ASASSN-15rs superoutburst? Confirmed SU UMa-type DN. Frequent outbursts? YYYYMMDD(UT) mag observer 20170224.499 <160c (Mitsutaka Hiraga) 20170226.573 <160c (Mitsutaka Hiraga) 20170227.569 155c (Mitsutaka Hiraga) 20170301.515 151c (Mitsutaka Hiraga)