Obtaining catalog subsets of objects in selected regions of the sky is one of the most basic searches conducted in astronomy. In this tutorial, we will examine how to use software libraries in various languages included in the software distribution to build simple client applications for calling cone search services. The user will specify coordinates in Right Ascension and Declination, and a search radius. The cone search service will return a VOTable of objects that the user can analyze using VO tools or other software packages in their own environment.
The National Virtual Observatory: Tools and Techniques for Astronomical Research
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