2. Prerequisites

python and astropy, of course (we assume Debian stable, at least; anaconda on proprietary systems should do, too)
TOPCAT for viewing and visualising tables
Aladin to work with images
PyVO. Get it from
- https://pypi.python.org/pypi/pyvo
- or try apt-get install python-pyvo
- or try pip install pyvo
- or try conda install pyvo