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Enhancing Astronomical Data Access: The NRAO Crossmatch Service

The NRAO Crossmatch Service, developed by Jared Crossley, aims to simplify astronomers' access to complementary data from multiple telescope archives. This service is motivated by requests from astronomers across various wavelengths for VLA data to enhance their own datasets. The application features a user-friendly interface, emphasizing the importance of multi-archive and multi-wavelength data access. Utilizing VO tools and standards, it incorporates a standard protocol for obtaining archival metadata through VO Simple Cone Search. Key components include interactive web content and a proxy service for efficient data retrieval.

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Enhancing Astronomical Data Access: The NRAO Crossmatch Service

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  1. Crossmatch:the NRAO Cross-identifcation Service Jared Crossley Data Archive Access Meeting - Socorro, NM - 5 April 2010

  2. the Goal Provide a way for astronomers to easily find complementary data in multiple telescope archives. the Motivation • Astronomers who work at other wavelengths have requested VLA data to complement their own data sets. • Increase accessibility of archival data, especially pre-processed data.

  3. Upshot for Archive Access • The application I’m developing may demonstrate a nice user interface to archival data. • Highlights the relevance of multi-archive & multi-wavelength data access. • Demonstrates the usefulness of VO tools and standards.

  4. Accessing Multiple Archives • A standard protocol for obtaining archival metadata: VO Simple Cone Search (SCS). • SCS is intended to provide catalog data, but some services distribute archival metadata instead. • For lack of a better alternative, use SCS.

  5. The Application Crossmatch consists of 3 parts: • Static web content (HTML & JavaScript); provides a query page for data searches and a framework for VOView. • VOView: a client-side VO app that provides a web browser user interface to VO Table data. • A proxy service; allows the user to acquire data from other domains

  6. VOView • Designed as an efficient interface to VO Tables with 1000 to 100,000 rows. • Uses XSLT to quickly process data • Provides: Pagination, Sorting, Filtering, Dynamic column re-ordering, showing/hiding columns, easily export data (XML, ASCII, …), Display column units, datatypes, & descriptions

  7. Demo http://webtest.aoc.nrao.edu/jcrossle/crossmatch/

  8. To-do List • Collapse partially redundant rows • Link table rows directly to archive data • Increase interactivity between display windows (sorting, filtering, …?)

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