By cross matching blue objects from SDSS with GALEX and the astrometric catalogues USNO-B1.0, GSC2.3 and CMC14, 64 new dwarf nova candidates with one or more observed outbursts have been identified. 14 of these systems are confirmed as cataclysmic variables through existing and follow-up spectroscopy. A study of the amplitude distribution and an estimate of the outburst frequency of these new dwarf novae and those discovered by the Catalina Real-time Transient Survey (CRTS) indicates that besides systems that are faint because they are farther away, there also exists a population of intrinsically faint dwarf novae with rare outbursts.
@article{arxiv.0910.3218,
title = {Data Mining for Dwarf Novae in SDSS, GALEX and Astrometric Catalogues},
author = {Patrick Wils and Boris T. Gaensicke and Andrew J. Drake and John Southworth},
journal= {arXiv preprint arXiv:0910.3218},
year = {2014}
}