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Table 1

Properties of iPTF13z light curve bumps.

Bump Maximum Duration Amplitude Band(s)
(day) (day) (mag)

B1 152 28 0.48 R
B2 372 35 0.75 g, R/r, i
B3 485 >123 0.90 g, R/r, i
B4 570 >71 0.40 r, i
B5 732 20 0.44 g, R/r,i



As bumps, we consider re-brightenings breaking the decline of the SN light curve, followed by renewed fading. The times of maxima, durations, and amplitudes given here are based on the linear fits to the decline-subtracted r-band light curve (Fig. 3b). Duration is measured from the time of positive crossing of Δm = 0 to the time of negative crossing. The “Band(s)” column specifies in which photometric band(s) the bumps were observed. The epochs of the maxima are given relative to time of SN discovery (JD 2 456 324.98).

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