Gaia20byj SN or DN? http://gsaweb.ast.cam.ac.uk/alerts/alert/Gaia20byj Gaia20byj AT2020idu 2020-04-23 03:00:20 253.33511 27.43571 15.32 unknown 2020-04-25 13:17:17 apparently hostless blue transient, candidate SN