.

This is the third paper of the series and the outline is as follows. Section \[sample\] introduces sample selection and reduction. In Section \[resdiscus\], we give the results and discuss all the statistical relations. Our conclusions are summarized in Section \[concl\]. Throughout this paper, we adopt a cosmological model with $\Omega_{\rm m}=0.27$, $\Omega_{\rm \Lambda}=0.73$, and a Hubble constant is taken as $H_0=73 \,\rm km \,s^{-1} \,Mpc^{-1}$ [@2007ApJS..170..377S], both to conform to values used in our data base.

Sample selection and reduction {#sample}
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In this study, we compiled our sample by cross-matching the coordinates of classified Ia, Ibc[^3], and II SNe from the Asiago Supernova Catalogue[^4] with the coverage of SDSS DR10 [@2014ApJS..211...17A]. All SNe are required to have coordinates and/or positions (offsets) with respect to the nuclei of their host galaxies. We use SDSS DR10 and the techniques presented in Paper  to identify the SNe host galaxies and classify their morphological types. Since we are interested in studying the radial distribution of SNe in stellar discs of galaxies, the morphologies of hosts are restricted to S0–Sm types.

In Paper , we have shown that the sample of SNe is largely incomplete beyond ${\rm 100~Mpc}$ (see also Paper ). 