Japanese%20Virtual%20Observatory%20Project

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Japanese Virtual ObservatoryProject

• Masatoshi Ohishi
• National Astronomical Observatory of Japan
• and Sokendai
• masatoshi.ohishi_at_nao.ac.jp

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Collaborators

• Fujitsu Ltd.
• K. Monzen
• K. Kawarai
• Y. Ishihara
• H. Yanaka
• Y. Yamaguchi
• M. Ishida
• N. Saito
• K. Abe
• J. Tsutsumi
• H. Nakamoto
• Y. Morita

• NAOJ
• Y. Mizumoto
• N. Yasuda
• Y. Shirasaki
• M. Tanaka
• S. Honda
• Ochanomizu U.
• Y. Masunaga
• Osaka U.
• S. Shimojo his team
• Titech
• S. Matsuoka his team

Ken Miura
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Large Telescopes of NAOJ

• Subaru (optical Infrared) _at_ Hawaii
• Nobeyama (Radio)
• single dish f 45-m
• interferometer 6 x f 10-m
• solar interferometer 84 x f 75-cm
• HALCA in orbit f 8-m

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Subaru
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Subaru Telescope (optical IR)
8.3-m mirror
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5000 Galaxies !!
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45m Radio Telescope
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HALCA VLBI Space Observatory Programme
VSOP
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JAXA is going to join JVO !!
Infrared Satellite by JAXA
Launch 2005 ?
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Data Productivity

• Nobeyama Radio 1TB/yr
• Subaru_at_Hawaii 20TB/yr
• ALMA(planned) PB/yr
• Flood of excellent data (survey data)
• Digitized Archived

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Unknowns of Astronomy

• Physics just after the Big Bang ?
• How Galaxies were formed ?
• Averaged density of the Universe
• etc.
• ? statistical analyses for homogeneous survey
  data are crucial

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The Nature of Astronomers

• Higher sensitivity !
• More Data !
• Wider Area !
• Multi Wavelength Data !

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HPC High Speed NETWORK

• GRID Technology
• ? it is possible to federate multi-wavelength-DB
  s and computing facilities for data analyses
• ? Virtual Observatory

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10 Gbps
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JVO prototype Ver. 1

• To establish seamless access to federated DBs by
  using the Grid technology
• To define JVO Query Language, and to implement
  its parser

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Queries for Astronomical Data

• Need to consider the following items
• Searches on Spherical Coordinate
• ? 1 deg west of longitude 0 is longitude 359
  deg !
• Difference of spatial resolutions
• Pointing accuracy of telescope

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Astronomical Data

• Image
• Spectrum
• Photon count
• Light curves
• etc.

• Catalogue
• source position,
• size, brightness,
• other parameters

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JVO QL for Federated DBs
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User Interfaces

• Need to know about SQL to use JVOQL
• ?
• An editor to create JVOQL from GUI
• Editable on screen
• ? more flexibility for advanced users

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Development of Prototype2

• For preparation of Operational System
• User registration single sign-on
• User area over Firewall GSI-SFS
• Adoption of GT3
• Implementation of several analysis tools

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• JVOQL editor
• DB search by resource finder
• UCD finder
• Name Resolver
• Execution Monitor

• User Registration
• User Authentication

User Interface

• VOTable Viewer
• Plotter
• Image Data Viewer
• Spectrum Data Viewer
• Overlay of Muti-catalogs
• Overlay of muti-wavelength images

User athentication
Data Display
Query interface
JSP
JSP
JSP

• DB search by resource finder

JSP
JSP
DB Navigator
Servlet
JVO System
Analysis Execution Status
Query Instruction (JVOQL)
Query Execution Status
Analysis Instruction
DB metadata query
Status cofirmation
Status confirmation
Query Results (XML)
Query script (XPath)
Controller JB
Controller JB
Grid service
JVOQL
Parsed JVOQL
Scheduler JB
JVOQL Parser JB
Data transfer by GSI-SFS
Registry (XMLDB)
Obs. Instruction
Data Transfer by GSI-SFS
Parsed JVOQL, results
Executor JB
Scheduler JB
results
Obs. Instruct.
OAI-PMH
Query Order
Results sent by SOAP
Executor JB
Query Order
Results sent by SOAP
Query Order
Results sent by SOAP
DBAnalysis
OAI-PMH
Grid service
GridFTP
GridFTP
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Resource Meta Data
Catalog?Table Resource?column metadata
?????? Column Resource ????? metadata ?????(???)
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Comparison of two Prototypes
Prototype 1 Prototype 2
toolkit Globus tk 2 Globus tk 3
Services used GRAM GridFTP Grid Services RFT
registry UDDI XMLDB
Commu. overhead 20 30 sec 30 msec
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A Scientific Target on Prototype 2

• Search for Gravitational lenses created by Cosmic
  Strings

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Cosmic Strings?

• Theoretical origin of the elementary particles
  which existed (?) at t 10-35 s,T 1015 GeV
• Not a POINT, has its SIZE
• Width lt 10-22m, Length size of the Universe.
• Mass of 10km string the Earth

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Gravitational Lens

• A phenomenon that the space-time is distorted by
  a huge mass object, and multiple images of
  another object behind the massive object are
  observed around it.

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Search for Gravitational Lensescreated (?) by
Cosmic Strings

• SXDS data observed by Subaru
• Query results were obtained less than 5 min.,
  displaying SEDs
• It has been proven
• that VO can
• accelerate
• researches.

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Road Map

• 2003 Prototype 2
• ? development of components for operation
• 2004 start to develop operational system
• late 2004 ?? trial use
• 2005-2006 trial use upgrade
• 2007 prepare for partial operation of
• ALMA

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ALMA in Chile (sub-mm wave)EU-US-J Collaboration
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VO Projects in the world

• NVO (USA), AVO (EU),AstroGrid (UK)
• Germany, Canada, Russia, Australia
• India, China, Italy, France (CDS), Korea, JAPAN
• Interoperability International Virtual
  Observatory Alliance (IVOA)
• http//www.ivoa.net/
• CDS Strasbourg Data Center

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WGs in IVOA

• Registry, Data model, Data Access Layer, VOtable,
  VOQL, Grid, UCD, Standard Documents
• Executive Committee
• Interoperability meetings were held twice

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SkyQL ADQL

• JVOQL has been adopted as one of the basis for
  SkyQL (standard query language in IVOA)
• XML description of SkyQL ADQL
• Astronomical Data Query Language

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Virtual Observatory ? Common Infrastructure for
Astronomy