Comment on SN.... : 1) A normal type-Ia supernova. See CBET 3451, 2013. 2) The best match to SN 2003du (Stanishev et al. 2007, A.Ap. 469, 645). See CBET 3458, 2013.
Comment on Gal... : The presumed host galaxy of 2013au, SDSS J122114.16+472951.0, has an r' magnitude of 22.2, implying an absolute magnitude for the host of only -14.2. (SN 2013au, see CBET 3451, 2013.)
Host Galaxy information (for SNe discovered since January 2015):