Fig. 5

SNIbc to SNII ratio as a function of host galaxy SN multiplicity. Top panel: the full sample. The bin for galaxies with ≥ 4 SNe has a weighted mean number of SNe of 4.7. Error bars on the ratios are calculated using Poisson statistics (if the number of SNe within a distribution is less than 100, then we use Gehrels 1986 to estimate errors). The x-axis errors bars on the last point for ≥ 4 SNe show the standard deviation on the mean number of SNe within each galaxy within the bin. Bottom panel: a sub-sample containing only SNe discovered after the year 1990 (see Sect. 4.2 for more discussion). Here the bin for galaxies with ≥ 4 SNe has a weighted mean number of SNe of 5.
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.