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VO Tools
VO Enabled Mirage	abstract	www	download
VOTable Download Manager	abstract	www	download
Papers
Web Services for the Virtual Observatory	abstract	www	download
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Tools for the Virtual Observatory

VO Enabled Mirage

Authors: Samuel Carliles (JHU) and Tin Kam Ho (Bell Labs)
Date: August 2003

Astronomers commonly analyze astronomical data by imposing different views on the data, frequently viewing it in image form or as multi-dimensional plots. The ability to correlate the data in these views in order to see manifestations of patterns across views would be a powerful tool. The Mirage data visualization application offers this functionality. In order to increase the value of this tool to astronomers, we have added two features to Mirage, namely a module for viewing FITS images, and the ability to load VOTable data. During the process of adding the VOTable functionality to Mirage, we also developed a separate Java package, called the IVOAClient package, which can easily be integrated into any other Java application to provide the ability to load VOTable data via Cone search queries submitted to any Cone services published in a Registry, or by a direct SDSS CAS query.

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VOTable Download Manager

Authors: Samuel Carliles (JHU)
Date: August 2003

This IVOA client package is a set of classes which can be used by any Java application to retrieve VO data. It is currently used to provide VOTable functionality in VO Enabled Mirage. VOTable parsing is based on JAVOT and SAVOT.

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Selected Publications

Web Services for the Virtual Observatory

Authors: Alex Szalay¹, Tamás Budavári¹, Tanu Malik¹, Jim Gray², Ani Thakar¹
¹The Johns Hopkins University, ²Microsoft Research
Reference: SPIE Astronomy Telescopes and Instruments, 22-28 August 2002, Waikoloa, Hawaii

Web Services form a new, emerging paradigm to handle distributed access to resources over the Internet. There are platform independent standards (SOAP, WSDL), which make the developers? task considerably easier. This article discusses how web services could be used in the context of the Virtual Observatory. We envisage a multi-layer architecture, with interoperating services. A well-designed lower layer consisting of simple, standard services implemented by most data providers will go a long way towards establishing a modular architecture. More complex applications can be built upon this core layer. We present two prototype applications, the SdssCutout and the SkyQuery as examples of this layered architecture.

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