Comment on SN.... : In double galaxy system. A. V. Filippenko and R. Chornock report: "The supernova is probably a member of the southern spiral galaxy in the interacting pair UGC 5904, even though it appears projected closer to the nucleus of the northern elliptical galaxy". See IAU Circ. 8042, 2003. So the probable host galaxy is "PGC 32321" = "KPG248B" = "MCG+11-13-038A".
Comment on Gal... : U 5904 ;KPG248B;MCG+11-13-038A;PGC 32321
Host Galaxy information (for SNe discovered since January 2015):