SDSS J214807.80+293848.0 outburst Gaia detection. Gaia19dfx AT2019lyo 2019-07-29 03:18:35 327.03252 29.64667 16.42 18.72 1.24 unknown 2019-07-30 09:54:11 4 mag blue outburst, CV candidate http://gsaweb.ast.cam.ac.uk/alerts/alert/Gaia19dfx/