Discovery of Brown Dwarfs mining the 2MASS and SDSS databases

[ASTERICS VO School, Nov 2016, last update Nov 2017]
This tutorial uses the advanced VO functionalities of Aladin (interactive sky atlas), TOPCAT (tools to work on catalogs) and STILTS to find brown dwarfs in 2MASS and SDSS surveys using three differents methods. The user learns about the filtering, cross-matching and visualization functions of Aladin and TOPCAT as well as about the implementation of scripts for Aladin and STILTS to repeat several time the same steps leading to the identification of the brown dwarfs in these surveys.