The NVO Portal

Tom McGlynn, NASA/GSFCGretchen Greene, ST ScI

John Good, IRSA/IPACRoy Williams, CACR/Caltech

Mike Fitzpatrick, NOAO

THE US NATIONAL VIRTUAL OBSERVATORY

Purpose

Make it easy for astronomers to find useful information in the VO

• Accommodate many different kinds of searches

• Web interface with no required downloads

• Easy linkage between Web and scripting capabilities

• No VO jargon

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Design

• Collaborating, distributed, simple elements• Standard protocol for transmitting information

between elements: • List of sources• List of resources

– All VOTables

• Elements call each other as appropriate with many starting points.

• Common templates and vocabulary

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Table ViewerTable Viewer RegistryRegistry InventoryInventory

CollectorCollector IntegratorIntegrator CommandLine

CommandLine

Table Translator

Table Translator

HelpHelp More ToolsMore Tools

Data Discovery Portal (concept)

Current Portal Home Page

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http://heasarc.gsfc.nasa.gov/vo/portal/

Portal help

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Registry

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Registry

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Registry

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Registry SearchMe -> Table Viewer

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Table Viewer: Display …

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TableViewer: … and Filter

ASCII FileXML FileVIM ServiceInventory Service

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Table Viewer: … and plot

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Viewer sends table to Inventory

.

Find resources with data near list of positions

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Inventory Service: View a result

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Build up table with VIM Integrator

See Roy’s talk later today.

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VIM Integrator: Getting lists of images

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DataScope Collector: single source

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Collector: Main page

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Collector: Resource summary

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Collector Aladin

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VOClient: Command Line Search and retrieval

VOClient capabilities

• VORegistry: search the registry• VOSesame: Name resolver• VOData: Query resources at a single or multiple

positions cat list | vodata -q -V -X -O - -p - -rd 1.4 \ ivo://nasa.heasarc/skyview/neat

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Table formatter

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Table Wizard

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See John McQ’s talk

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Key elements

• Common template -> coherent environment• Common JavaScript/XSLT VOTable processing

– Potentially useful in any Web app that displays VOTables.

• Standard formats for passing information among elements.

• VOClient used within inventory, table viewer as well as by users.

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Status and Plans

• All elements functional• Alpha release for comment and testing

– http://heasarc.gsfc.nasa.gov/vo/portal and links therein

• Registry inconsistencies can lead to services not being found.

• Further work in eliminating jargon and smoothing user experience.

• Beta release to public soon.• Please send comments!

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