Possible linear correlation between the rise time to peak, and peak absolute magnitude for SNe Iax in the r-band. For comparison, we also show the region occupied by a few normal SNe Ia, using the estimated explosion epochs and data from sources listed in Table A.8. There is no clear demarcation between the SNe Ia and the SNe Iax at the bright end. Note that values shown for SN 2005cf and SN 2011fe are based on filter transformations (Jester et al. 2005). Unfilled circles denote measurements taken in the R-band, with the exception of SN 2004cs, which is based on unfiltered imaging. The data sources for all objects are listed in Table A.8. Grey crosses denote the models discussed in Sect. 5.
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