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Fig. 8


Comparison of pre-explosion outbursts for SNe IIn. The r/R-band light curves of iPTF13z compared to SN 2010mc (Ofek et al. 2013a), LSQ13zm (Tartaglia et al. 2016), and SN 2015bh (Elias-Rosa et al. 2016), along with the 2012B outburst of SN 2009ip (Pastorello et al. 2013; Fraser et al. 2013a, 2015). For the plotting, the peak of iPTF13z has been assumed to occur at 0 day. For comparison, the red dashed line shows the mean limit of P48 detections in absolute magnitudes for the distance and MW extinction of iPTF13z.

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