JVOの研究開発：全体進捗
データベース国際連携の成功

国立天文台 大石雅寿
masatoshi.ohishi@nao.ac.jp
Mar. 30, 2005

日本天文学会2005年春季年会

1

JVO collaborators
Project Scientists
NAOJ• Mizumoto• Oe• Shirasaki• Tanaka• Honda• Kawanomoto
ICRR• Yasuda
Ochanomizu U.
• Masunaga
Mar. 30, 2005

System Engineers
Fujitsu Ltd.
• Monzen• Kawarai• Ishihara• Yamazaki

SEC Ltd.
• Morita• Nakamoto• Kobayashi• Yoshida

SupporterNII•Miura日本天文学会2005年春季年会

2Mar. 30, 2005

日本天文学会2005年春季年会

3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
Mar. 30, 2005

日本天文学会2005年春季年会

4

VO Projects in the world• 15 countries and a region• International Virtual Observatory Alliance (IVOA)
Standards to interoperate VOs• Japan – Language to accessfederated DB
http://www.ivoa.net/Mar. 30, 2005

日本天文学会2005年春季年会

5

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
• etcMar. 30, 2005

日本天文学会2005年春季年会

6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
issuesMar. 30, 2005

日本天文学会2005年春季年会

7Schematic diagram of JVO

Mar. 30, 2005

日本天文学会2005年春季年会

8DBs available under JVO• Subaru SupCAM (partial)• SXDS• SMOKA (catalog)• SDSS• 2MASS• JAXA/ISAS – ASCA
• More to comeMar. 30, 2005

日本天文学会2005年春季年会

9

Exchange of Meta Data:OAI-PMH

Mar. 30, 2005

日本天文学会2005年春季年会

10

Successful Interoperations• Accesses from / toother VOs in Europe
and US have been
available since Dec2004• 85 resources areaccessible as of today

Mar. 30, 2005

日本天文学会2005年春季年会

11

JVO is seen from the UK VO

Mar. 30, 2005

日本天文学会2005年春季年会

12Access time to the US VO

Mar. 30, 2005

日本天文学会2005年春季年会

13Analysis Tools• Sextractor – extract source parameters
generate personal catalogs• HyperZ – derive photometric Z• Aladin – Image viewer• VOPlot – Plot VOTables• SpecView – SED generator• More to be added– Legacy softwares, Data mining, personal DBs, etc.
Mar. 30, 2005

日本天文学会2005年春季年会

14

QSO searches

Mar. 30, 2005

日本天文学会2005年春季年会

15Science results (EU)• Padovani et al.
(2004))
demonstrates that
VO tools are mature
enough to produce
cutting-edge science
results by exploiting
astronomical data
beyond classicalidentification limits
 25)
Mar.(R30, 2005
日本天文学会2005年春季年会

16Science results (US)• McGlynn et al. (2004)
classified all unidentified
ROSAT WGACAT
objects using VO data
access methods tocross-correlate multiwavelength catalogs– Technique applied to findcandidate X-ray binaries
and now to SDSS
photometric catalog• More than 400 papers
related to “virtualin ADS
Mar.observatory”
30, 2005
日本天文学会2005年春季年会

17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– ････
Mar. 30, 2005

日本天文学会2005年春季年会

18

Acknowledgement• 日本学術振興会 先端研究拠点事業• 科研費 特定領域研究「情報学」• 国立天文台– 研究費も含めてMar. 30, 2005

日本天文学会2005年春季年会

19