SISSA Searching for blazars: the BLEIS project

We present the aim and the status of the BLEIS project currently under development at SISSA. This project consists in selecting a complete Blazar sample from deep optical data, down to B=24.6, V=24.4 and I=23.7 (80% completness). The optical images are taken from the ESO Imaging Survey (EIS - Wide), a public survey covering ~16 deg2 of the Southern Emisphere. This new Blazar sample, thanks to the different energy band of the selection and to the faintness of EIS images, will be useful not only in understanding the physics of such objects, but also in evolutive and cosmological studies. It will also be a new test for the unified models of AGNs and will be helpful in making predictions for future deep surveys.