RXJ0643.9-2052 recent (cont'd) YYYYMMDD(UT) mag observer 20001008.724 <140 (R. Stubbings) 20001016.812 <132 (A. Pearce) 20001017.821 <133 (A. Pearce) 20001018.803 <135 (A. Pearce) 20001021.769 <140 (A. Pearce) 20001022.808 <140 (A. Pearce) 20001023.790 <140 (A. Pearce) 20001024.787 <140 (A. Pearce) 20001025.808 <140 (A. Pearce) 20001027.646 <144 (R. Stubbings) 20001027.788 <140 (A. Pearce) 20001030.803 <140 (A. Pearce) 20001101.806 <140 (A. Pearce) 20001103.803 <140 (A. Pearce) 20001104.796 <140 (A. Pearce) 20001106.699 <144 (R. Stubbings) 20001107.710 <140 (R. Stubbings)