GZ Cnc bright outburst Possibly a superoutburst? YYYYMMDD(UT) mag observer 20170130.519 <135 (Tsuneo Horie) 20170131.648 <154 (Hiroyuki Maehara) 20170202.530 130 (Rod Stubbings) 20170202.533 125 (Tsuneo Horie)