Construction of Virtual Observatories
through Global Collaboration andStandardization
Masatoshi Ohishi / NAOJ & Sokendai
大石雅寿 / 国立天文台 & 総合研究大学院大学
masatoshi.ohishi@nao.ac.jp

June 20, 2007

UN Basic Space Science Ws

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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• VSOPSubaru• VERA• ALMA

June 20, 2007

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Data Resources in the World• ESO VLT @ Paranal• ESO telescopes @ La Silla• Telescopes in Mauna Kea
Subaru, Keck, JCMT, CSO, SMA,,,• Telescopes on board satellites
HST, GALEX,,,,

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Too hard to collect andanalyze whole data.
Need Cat’s help

Data Rate

Accelerate astronomicalresearch, and sufficient
time for research itself !! Virtual Observatory

June 20, 2007

Nobeyam Radio Obs.

~ 1 TB/yr

SUBARU telescope~ 20 TB/yr

ALMA~ 1 PB/yr

Even for educational use

UN Basic Space ScienceWsAccessible
from anywhereat any time4VO– New Research Infrastructurein the 21st Century
A collection of integrated
astronomical data archives andsoftware tools that utilize
computer networks to create anenvironment in which research
can be conducted.
http://www.encyclopedia.com/html/v1/virtobserv.asp
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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
issuesJune 20, 2007

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VO Projects in the world• 15 countries and a region (EU)• International Virtual Observatory Alliance (IVOA)
Standards to interoperate VOs

http://www.ivoa.net/

June 20, 2007

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8Standardization in IVOA
• Query Language to Federated DBs (VOQL)• Access resource meta-data based on theOAI-PMH• Access Images, Spectra, Catalogues, etc：
SkyNode, SIAP, SSAP, STC, etc.
• Unified Attribute Names：
UCD (Unified Contents Descriptions)• Output format：VOTable (XML)• and so on
June 20, 2007

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IVOA Interoperability WS• Twice a year
• Discussions
towardstandardization• Humannetwork as abasis for cybernetworkJune 20, 2007

UN Basic Space Science Ws

11Overview of the JVO Portal Service
LDAP解析
解析
解析
Analysis
Servers

GridSystemAuth.

JVO

SDSS

InvokeMDS

PortalSkyNode
1.0…

Web Service
HTTP Get
FTP
LDAP
P. Reg.
June 20, 2007

UserStorage

QSO
Subaru2MASSData Service

S. Reg.

Other VOs
Registry
UN Basic Space Science Ws

P. Reg.

SIAP/SSAP

SkyNode0.7.4 12Interconnected VO Data services inthe World

Canada VO

China VO

600+ Data Resources are accessible
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Log(F_IR)

MAG_B

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Spectral Data from Subaru• queries• display• Baselineestimate• Linedetection
High Dispersion Spectrometer

June 20, 2007

UN Basic Space Science Ws• VOSpec

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Improvement of Work Flow system
Items in FY2006• Improvement of WFDL
– Shorten the volume of DL– Array definition– Awk-like description (loopdescription in a single line)– and so on

WF Editor• Built-in functions– Available to register anduse built-in functions

Execution monitor• Status and Log system

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– Reduction 10s(Bias+Flat+Distortion+Astrometory)– Transfer 30s

June 20, 2007Data Reduction:~24 hours Æ ~1 hour
UN Basic Space Science Ws

17Software Tool providers• VO-China– VOFilter : VOTable Æ
OpenOffice data– VOIMPAT : Image
processing andanalysis tool– ,,,• VO-India– VO-Plot: to plot
contents in VOTable– ,,,June 20, 2007

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Discovery of a Brown Dwarf：
SDSS/2MASS (US VO)
discoveries likethis much easier if
databases jointly
queryable

June 20, 2007

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Detection of MANY Type II Quasars(EURO-VO)

June 20, 2007

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Study on Environment around QSOs
(Japan VO)

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New Moves• Some VO projects move from R&D phase
to operations phase– UK, Japan, US, EU,,,• New VO projects– Brazil, Chinese Taipei, Blugaria, Tagikistan,
Ireland, Czech, Argentine,,,June 20, 2007

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Items to be done
• Distributed Storage to store query/analysis
results• Secure access to VOs : single-sign-on• Other Standardizations– Standard application interface• Advertisement to Data Centers– data centers need implement VO interfaces• VO schools for astronomers
June 20, 2007

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24http://www.ivoa.net/
Contact Persons:Francoise Genova (CDS) – chair
Dave de Jong (NOAO) – vice chair

M.Ohishi (NAOJ)-- ex-chair

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