Fig. 14
Early time light curves (g and r-band) of iPTF15dtg (empty symbols) and SN 2011bm(=PTF11bov, filled symbols), with data from PTF and Valenti et al. (2012). Light curves are scaled to maximum. The early r-band data points reveal that there could be an excess in the emission of SN 2011bm, similar to what is observed for iPTF15dtg. The best power-law fit to the early data of SN 2011bm (excluding the first epoch) is shown by a dashed line.
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