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

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.

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.

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.

The Application Crossmatch consists of 3 parts: 1.Static web content (HTML & JavaScript); provides a query page for data searches and a framework for VOView. 2.VOView: a client-side VO app that provides a web browser user interface to VO Table data. 3.A proxy service; allows the user to acquire data from other domains

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

Demo

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