Fig. 5.

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Bolometric light curve of SN 2018ibb from 1800 to 14 300 Å (rest-frame). The dotted lines indicate time segments with partial wavelength coverage. At peak SN 2018ibb reached a luminosity of > 2 × 1044 erg s−1. Integrating over the light curve from tmax–93 to tmax+706 days yields a radiated energy of 3 > ×1051 erg. Both values are conservative lower limits. The inset shows the evolution of the blackbody temperature and radius of the photospheric phase where photometry has been carried out from the u to H bands. The shaded regions indicate the 1σ statistical uncertainties.
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