshi Ohishi / NAOJ
大石雅寿 / 国立天文台
[email protected]
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JVO collaborators
Project Scientists
NAOJ
• Mizumoto
• Oe
• Shirasaki
• Tanaka
• Honda
• Kawanomoto
ICRR
• Yasuda
Ochanomizu U.
• Masunaga
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System Engineers
Fujitsu Ltd.
• Monzen
• Kawarai
• Ishihara
• Yamazaki
SEC Ltd.
• Morita
• Nakamoto
• Kobayashi
• Yoshida
Supporter
NII
•Miura
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Nature of Astronomers
• Much higher sensitivity
→ more distant objects
• New frequencies / wavelength
→ unknown aspects
• Wider areas
→ statistical studies
• WE NEED MORE DATA !!
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Data Resources in NAOJ
• Subaru 8.2m Optical-Infrared Telescope
• Kiso 105cm Schmidt Camera
Nobeyama 45m
• Okayama 188cm Optical Telescope
• Nobeyama 45m Radio Telescope
• Nobeyama Millimeter Array
• Nobeyama Radioheliograph
• VSOP
Subaru
• VERA
• ALMA
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Data Resources in JAXA/ISAS
• ASCA X-ray astronomy satellite
• YOHKO solar physics satellite
• Ginga X-ray astronomy satellite
• HALCA VLBI satellite
• Geotail geomagnetosphere satellite
ASCA
• Akebono aurora observation satellite
• ASTRO-F Infrared satellite
• ASTRO-E2 X-ray satellite
YOHKO
• SOLAR-B
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HALCA
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Simple Spectrum Access
Image / Spectrum / Catalog
interoperability
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What is the Virtual Observatory…
and what it is not…
The VO is:
• A set of international standards to share complex data
• A modular set of tools to work with distributed data
• A simple environment to publish data to
• An essential part of the research astronomer’s toolkit
• A catalyst for world-wide access to astronomical archives
• A vehicle for education and public outreach
The VO is not:
• A replacement for building new telescopes and instruments
• A centralized repository for data
• A data quality enforcement organization
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VO Projects in the world
• 15 countries and a region
• International Virtual Observatory Alliance (IVOA)
Standards to interoperate VOs
• Japan – Language to access
federated DB
http://www.ivoa.net/
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Standardization in IVOA
• Query language to distributed DBs (VOQL)
• Meta-data：contents, protocol to interchange
based on OAI-PMH
• Protocols to retrieve images, spectra, and so on
SkyNode, SIAP, SSAP, STC, etc.
• Unified attribute names in DBs
UCD (Unified Contents Descriptions)
• Output Format：VOTable (XML)
incorporates FITS
• etc
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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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Schematic diagram of JVO
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DBs available under JVO
• Subaru SupCAM (partial)
• SXDS
• SMOKA (catalog)
• SDSS
• 2MASS
• JAXA/ISAS – ASCA
– More to come
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Exchange of Meta Data:OAI-PMH
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Successful Interoperations
• Accesses from / to
other VOs in Europe
and US have been
available since Dec
2004
• 85 resources are
accessible as of today
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JVO is seen from the UK VO
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Access time to the US VO
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Analysis Tools
• Sextractor – extract source parameters
generate personal catalogs
• HyperZ – derive photometric Z
• Aladin – Image viewer
• VOPlot – Plot VOTables
• SpecView – Spectral Energy Distribution
generator
• More to be added
– Legacy softwares, Data mining, personal DBs, etc.
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QSO searches
Such results
can be obtained
only in a few
minutes
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Future Prospects
Start to design / implement operational system
– Upgrade user-interfaces
– Add spectrum data
– Add analysis engines by Java-wrapping
– Download to / Upload from user machines
– Science corresponding to use cases !!
– Design workflows
– ････
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Acknowledgement
• Core-to-Core Program of the JSPS
• Grant-in-Aid by the MEXT
• NAOJ
– funding, personnel, etc.
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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
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