M51
NGC 1068 & NGC 1510/12
NGC 4736 & NGC 3351
NGC 1365 & NGC 2841
NGC 1097 & NGC 1566
M101 & M83
NGC 2903 & NGC 925
M63 & NGC 1313
NGC 2403 & IC 2574
NGC 4214 & NGC 4449
NGC 3226/7 & NGC 3310
NGC 1672 & NGC 4038/9
NGC 5253 & NGC 3115
NGC 3379, 4151 & 4647/9
Figure 2
Figure 3
Figure 4a
Figure 4b
Figure 4c
Figure 4d
Figure 4e
Figure 4f
Figure 5
Figure 6
Figure 7
Figure 8
Figure 9
