SN property comparison. a) Expected (line-only) and observed (gray) K magnitude distribution at the discovery. b) Expected (line-only) and observed (gray) extinction distribution. In light gray we indicate the allowed range for the extinction of PSN2010 (see text). c) Radial distribution of expected (line-only) and detected (dark grey) SNe. For regular galaxies the surface brightness decreases monotonically with radial distance. The upper axis shows this correspondence for one of the galaxy of our sample. In light gray we show the distribution of injected artificial SNe (see text).