DO Vul superoutburst up to now: YYYYMMDD(UT) mag observer 20080721.133 15.33C (Eddy Muyllaert) 20080723.577 162C (Hiroyuki Maehara) 20080724.520 162C (Hiroyuki Maehara) 20080727.966 158C (Ian Miller) 20080729.098 16.24C (Eddy Muyllaert)