NN Cen outburst YYYYMMDD(UT) mag observer 20010329.431 <140 (R. Stubbings) 20010330.451 <140 (R. Stubbings) 20010403.546 <135 (P. Nelson) 20010403.767 <144 (R. Stubbings) 20010404.562 <135 (P. Nelson) 20010405.791 <140 (R. Stubbings) 20010412.433 138 (R. Stubbings)